Pub Date : 2024-09-23DOI: 10.1016/j.jechem.2024.09.020
Ziying Zhang , Yu Dai , Shiyi Zhang, Liyi Chen, Jian Gu, Yong Wang, Weiwei Sun
Due to the significant impact of carbon dioxide on global ecology, more efforts have been put into the exploration on CO2 capture and utilization. Porous organic framework materials, as a kind of materials with high porosity and designable structure, have been considered as effective host materials for adsorbing carbon dioxide or separating it from other gases. This review gives a deep insight into the applications of metal-organic frameworks, covalent-organic frameworks, and other porous frameworks on CO2 capture, focusing on the enhanced capture performances originated from their high surface area with abundant porous structure, functional groups with specific heteroatoms modification, or other building unit interactions. Besides, the main challenges associated with porous frameworks for CO2 capture and proposed strategies to address these obstacles, including the structural design strategy or the capture mechanism exploration, have been demonstrated and emphasized. This review can contribute to further investigation on porous frameworks for gas capture and separation with enhanced performance and efficiency.
{"title":"Porous framework materials for CO2 capture","authors":"Ziying Zhang , Yu Dai , Shiyi Zhang, Liyi Chen, Jian Gu, Yong Wang, Weiwei Sun","doi":"10.1016/j.jechem.2024.09.020","DOIUrl":"10.1016/j.jechem.2024.09.020","url":null,"abstract":"<div><div>Due to the significant impact of carbon dioxide on global ecology, more efforts have been put into the exploration on CO<sub>2</sub> capture and utilization. Porous organic framework materials, as a kind of materials with high porosity and designable structure, have been considered as effective host materials for adsorbing carbon dioxide or separating it from other gases. This review gives a deep insight into the applications of metal-organic frameworks, covalent-organic frameworks, and other porous frameworks on CO<sub>2</sub> capture, focusing on the enhanced capture performances originated from their high surface area with abundant porous structure, functional groups with specific heteroatoms modification, or other building unit interactions. Besides, the main challenges associated with porous frameworks for CO<sub>2</sub> capture and proposed strategies to address these obstacles, including the structural design strategy or the capture mechanism exploration, have been demonstrated and emphasized. This review can contribute to further investigation on porous frameworks for gas capture and separation with enhanced performance and efficiency.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"101 ","pages":"Pages 278-297"},"PeriodicalIF":13.1,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.jechem.2024.08.067
Yameng Wang , Zi-Yu Liu , Yubei Su , Yu Liu , Aoqun Liu , Xiaoye Zhang , Yugang Huang , Liyun Zhang , Haisheng Chen , Wancheng Zhu
In light of the burgeoning energy technology sector and the ever-growing demand for lithium across diverse industrial domains, conventional lithium extraction methods have been proven inadequate due to their limited production capacity and high operational costs. This work introduces a novel approach to the manganese-titanium based composite HMTO (Mn:Ti=1:4) lithium ion-sieve (LIS) nanospheres, employing lithium acetate dihydrate, manganese carbonate and titanium dioxide P25 as the primary materials. These nanospheres exhibit relatively uniform spherical morphology, narrow size distribution, small average particle size (ca. 55 nm), large specific surface area (43.58 m2 g−1) and high surface O2− content (59.01%). When utilized as the adsorbents for Li+ ions, the HMTO (Mn:Ti=1:4) LIS demonstrates a fast adsorption rate, approaching equilibrium within 6.0 h with an equilibrium adsorption capacity (qe) of 79.5 mg g−1 and a maximum adsorption capacity (qm) of 87.26 mg g−1 (initial concentration C0: 1.8 g L−1). In addition, the HMTO (Mn:Ti=1:4) also delivers a high lithium extraction from the simulated high magnesium-lithium molar ratio salt lake brine (Mg:Li = 103), achieving a qe of 33.85 mg g−1 along with a remarkable selectivity (). Particularly, the HMTO (Mn:Ti=1:4) LIS showcases a satisfactory recycling adsorption performance. The adsorption capacity remains at a high level, even that determined after the 5th cycle (55.45 mg g−1) surpasses that of the most recently reported adsorbents. Ultimately, the fantastic synergistic lithium adsorption mechanism is deliberately uncovered by leveraging the ion exchange principles and molecular dynamics (MD) simulations.
{"title":"Uncovering fantastic synergistic lithium adsorption with manganese-titanium based composite nanospheres: Mild synthesis and molecular dynamics simulation insights","authors":"Yameng Wang , Zi-Yu Liu , Yubei Su , Yu Liu , Aoqun Liu , Xiaoye Zhang , Yugang Huang , Liyun Zhang , Haisheng Chen , Wancheng Zhu","doi":"10.1016/j.jechem.2024.08.067","DOIUrl":"10.1016/j.jechem.2024.08.067","url":null,"abstract":"<div><div>In light of the burgeoning energy technology sector and the ever-growing demand for lithium across diverse industrial domains, conventional lithium extraction methods have been proven inadequate due to their limited production capacity and high operational costs. This work introduces a novel approach to the manganese-titanium based composite HMTO (Mn:Ti=1:4) lithium ion-sieve (LIS) nanospheres, employing lithium acetate dihydrate, manganese carbonate and titanium dioxide P25 as the primary materials. These nanospheres exhibit relatively uniform spherical morphology, narrow size distribution, small average particle size (<em>ca.</em> 55 nm), large specific surface area (43.58 m<sup>2</sup> g<sup>−1</sup>) and high surface O<sup>2−</sup> content (59.01%). When utilized as the adsorbents for Li<sup>+</sup> ions, the HMTO (Mn:Ti=1:4) LIS demonstrates a fast adsorption rate, approaching equilibrium within 6.0 h with an equilibrium adsorption capacity (<em>q</em><sub>e</sub>) of 79.5 mg g<sup>−1</sup> and a maximum adsorption capacity (<em>q</em><sub>m</sub>) of 87.26 mg g<sup>−1</sup> (initial concentration <em>C</em><sub>0</sub>: 1.8 g L<sup>−1</sup>). In addition, the HMTO (Mn:Ti=1:4) also delivers a high lithium extraction from the simulated high magnesium-lithium molar ratio salt lake brine (Mg:Li = 103), achieving a <em>q</em><sub>e</sub> of 33.85 mg g<sup>−1</sup> along with a remarkable selectivity (<span><math><mrow><msubsup><mi>α</mi><mrow><mi>Mg</mi></mrow><mrow><mi>Li</mi></mrow></msubsup><mo>=</mo><mn>2192.76</mn></mrow></math></span>). Particularly, the HMTO (Mn:Ti=1:4) LIS showcases a satisfactory recycling adsorption performance. The adsorption capacity remains at a high level, even that determined after the 5th cycle (55.45 mg g<sup>−1</sup>) surpasses that of the most recently reported adsorbents. Ultimately, the fantastic synergistic lithium adsorption mechanism is deliberately uncovered by leveraging the ion exchange principles and molecular dynamics (MD) simulations.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"101 ","pages":"Pages 52-67"},"PeriodicalIF":13.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-20DOI: 10.1016/j.jechem.2024.09.021
Chuanping Lin , Jun Xu , Delong Jiang , Jiayang Hou , Ying Liang , Zhongyue Zou , Xuesong Mei
The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health (SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models, integrating multiple models for SOH estimation has received considerable attention. Ensemble learning (EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ensemble methods for battery SOH estimation. The convergence of advanced machine learning with ensemble learning is anticipated to yield valuable avenues for research. Accelerated research in ensemble learning holds promising prospects for achieving more accurate and reliable battery SOH estimation under real-world conditions.
{"title":"Multi-model ensemble learning for battery state-of-health estimation: Recent advances and perspectives","authors":"Chuanping Lin , Jun Xu , Delong Jiang , Jiayang Hou , Ying Liang , Zhongyue Zou , Xuesong Mei","doi":"10.1016/j.jechem.2024.09.021","DOIUrl":"10.1016/j.jechem.2024.09.021","url":null,"abstract":"<div><div>The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health (SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models, integrating multiple models for SOH estimation has received considerable attention. Ensemble learning (EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ensemble methods for battery SOH estimation. The convergence of advanced machine learning with ensemble learning is anticipated to yield valuable avenues for research. Accelerated research in ensemble learning holds promising prospects for achieving more accurate and reliable battery SOH estimation under real-world conditions.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 739-759"},"PeriodicalIF":13.1,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-20DOI: 10.1016/j.jechem.2024.09.019
Rahul Navik , Eryu Wang , Xiao Ding , Huang Yunyi , Yiyu Liu , Jia Li
Graphene has enormous potential to capture CO2 due to its unique properties and cost-effectiveness. However, graphene-based adsorbents have drawbacks of lower CO2 adsorption capacity and poor selectivity. This work demonstrates a one-step rapid and sustainable N2/H2 plasma treatment process to prepare graphene-based sorbent material with enhanced CO2 adsorption performance. Plasma treatment directly enriches amine species, increases surface area, and improves textural properties. The CO2 adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas, and from 0.14 to 1.3 mmol/g for direct air capture (DAC). Importantly, the electrothermal property of the plasma-modified aerogels has been significantly improved, resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of sorbents. Modified aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min, respectively. The plasma-treated aerogels display minimal loss between 17% and 19% in capacity after 40 adsorption/desorption cycles, rendering excellent stability. The N2/H2 plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change.
{"title":"Enhanced post-combustion CO2 capture and direct air capture by plasma surface functionalization of graphene adsorbent","authors":"Rahul Navik , Eryu Wang , Xiao Ding , Huang Yunyi , Yiyu Liu , Jia Li","doi":"10.1016/j.jechem.2024.09.019","DOIUrl":"10.1016/j.jechem.2024.09.019","url":null,"abstract":"<div><div>Graphene has enormous potential to capture CO<sub>2</sub> due to its unique properties and cost-effectiveness. However, graphene-based adsorbents have drawbacks of lower CO<sub>2</sub> adsorption capacity and poor selectivity. This work demonstrates a one-step rapid and sustainable N<sub>2</sub>/H<sub>2</sub> plasma treatment process to prepare graphene-based sorbent material with enhanced CO<sub>2</sub> adsorption performance. Plasma treatment directly enriches amine species, increases surface area, and improves textural properties. The CO<sub>2</sub> adsorption capacity increases from 1.6 to 3.3 mmol/g for capturing flue gas, and from 0.14 to 1.3 mmol/g for direct air capture (DAC). Importantly, the electrothermal property of the plasma-modified aerogels has been significantly improved, resulting in faster heating rates and significantly reducing energy consumption compared to conventional external heating for regeneration of sorbents. Modified aerogels display improved selectivity of 42 and 87 after plasma modification for 5 and 10 min, respectively. The plasma-treated aerogels display minimal loss between 17% and 19% in capacity after 40 adsorption/desorption cycles, rendering excellent stability. The N<sub>2</sub>/H<sub>2</sub> plasma treatment of adsorbent materials would lower energy expenses and prevent negative effects on the global economy caused by climate change.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 653-664"},"PeriodicalIF":13.1,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-20DOI: 10.1016/j.jechem.2024.09.022
Aadil Nabi Chishti , Sikandar Iqbal , Muhammad Ali , Moazzam Ali , Samia Aman , Hamid Hussain , Muhammad Yousaf , Yinzhu Jiang
Separator modification is an effective approach to suppress dendrite growth to realize high-energy sodium metal batteries (SMBs) in practical applications, however, its success is mainly subject to surface modification. Herein, a separator with multifunctional layers composed of N-doped mesoporous hollow carbon spheres (HCS) as the inner layer and sodium fluoride (NaF) as the outer layer on commercial polypropylene separator (PP) is proposed (PP@HCS-NaF) to achieve stable cycling in SMB. At the molecular level, the inner HCS layer with a high content of pyrrolic-N induces the uniform Na+ flux as a potential Na+ redistributor for homogenous deposition, whereas its hollow mesoporous structure offers nano-porous buffers and ion channels to regulate Na+ ion distribution and uniform deposition. The outer layer (NaF) constructs the NaF-enriched robust solid electrolyte interphase layer, significantly lowering the Na+ ions diffusion barrier. Benefiting from these merits, higher electrochemical performances are achieved with multifunctional double-layered PP@HCS-NaF separators compared with single-layered separators (i.e. PP@HCS or PP@NaF) in SMBs. The Na||Cu half-cell with PP@HCS-NaF offers stable cycling (280 cycles) with a high CE (99.6%), and Na||Na symmetric cells demonstrate extended lifespans for over 6000 h at 1 mA cm−2 with a progressively stable overpotential of 9 mV. Remarkably, in Na||NVP full-cells, the PP@HCS-NaF separator grants a stable capacity of ∼81 mA h g−1 after 3500 cycles at 1 C and an impressive rate capability performance (∼70 mA h g−1 at 15 C).
在实际应用中，隔膜改性是抑制枝晶生长以实现高能钠金属电池（SMB）的有效方法，但其成功与否主要取决于表面改性。本文提出了一种以掺杂 N 的介孔空心碳球（HCS）为内层、氟化钠（NaF）为外层的多功能隔膜，并将其置于商用聚丙烯隔膜（PP）上（PP@HCS-NaF），以实现钠金属电池的稳定循环。在分子水平上，高含量吡咯烷酮-N 的内层 HCS 可诱导均匀的 Na+ 通量，作为潜在的 Na+ 再分配器，实现均匀沉积，而其中空介孔结构则提供了纳米多孔缓冲器和离子通道，以调节 Na+ 离子分布和均匀沉积。外层（NaF）构建了富含 NaF 的坚固固体电解质相间层，大大降低了 Na+ 离子的扩散障碍。得益于这些优点，与 SMB 中的单层分离器（即 PP@HCS 或 PP@NaF）相比，多功能双层 PP@HCS-NaF 分离器实现了更高的电化学性能。采用 PP@HCS-NaF 的 Na||Cu 半电池可实现稳定的循环（280 个循环）和较高的 CE（99.6%），Na||Na 对称电池在 1 mA cm-2 的条件下可延长寿命超过 6000 小时，过电位逐渐稳定在 9 mV。值得注意的是，在 Na||NVP 全电池中，PP@HCS-NaF 分离剂在 1 C 条件下循环 3500 次后，可提供 ∼81 mA h g-1 的稳定容量，并具有令人印象深刻的速率能力性能（15 C 条件下 ∼70 mA h g-1）。
{"title":"Modification of polypropylene separator with multifunctional layers to achieve highly stable sodium metal anode","authors":"Aadil Nabi Chishti , Sikandar Iqbal , Muhammad Ali , Moazzam Ali , Samia Aman , Hamid Hussain , Muhammad Yousaf , Yinzhu Jiang","doi":"10.1016/j.jechem.2024.09.022","DOIUrl":"10.1016/j.jechem.2024.09.022","url":null,"abstract":"<div><div>Separator modification is an effective approach to suppress dendrite growth to realize high-energy sodium metal batteries (SMBs) in practical applications, however, its success is mainly subject to surface modification. Herein, a separator with multifunctional layers composed of N-doped mesoporous hollow carbon spheres (HCS) as the inner layer and sodium fluoride (NaF) as the outer layer on commercial polypropylene separator (PP) is proposed (PP@HCS-NaF) to achieve stable cycling in SMB. At the molecular level, the inner HCS layer with a high content of pyrrolic-N induces the uniform Na<sup>+</sup> flux as a potential Na<sup>+</sup> redistributor for homogenous deposition, whereas its hollow mesoporous structure offers nano-porous buffers and ion channels to regulate Na<sup>+</sup> ion distribution and uniform deposition. The outer layer (NaF) constructs the NaF-enriched robust solid electrolyte interphase layer, significantly lowering the Na<sup>+</sup> ions diffusion barrier. Benefiting from these merits, higher electrochemical performances are achieved with multifunctional double-layered PP@HCS-NaF separators compared with single-layered separators (i.e. PP@HCS or PP@NaF) in SMBs. The Na||Cu half-cell with PP@HCS-NaF offers stable cycling (280 cycles) with a high CE (99.6%), and Na||Na symmetric cells demonstrate extended lifespans for over 6000 h at 1 mA cm<sup>−2</sup> with a progressively stable overpotential of 9 mV. Remarkably, in Na||NVP full-cells, the PP@HCS-NaF separator grants a stable capacity of ∼81 mA h g<sup>−1</sup> after 3500 cycles at 1 C and an impressive rate capability performance (∼70 mA h g<sup>−1</sup> at 15 C).</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"101 ","pages":"Pages 223-232"},"PeriodicalIF":13.1,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-19DOI: 10.1016/j.jechem.2024.09.018
Wenxuan Chen , Xiu-Qing Qiao , Guo Hui , Bojing Sun , Dongfang Hou , Meidi Wang , Xueqian Wu , Tao Wu , Dong-Sheng Li
Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging, primarily due to the limitations in charge transfer kinetics. Herein, a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction, Schottky junction, and photothermal effect. The difference in atomic configuration between cubic-CdS (c-CdS) and hexagonal-CdS (h-CdS) leads to effective charge separation through a typical II charge transfer mechanism, and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge transfer. Besides, the photothermal effect of Mo2C@C helps to expand the light absorption, accelerate charge transfer kinetics, and reduce the hydrogen evolution energy barrier. The carbon layer provides a fast channel for charge transfer and protects the photocatalyst from photocorrosion. As a result, the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2 production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%, surpassing most of the reported photocatalysts. This study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.
{"title":"Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production","authors":"Wenxuan Chen , Xiu-Qing Qiao , Guo Hui , Bojing Sun , Dongfang Hou , Meidi Wang , Xueqian Wu , Tao Wu , Dong-Sheng Li","doi":"10.1016/j.jechem.2024.09.018","DOIUrl":"10.1016/j.jechem.2024.09.018","url":null,"abstract":"<div><div>Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging, primarily due to the limitations in charge transfer kinetics. Herein, a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo<sub>2</sub>C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction, Schottky junction, and photothermal effect. The difference in atomic configuration between cubic-CdS (c-CdS) and hexagonal-CdS (h-CdS) leads to effective charge separation through a typical II charge transfer mechanism, and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge transfer. Besides, the photothermal effect of Mo<sub>2</sub>C@C helps to expand the light absorption, accelerate charge transfer kinetics, and reduce the hydrogen evolution energy barrier. The carbon layer provides a fast channel for charge transfer and protects the photocatalyst from photocorrosion. As a result, the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H<sub>2</sub> production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%, surpassing most of the reported photocatalysts. This study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 710-720"},"PeriodicalIF":13.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-18DOI: 10.1016/j.jechem.2024.09.016
Chunliu Zhu , Huanyu Liang , Ping Li , Chenglong Qiu , Jingyi Wu , Jingwei Chen , Weiqian Tian , Yue Zhu , Zhi Li , Huanlei Wang
Zinc-ion hybrid capacitors (ZIHCs) have received increasing attention as energy storage devices owing to their low cost, high safety, and environmental friendliness. However, their progress has been hampered by low energy and power density, as well as unsatisfactory long-cycle stability, mainly due to the lack of suitable electrode materials. In this context, we have developed manganese single atoms implanted in nitrogen-doped porous carbon nanosheets (MnSAs/NCNs) using a metal salt template method as cathodes for ZIHCs. The metal salt serves a dual purpose in the synthesis process: It facilitates the uniform dispersion of Mn atoms within the carbon matrix and acts as an activating agent to create the porous structure. When applied in ZIHCs, the MnSAs/NCNs electrode demonstrates exceptional performance, including a high capacity of 203 mAh g−1, an energy density of 138 Wh kg−1 at 68 W kg−1, and excellent cycle stability with 91% retention over 10,000 cycles. Theoretical calculations indicate that the introduced Mn atoms modulate the local charge distribution of carbon materials, thereby improving the electrochemical property. This work demonstrates the significant potential of carbon materials with metal atoms in zinc-ion hybrid capacitors, not only in enhancing electrochemical performance but also in providing new insights and methods for developing high-performance energy storage devices.
锌离子混合电容器（ZIHC）因其低成本、高安全性和环境友好性而作为储能设备受到越来越多的关注。然而，由于缺乏合适的电极材料，锌离子混合电容器的发展一直受到能量和功率密度低以及长周期稳定性不理想的阻碍。在此背景下，我们采用金属盐模板法，开发了植入氮掺杂多孔碳纳米片（MnSAs/NCNs）中的锰单原子，作为 ZIHC 的阴极。金属盐在合成过程中具有双重作用：它有助于锰原子在碳基质中的均匀分散，并作为活化剂形成多孔结构。当应用于 ZIHC 时，MnSAs/NCNs 电极表现出了卓越的性能，包括 203 mAh g-1 的高容量、68 W kg-1 时 138 Wh kg-1 的能量密度，以及卓越的循环稳定性（10000 次循环保持率为 91%）。理论计算表明，引入的锰原子调节了碳材料的局部电荷分布，从而改善了电化学性能。这项研究表明，含有金属原子的碳材料在锌离子混合电容器中具有巨大潜力，不仅能提高电化学性能，还能为开发高性能储能器件提供新的见解和方法。
{"title":"“One stone, two birds”: Salt template enabling porosity engineering and single metal atom coordinating toward high-performance zinc-ion capacitors","authors":"Chunliu Zhu , Huanyu Liang , Ping Li , Chenglong Qiu , Jingyi Wu , Jingwei Chen , Weiqian Tian , Yue Zhu , Zhi Li , Huanlei Wang","doi":"10.1016/j.jechem.2024.09.016","DOIUrl":"10.1016/j.jechem.2024.09.016","url":null,"abstract":"<div><div>Zinc-ion hybrid capacitors (ZIHCs) have received increasing attention as energy storage devices owing to their low cost, high safety, and environmental friendliness. However, their progress has been hampered by low energy and power density, as well as unsatisfactory long-cycle stability, mainly due to the lack of suitable electrode materials. In this context, we have developed manganese single atoms implanted in nitrogen-doped porous carbon nanosheets (MnSAs/NCNs) using a metal salt template method as cathodes for ZIHCs. The metal salt serves a dual purpose in the synthesis process: It facilitates the uniform dispersion of Mn atoms within the carbon matrix and acts as an activating agent to create the porous structure. When applied in ZIHCs, the MnSAs/NCNs electrode demonstrates exceptional performance, including a high capacity of 203 mAh g<sup>−1</sup>, an energy density of 138 Wh kg<sup>−1</sup> at 68 W kg<sup>−1</sup>, and excellent cycle stability with 91% retention over 10,000 cycles. Theoretical calculations indicate that the introduced Mn atoms modulate the local charge distribution of carbon materials, thereby improving the electrochemical property. This work demonstrates the significant potential of carbon materials with metal atoms in zinc-ion hybrid capacitors, not only in enhancing electrochemical performance but also in providing new insights and methods for developing high-performance energy storage devices.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 637-645"},"PeriodicalIF":13.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-17DOI: 10.1016/j.jechem.2024.09.017
Zhi Li , Yang Wei , Kang Zhou , Xin Huang , Xing Zhou , Jie Xu , Taoyi Kong , Junwei Lucas Bao , Xiaoli Dong , Yonggang Wang
Sodium-ion batteries (SIBs) with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C, H, O, and sodium ions. Currently, organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials (>1 V). Organic electrodes with low redox potential that can be used as anode are rare. Herein, a novel organic anode material (tetrasodium 1,4,5,8-naphthalenetetracarboxylate, Na4TDC) has been developed with low redox potential (<0.7 V) and excellent cyclic stability. Its three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations, showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022% per cycle. Moreover, the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg cm−2. By pairing with a thick Na3V2(PO4)3 cathode (20.6 mg cm−2), the as-fabricated full cell exhibited high operating voltage (2.8 V), excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles, well highlighting the Na4TDC anode material for SIBs.
{"title":"A low redox potential and long life organic anode material for sodium-ion batteries","authors":"Zhi Li , Yang Wei , Kang Zhou , Xin Huang , Xing Zhou , Jie Xu , Taoyi Kong , Junwei Lucas Bao , Xiaoli Dong , Yonggang Wang","doi":"10.1016/j.jechem.2024.09.017","DOIUrl":"10.1016/j.jechem.2024.09.017","url":null,"abstract":"<div><div>Sodium-ion batteries (SIBs) with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C, H, O, and sodium ions. Currently, organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials (>1 V). Organic electrodes with low redox potential that can be used as anode are rare. Herein, a novel organic anode material (tetrasodium 1,4,5,8-naphthalenetetracarboxylate, Na<sub>4</sub>TDC) has been developed with low redox potential (<0.7 V) and excellent cyclic stability. Its three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations, showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022% per cycle. Moreover, the Na<sub>4</sub>TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg cm<sup>−2</sup>. By pairing with a thick Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cathode (20.6 mg cm<sup>−2</sup>), the as-fabricated full cell exhibited high operating voltage (2.8 V), excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles, well highlighting the Na<sub>4</sub>TDC anode material for SIBs.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 557-564"},"PeriodicalIF":13.1,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-17DOI: 10.1016/j.jechem.2024.09.015
Zewen Liu , Zhen Wu , Hao Wang , Xudong Zhang , Yuanzhen Chen , Yongning Liu , Shengwu Guo , Shenghua Chen , Yanli Nan , Yan Liu
Lithium-rich layered oxides (LLOs) are increasingly recognized as promising cathode materials for next-generation high-energy-density lithium-ion batteries (LIBs). However, they suffer from voltage decay and low initial Coulombic efficiency (ICE) due to severe structural degradation caused by irreversible O release. Herein, we introduce a three-in-one strategy of increasing Ni and Mn content, along with Li/Ni disordering and TM–O covalency regulation to boost cationic and anionic redox activity simultaneously and thus enhance the electrochemical activity of LLOs. The target material, Li1.2Ni0.168Mn0.558Co0.074O2 (L1), exhibits an improved ICE of 87.2% and specific capacity of 293.2 mA h g−1 and minimal voltage decay of less than 0.53 mV cycle−1 over 300 cycles at 1C, compared to Li1.2Ni0.13Mn0.54Co0.13O2 (Ls) (274.4 mA h g−1 for initial capacity, 73.8% for ICE and voltage decay of 0.84 mV/cycle over 300 cycles at 1C). Theoretical calculations reveal that the density of states (DOS) area near the Fermi energy level for L1 is larger than that of Ls, indicating higher anionic and cationic redox reactivity than Ls. Moreover, L1 exhibits increased O-vacancy formation energy due to higher Li/Ni disordering of 4.76% (quantified by X-ray diffraction Rietveld refinement) and enhanced TM–O covalency, making lattice O release more difficult and thus improving electrochemical stability. The increased Li/Ni disordering also leads to more Ni2+ presence in the Li layer, which acts as a pillar during Li+ de-embedding, improving structural stability. This research not only presents a viable approach to designing low-Co LLOs with enhanced capacity and ICE but also contributes significantly to the fundamental understanding of structural regulation in high-performance LIB cathodes.
富锂层状氧化物（LLOs）作为下一代高能量密度锂离子电池（LIBs）的正极材料，越来越受到人们的认可。然而，由于不可逆 O 释放导致的严重结构退化，它们存在电压衰减和初始库仑效率（ICE）低的问题。在此，我们引入了一种三合一策略，即增加镍和锰的含量，同时进行锂/镍无序化和 TM-O 共价调节，以同时提高阳离子和阴离子氧化还原活性，从而增强 LLO 的电化学活性。目标材料 Li1.2Ni0.168Mn0.558Co0.074O2 (L1) 的 ICE 提高了 87.2%，比容量达到 293.2 mA h g-1，电压衰减小于 0.相比之下，Li1.2Ni0.13Mn0.54Co0.13O2（Ls）的初始容量为 274.4 mA h g-1，ICE 为 73.8%，在 1C 下循环 300 次的电压衰减为 0.84 mV/周期。理论计算显示，L1 在费米能级附近的状态密度（DOS）区域大于 Ls，这表明其阴离子和阳离子氧化还原反应活性高于 Ls。此外，由于 L1 的锂/镍无序度更高，达到 4.76%（通过 X 射线衍射 Rietveld 精炼量化），且 TM-O 共价性增强，L1 显示出更高的 O 空位形成能，使晶格 O 更难释放，从而提高了电化学稳定性。此外，Li/Ni 无序度的增加还导致 Li 层中存在更多的 Ni2+，在 Li+ 脱嵌过程中起到支柱作用，从而提高了结构的稳定性。这项研究不仅为设计具有更高容量和 ICE 的低 Co LLO 提供了一种可行的方法，而且极大地促进了对高性能 LIB 阴极结构调节的基本理解。
{"title":"Boosting cationic and anionic redox activity of Li-rich layered oxide cathodes via Li/Ni disordered regulation","authors":"Zewen Liu , Zhen Wu , Hao Wang , Xudong Zhang , Yuanzhen Chen , Yongning Liu , Shengwu Guo , Shenghua Chen , Yanli Nan , Yan Liu","doi":"10.1016/j.jechem.2024.09.015","DOIUrl":"10.1016/j.jechem.2024.09.015","url":null,"abstract":"<div><div>Lithium-rich layered oxides (LLOs) are increasingly recognized as promising cathode materials for next-generation high-energy-density lithium-ion batteries (LIBs). However, they suffer from voltage decay and low initial Coulombic efficiency (ICE) due to severe structural degradation caused by irreversible O release. Herein, we introduce a three-in-one strategy of increasing Ni and Mn content, along with Li/Ni disordering and TM–O covalency regulation to boost cationic and anionic redox activity simultaneously and thus enhance the electrochemical activity of LLOs. The target material, Li<sub>1.2</sub>Ni<sub>0.168</sub>Mn<sub>0.558</sub>Co<sub>0.074</sub>O<sub>2</sub> (L1), exhibits an improved ICE of 87.2% and specific capacity of 293.2 mA h g<sup>−1</sup> and minimal voltage decay of less than 0.53 mV cycle<sup>−1</sup> over 300 cycles at 1C, compared to Li<sub>1.2</sub>Ni<sub>0.13</sub>Mn<sub>0.54</sub>Co<sub>0.13</sub>O<sub>2</sub> (Ls) (274.4 mA h g<sup>−1</sup> for initial capacity, 73.8% for ICE and voltage decay of 0.84 mV/cycle over 300 cycles at 1C). Theoretical calculations reveal that the density of states (DOS) area near the Fermi energy level for L1 is larger than that of Ls, indicating higher anionic and cationic redox reactivity than Ls. Moreover, L1 exhibits increased O-vacancy formation energy due to higher Li/Ni disordering of 4.76% (quantified by X-ray diffraction Rietveld refinement) and enhanced TM–O covalency, making lattice O release more difficult and thus improving electrochemical stability. The increased Li/Ni disordering also leads to more Ni<sup>2+</sup> presence in the Li layer, which acts as a pillar during Li<sup>+</sup> de-embedding, improving structural stability. This research not only presents a viable approach to designing low-Co LLOs with enhanced capacity and ICE but also contributes significantly to the fundamental understanding of structural regulation in high-performance LIB cathodes.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 533-543"},"PeriodicalIF":13.1,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-17DOI: 10.1016/j.jechem.2024.09.014
Haocheng Xiong , Donghuan Wu , Haonan Li , Andrew Li , Qikun Hu , Siyao Song , Bingjun Xu , Qi Lu
Renewable energy-driven bicarbonate conversion to valuable chemicals presents an attractive strategy for mitigating CO2 emissions, as bicarbonate can be efficiently generated from the capture of atmospheric CO2 using alkaline solutions with reactive absorption. In this work, we present a CO2-mediated bicarbonate conversion to pure formate using a cation exchange membrane-based electrolyzer with a 25 cm2 electrode area. Our electrolysis achieved selectivities exceeding 75% for formate at a total current of 2.5 A, achieving formate concentrations up to 1.2 M and yields as high as 95% over extended periods. The techno-economic assessment confirmed the economic viability of the process, highlighting the potential for bicarbonate electrolysis as a sustainable method for producing valuable chemicals.
可再生能源驱动的碳酸氢盐转化为有价值的化学物质为减少二氧化碳排放提供了一种极具吸引力的策略，因为碳酸氢盐可以通过使用具有反应吸收功能的碱性溶液捕获大气中的二氧化碳而高效生成。在这项工作中，我们使用阳离子交换膜电解槽（电极面积为 25 cm2），将二氧化碳介导的碳酸氢盐转化为纯甲酸盐。在总电流为 2.5 A 的情况下，我们的电解法对甲酸盐的选择性超过 75%，甲酸盐浓度高达 1.2 M，长期产量高达 95%。技术经济评估证实了该工艺的经济可行性，突出了碳酸氢盐电解作为生产有价值化学品的可持续方法的潜力。
{"title":"CO2-mediated bicarbonate conversion to concentrated formate in a CEM-based electrolyzer","authors":"Haocheng Xiong , Donghuan Wu , Haonan Li , Andrew Li , Qikun Hu , Siyao Song , Bingjun Xu , Qi Lu","doi":"10.1016/j.jechem.2024.09.014","DOIUrl":"10.1016/j.jechem.2024.09.014","url":null,"abstract":"<div><div>Renewable energy-driven bicarbonate conversion to valuable chemicals presents an attractive strategy for mitigating CO<sub>2</sub> emissions, as bicarbonate can be efficiently generated from the capture of atmospheric CO<sub>2</sub> using alkaline solutions with reactive absorption. In this work, we present a CO<sub>2</sub>-mediated bicarbonate conversion to pure formate using a cation exchange membrane-based electrolyzer with a 25 cm<sup>2</sup> electrode area. Our electrolysis achieved selectivities exceeding 75% for formate at a total current of 2.5 A, achieving formate concentrations up to 1.2 M and yields as high as 95% over extended periods. The techno-economic assessment confirmed the economic viability of the process, highlighting the potential for bicarbonate electrolysis as a sustainable method for producing valuable chemicals.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"100 ","pages":"Pages 605-611"},"PeriodicalIF":13.1,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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