Pub Date : 2024-11-28DOI: 10.1016/j.jpowsour.2024.235919
Jia Cheng, Zhiwei Zeng, Xun Huang, Zidong Wei
The electrocatalytic oxidation of furfural (FA) for the production of valuable chemicals, such as 2-furancarboxylic acid (FAC), presents an attractive alternative to the sluggish oxygen evolution reaction during water electrolysis for hydrogen production. However, the activity and stability of the current electrocatalysts still require further enhancement. In this study, NiMoP is fabricated on Ni foam through pulsed electrodeposition to facilitate the electrooxidation of FA for FAC production in an alkaline environment. A low voltage of 1.43 V vs. reversible hydrogen electrode (RHE) is adequate to achieve a current density of 500 mA cm−2, with FAC selectivity and Faraday efficiency reaching 97.5 % and 95.2 %, respectively. The extended electrolysis of FA using a continuous-flow electrolytic cell under high current density (500 mA cm−2) demonstrates consistent stability at a cell voltage around 1.8 V over a 35-h duration.
通过电催化氧化糠醛（FA）来生产有价值的化学品，如 2-呋喃甲酸（FAC），是电解水制氢过程中缓慢的氧进化反应的一种有吸引力的替代方法。然而，目前电催化剂的活性和稳定性仍有待进一步提高。在本研究中，通过脉冲电沉积在镍泡沫上制备了 NiMoP，以促进 FA 在碱性环境中的电氧化反应，从而产生 FAC。与可逆氢电极（RHE）相比，1.43 V 的低电压足以使电流密度达到 500 mA cm-2，FAC 选择性和法拉第效率分别达到 97.5 % 和 95.2 %。在高电流密度（500 mA cm-2）条件下，使用连续流电解槽对 FA 进行长时间电解，结果表明，在持续 35 小时的时间内，电解槽电压始终稳定在 1.8 V 左右。
{"title":"Electrooxidation of furfural on an electrodeposited NiMoP electrode to simultaneously produce hydrogen and 2-furancarboxylic acid at industrial current levels","authors":"Jia Cheng, Zhiwei Zeng, Xun Huang, Zidong Wei","doi":"10.1016/j.jpowsour.2024.235919","DOIUrl":"10.1016/j.jpowsour.2024.235919","url":null,"abstract":"<div><div>The electrocatalytic oxidation of furfural (FA) for the production of valuable chemicals, such as 2-furancarboxylic acid (FAC), presents an attractive alternative to the sluggish oxygen evolution reaction during water electrolysis for hydrogen production. However, the activity and stability of the current electrocatalysts still require further enhancement. In this study, NiMoP is fabricated on Ni foam through pulsed electrodeposition to facilitate the electrooxidation of FA for FAC production in an alkaline environment. A low voltage of 1.43 V vs. reversible hydrogen electrode (RHE) is adequate to achieve a current density of 500 mA cm<sup>−2</sup>, with FAC selectivity and Faraday efficiency reaching 97.5 % and 95.2 %, respectively. The extended electrolysis of FA using a continuous-flow electrolytic cell under high current density (500 mA cm<sup>−2</sup>) demonstrates consistent stability at a cell voltage around 1.8 V over a 35-h duration.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":""},"PeriodicalIF":8.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235924
Dan Mou, Yueming Lin, Xiaohong Zhu
Sodium-ion batteries represent a promising alternative to lithium-ion batteries, necessitating research into cost-effective synthesis of high-performance anode materials. Herein, this work proposes a facile method combining sucrose-anthracite composites with KOH&HCl decontamination to produce soft/hard carbon hybrids. This approach enhances the structural stability of the material to optimize the carbon yield and increases the interlayer spacing and microcrystalline disorder. The presence of numerous defect sites and C=O active double bonds within the structure, coupled with the flaky morphology, results in an outstanding carbon anode material, exhibiting a high specific capacity of 272 mAh g−1 with excellent rate performance (229 mAh g−1 at 10 C). Furthermore, the material maintains 80 % capacity over 1300 cycles at a high current density of 10 C. The optimization in structure and morphology, along with enhanced electronic conductivity and ionic diffusion kinetics, also ensures that the capacity of the material is dominated by plateau capacity at any current density, which is beneficial for increasing the energy density of full battery configurations and holds promise for high-performance sodium-ion battery anode materials.
钠离子电池有望成为锂离子电池的替代品，因此有必要研究具有成本效益的高性能负极材料合成方法。在此，本研究提出了一种结合蔗糖-无烟煤复合材料与 KOH&HCl 去污的简便方法，以生产软/硬碳混合材料。这种方法提高了材料的结构稳定性，从而优化了碳产量，并增加了层间间距和微晶无序度。结构中存在大量缺陷位点和 C=O 活性双键，再加上片状形态，造就了一种出色的碳负极材料，比容量高达 272 mAh g-1，并具有出色的速率性能（10 C 时为 229 mAh g-1）。结构和形态的优化，以及电子导电性和离子扩散动力学的增强，还确保了该材料在任何电流密度下的容量都以高原容量为主，这有利于提高全电池配置的能量密度，并为高性能钠离子电池负极材料带来了希望。
{"title":"Sucrose-anthracite composite supplemented by KOH&HCl washing strategy for high-performance carbon anode material of sodium-ion batteries","authors":"Dan Mou, Yueming Lin, Xiaohong Zhu","doi":"10.1016/j.jpowsour.2024.235924","DOIUrl":"10.1016/j.jpowsour.2024.235924","url":null,"abstract":"<div><div>Sodium-ion batteries represent a promising alternative to lithium-ion batteries, necessitating research into cost-effective synthesis of high-performance anode materials. Herein, this work proposes a facile method combining sucrose-anthracite composites with KOH&HCl decontamination to produce soft/hard carbon hybrids. This approach enhances the structural stability of the material to optimize the carbon yield and increases the interlayer spacing and microcrystalline disorder. The presence of numerous defect sites and C=O active double bonds within the structure, coupled with the flaky morphology, results in an outstanding carbon anode material, exhibiting a high specific capacity of 272 mAh g<sup>−1</sup> with excellent rate performance (229 mAh g<sup>−1</sup> at 10 C). Furthermore, the material maintains 80 % capacity over 1300 cycles at a high current density of 10 C. The optimization in structure and morphology, along with enhanced electronic conductivity and ionic diffusion kinetics, also ensures that the capacity of the material is dominated by plateau capacity at any current density, which is beneficial for increasing the energy density of full battery configurations and holds promise for high-performance sodium-ion battery anode materials.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235924"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235832
Kemeng Jia , Yanqiu Xie , Xin Gao , He Bai , Fei Yao , Shuai Yang , Qian Li , Hongyan Yue
Elemental doping and morphological modulation become important strategies for designing electrode materials of high performance supercapacitor. In this paper, Mo and Ni doped cobalt carbonate hydroxide (CCH) nanoneedle arrays (Ni(OH)2@Mo, Ni-CCH) on Ni foam (NF) are first obtained by hydrothermal synthesis. After S doping, Ni(OH)2 nanosheet arrays are cross-linked among Mo, Ni, S doped CCH nanoneedle arrays (Ni(OH)2@Mo, Ni, S-CCH) on NF at room temperature. The Ni(OH)2@Mo, Ni, S-CCH/NF demonstrates a remarkable high specific capacity of 1765 C g−1 at 1 A g−1 and cycle life of 82.1 % after 10, 000 cycles, which is attributed to the synergistic effects of high conductive Ni and Mo doped CCH and microstructural modulation after S doping. Upon assembly with activated carbon (AC), the hybrid supercapacitor (HSC) demonstrates an impressive high energy density of 60.15 Wh kg−1 (at 615.51 W kg−1), maintaining a capacity retention ratio of 91.82 % even after 10, 000 cycles. This demonstrates the great potential of Ni(OH)2@Mo, Ni, S-CCH/NF as an advanced HSC electrode.
元素掺杂和形态调控已成为设计高性能超级电容器电极材料的重要策略。本文首先通过水热合成法在泡沫镍（NF）上获得了掺杂钼和镍的碳酸钴（CCH）纳米针状阵列（Ni(OH)2@Mo，Ni-CCH）。掺杂 S 后，NF 上的镍（OH）2 纳米片阵列与掺杂 Mo、Ni 和 S 的 CCH 纳米针阵列（镍（OH）2@Mo、Ni、S-CCH）在室温下交联。Ni（OH）2@Mo、Ni、S-CCH/NF 在 1 A g-1 的条件下具有显著的高比容量（1765 C g-1），循环寿命在 10,000 次后达到 82.1%，这归功于掺杂高导电性镍和钼的 CCH 以及掺杂 S 后的微结构调制的协同效应。在与活性炭（AC）组装后，混合超级电容器（HSC）显示出令人印象深刻的高能量密度，达到 60.15 Wh kg-1（615.51 W kg-1），即使在 10,000 次循环后仍能保持 91.82 % 的容量保持率。这证明了 Ni(OH)2@Mo、Ni、S-CCH/NF 作为先进的 HSC 电极的巨大潜力。
{"title":"Mo, Ni, S doped cobalt carbonate hydroxide ultrathin nanosheet arrays on nickel foam for high-performance hybrid supercapacitors","authors":"Kemeng Jia , Yanqiu Xie , Xin Gao , He Bai , Fei Yao , Shuai Yang , Qian Li , Hongyan Yue","doi":"10.1016/j.jpowsour.2024.235832","DOIUrl":"10.1016/j.jpowsour.2024.235832","url":null,"abstract":"<div><div>Elemental doping and morphological modulation become important strategies for designing electrode materials of high performance supercapacitor. In this paper, Mo and Ni doped cobalt carbonate hydroxide (CCH) nanoneedle arrays (Ni(OH)<sub>2</sub>@Mo, Ni-CCH) on Ni foam (NF) are first obtained by hydrothermal synthesis. After S doping, Ni(OH)<sub>2</sub> nanosheet arrays are cross-linked among Mo, Ni, S doped CCH nanoneedle arrays (Ni(OH)<sub>2</sub>@Mo, Ni, S-CCH) on NF at room temperature. The Ni(OH)<sub>2</sub>@Mo, Ni, S-CCH/NF demonstrates a remarkable high specific capacity of 1765 C g<sup>−1</sup> at 1 A g<sup>−1</sup> and cycle life of 82.1 % after 10, 000 cycles, which is attributed to the synergistic effects of high conductive Ni and Mo doped CCH and microstructural modulation after S doping. Upon assembly with activated carbon (AC), the hybrid supercapacitor (HSC) demonstrates an impressive high energy density of 60.15 Wh kg<sup>−1</sup> (at 615.51 W kg<sup>−1</sup>), maintaining a capacity retention ratio of 91.82 % even after 10, 000 cycles. This demonstrates the great potential of Ni(OH)<sub>2</sub>@Mo, Ni, S-CCH/NF as an advanced HSC electrode.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235832"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235760
M. Badfar, M. Yildirim, R.B. Chinnam
Battery management systems play a critical role in the ongoing efforts for decarbonization by enhancing the effectiveness of energy storage solutions. A central problem within this domain focuses on the estimation of state-of-charge (SOC), pivotal for preserving battery health and averting unforeseen failures. While most methods perform well in controlled environments, deploying SOC estimation methods in industrial applications introduces significant challenges due to the inherent diversity in battery chemistry and operating conditions encountered in real-world scenarios. Current approaches often mandate extensive data gathering capabilities tailored to specific battery chemistries and operating conditions, entailing costly and time-intensive processes. These hurdles are compounded by limited access to ground truth data and the dynamic evolution of operational conditions, further complicating the viability of existing methodologies. In this study, we introduce a novel SOC estimation method that leverages regression-based unsupervised domain adaptation for cross-battery SOC estimation. Through a comprehensive comparative analysis with existing classification-based domain adaptation methods, we demonstrate the superior predictive accuracy of our approach. Our investigation also unveils trends in transfer learning capability across various conditions and methods. The findings underscore the substantial enhancements offered by the regression-based unsupervised domain adaptation method over conventional classification-based approaches in cross-battery SOC estimation.
{"title":"State-of-charge estimation across battery chemistries: A novel regression-based method and insights from unsupervised domain adaptation","authors":"M. Badfar, M. Yildirim, R.B. Chinnam","doi":"10.1016/j.jpowsour.2024.235760","DOIUrl":"10.1016/j.jpowsour.2024.235760","url":null,"abstract":"<div><div>Battery management systems play a critical role in the ongoing efforts for decarbonization by enhancing the effectiveness of energy storage solutions. A central problem within this domain focuses on the estimation of state-of-charge (SOC), pivotal for preserving battery health and averting unforeseen failures. While most methods perform well in controlled environments, deploying SOC estimation methods in industrial applications introduces significant challenges due to the inherent diversity in battery chemistry and operating conditions encountered in real-world scenarios. Current approaches often mandate extensive data gathering capabilities tailored to specific battery chemistries and operating conditions, entailing costly and time-intensive processes. These hurdles are compounded by limited access to ground truth data and the dynamic evolution of operational conditions, further complicating the viability of existing methodologies. In this study, we introduce a novel SOC estimation method that leverages regression-based unsupervised domain adaptation for cross-battery SOC estimation. Through a comprehensive comparative analysis with existing classification-based domain adaptation methods, we demonstrate the superior predictive accuracy of our approach. Our investigation also unveils trends in transfer learning capability across various conditions and methods. The findings underscore the substantial enhancements offered by the regression-based unsupervised domain adaptation method over conventional classification-based approaches in cross-battery SOC estimation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235760"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235904
Zhao Liu, Huicui Chen, Tong Zhang
Proton Exchange Membrane Fuel Cell (PEMFC) is a prominent application of hydrogen energy in fields such as mobile devices, vehicles and small-scale energy systems. This study experimentally investigates transient response of the automotive PEMFC when starting with different load under various operating conditions, which significantly influences durability. The key finding is that dynamic behavior follows a “two-stage” response mode under drier conditions. The first stage is related to the diffusion processes of cathode gas and the second stage is determined by the membrane rehydration process. Under wetter conditions, dynamic behavior exhibits a “three-stage” response mode with a larger voltage fluctuation and longer startup time. The contributors to the first two stages are the same as the “two-stage” response mode and the third stage is determined by the degree of cathode flooding. Results indicate that increasing cathode stoichiometry, cathode humidity, and temperature obviously enables PEMFC to startup more stable and faster and with a higher load. Besides, a step loading strategy with a gradually reducing magnitude achieves an optimal balance between response time and voltage fluctuation at the target load, with a moderate startup time of 9.6 s and minimal voltage fluctuation of 0.009 V.
{"title":"Analysis and optimization of dynamic response during the startup process of proton exchange membrane fuel cell","authors":"Zhao Liu, Huicui Chen, Tong Zhang","doi":"10.1016/j.jpowsour.2024.235904","DOIUrl":"10.1016/j.jpowsour.2024.235904","url":null,"abstract":"<div><div>Proton Exchange Membrane Fuel Cell (PEMFC) is a prominent application of hydrogen energy in fields such as mobile devices, vehicles and small-scale energy systems. This study experimentally investigates transient response of the automotive PEMFC when starting with different load under various operating conditions, which significantly influences durability. The key finding is that dynamic behavior follows a “two-stage” response mode under drier conditions. The first stage is related to the diffusion processes of cathode gas and the second stage is determined by the membrane rehydration process. Under wetter conditions, dynamic behavior exhibits a “three-stage” response mode with a larger voltage fluctuation and longer startup time. The contributors to the first two stages are the same as the “two-stage” response mode and the third stage is determined by the degree of cathode flooding. Results indicate that increasing cathode stoichiometry, cathode humidity, and temperature obviously enables PEMFC to startup more stable and faster and with a higher load. Besides, a step loading strategy with a gradually reducing magnitude achieves an optimal balance between response time and voltage fluctuation at the target load, with a moderate startup time of 9.6 s and minimal voltage fluctuation of 0.009 V.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235904"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235898
Zi-Yu Liu , Shuang Zhang , Ce Wang , Haisheng Chen
Zwitterionic materials have gained increased attention in electrochemical energy storage field for their particular structure containing both electronegative group and electropositive group, which gives rise to their strong water absorption, high salt solubility and other multifunctional properties. This review presents typical zwitterionic structures and components in electrochemical generators, influence on electrochemical performance improvement, applications in electrochemical energy storage. Moreover, the challenges and future expectations for zwitterionic materials are further elaborated. The diversified morphologies and constructions, a wide potential for application development of zwitterions can boost the energy science and technology in the near future.
{"title":"Zwitterionic materials in electrochemical energy storage","authors":"Zi-Yu Liu , Shuang Zhang , Ce Wang , Haisheng Chen","doi":"10.1016/j.jpowsour.2024.235898","DOIUrl":"10.1016/j.jpowsour.2024.235898","url":null,"abstract":"<div><div>Zwitterionic materials have gained increased attention in electrochemical energy storage field for their particular structure containing both electronegative group and electropositive group, which gives rise to their strong water absorption, high salt solubility and other multifunctional properties. This review presents typical zwitterionic structures and components in electrochemical generators, influence on electrochemical performance improvement, applications in electrochemical energy storage. Moreover, the challenges and future expectations for zwitterionic materials are further elaborated. The diversified morphologies and constructions, a wide potential for application development of zwitterions can boost the energy science and technology in the near future.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235898"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235935
Shunhua Guo , Yuepeng Chen , Yan Song , Wan Wang , Chuanqiang Li , Zhicong Shi , Naiguang Wang
Mg-Al-Sn series alloys have emerged as the compelling candidates for the anodes in Mg-air battery systems, attributed to their excellent discharge and corrosion performance. However, the pivotal role of Mg2Sn phase with various morphologies in these anodes has persisted underexplored. Herein, we meticulously engineer the Mg2Sn morphology by adopting solution-aging treatment, and systematically examine its effect on the discharge and corrosion behavior of Mg-Al-Sn anodes. The research demonstrates that the large-sized Mg2Sn phase and Sn-enriched dendrites in as-cast sample compromise corrosion resistance and hinder the detachment of oxidation products during discharge, thus adversely influencing anode performance. Conversely, the dissolution of Mg2Sn and dendrites, induced by solution treatment, markedly suppresses self-corrosion and improves anodic efficiencies alongside battery capacities. Moreover, the finely dispersed Mg2Sn phase, generated through aging, significantly accelerates the shedding of oxidation products during discharge, thereby enhancing the voltages of Mg-air battery. The detailed mechanism concerning the morphological impact of Mg2Sn phase is further revealed from the perspectives of micro-galvanic effect and the analysis of corroded surfaces.
{"title":"Discharge and corrosion behavior of Mg-Al-Sn anodes: An in-depth study of the morphological impact of Mg2Sn phase","authors":"Shunhua Guo , Yuepeng Chen , Yan Song , Wan Wang , Chuanqiang Li , Zhicong Shi , Naiguang Wang","doi":"10.1016/j.jpowsour.2024.235935","DOIUrl":"10.1016/j.jpowsour.2024.235935","url":null,"abstract":"<div><div>Mg-Al-Sn series alloys have emerged as the compelling candidates for the anodes in Mg-air battery systems, attributed to their excellent discharge and corrosion performance. However, the pivotal role of Mg<sub>2</sub>Sn phase with various morphologies in these anodes has persisted underexplored. Herein, we meticulously engineer the Mg<sub>2</sub>Sn morphology by adopting solution-aging treatment, and systematically examine its effect on the discharge and corrosion behavior of Mg-Al-Sn anodes. The research demonstrates that the large-sized Mg<sub>2</sub>Sn phase and Sn-enriched dendrites in as-cast sample compromise corrosion resistance and hinder the detachment of oxidation products during discharge, thus adversely influencing anode performance. Conversely, the dissolution of Mg<sub>2</sub>Sn and dendrites, induced by solution treatment, markedly suppresses self-corrosion and improves anodic efficiencies alongside battery capacities. Moreover, the finely dispersed Mg<sub>2</sub>Sn phase, generated through aging, significantly accelerates the shedding of oxidation products during discharge, thereby enhancing the voltages of Mg-air battery. The detailed mechanism concerning the morphological impact of Mg<sub>2</sub>Sn phase is further revealed from the perspectives of micro-galvanic effect and the analysis of corroded surfaces.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235935"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235917
Mengyuan Song , Haoyang Yuan , Changhao Tian , Chunguang Chen , Tao Huang , Aishui Yu
Tetraethylene glycol dimethyl ether (TEGDME) decomposition on the Au electrode surface is studied using in situ attenuated total reflectance surface enhanced infrared absorption spectroscopy (ATR-SEIRAS). Due to the weak solvation of TEGDME, the superoxide intermediate (LiO2/O2−) of the discharge process rapidly gains electrons on the electrode surface to generate Li2O2. Furthermore, alkyl radical, formed by LiO2/O2− extracting hydrogen from ether, undergoes oxidative decomposition reactions to form by-products. During the charge process, amorphous film-like Li2O2 obtained from surface-phase mechanism oxidizes in the low potential range of 3–3.4 V, while the oxidation potential of large-sized crystal Li2O2 particles obtained from solution-phase mechanism is above 3.4 V. Besides, TEGDME is intrinsically unstable and can decompose at 3.8 V even the solution is saturated with argon, indicating that the degradation of ether-based electrolyte is inevitable during the cycling process. This work confirms the feasibility of ATR-SEIRAS in probing the reaction mechanism and electrolyte stability of lithium oxygen batteries, and provides direct spectroscopic evidence for subsequent optimization of electrolyte components.
利用原位衰减全反射表面增强红外吸收光谱（ATR-SEIRAS）研究了金电极表面的四乙二醇二甲醚（TEGDME）分解。由于 TEGDME 的弱溶解性，放电过程中的超氧化物中间体（LiO2/O2-）在电极表面迅速获得电子，生成 Li2O2。此外，LiO2/O2- 从醚中萃取氢形成的烷基自由基会发生氧化分解反应，形成副产品。在充电过程中，由表面相机制得到的无定形薄膜状 Li2O2 在 3-3.4 V 的低电位范围内氧化，而由溶液相机制得到的大尺寸晶体 Li2O2 粒子的氧化电位在 3.4 V 以上。此外，TEGDME 本身并不稳定，即使溶液中的氩气达到饱和，它也能在 3.8 V 的电压下分解，这表明醚基电解质在循环过程中的降解是不可避免的。这项工作证实了 ATR-SEIRAS 在探测锂氧电池反应机理和电解液稳定性方面的可行性，并为后续优化电解液成分提供了直接的光谱证据。
{"title":"In Situ Surface-Enhanced Infrared Absorption Spectroscopy to Explore the Stability of Electrolyte in Nonaqueous Lithium Oxygen Batteries","authors":"Mengyuan Song , Haoyang Yuan , Changhao Tian , Chunguang Chen , Tao Huang , Aishui Yu","doi":"10.1016/j.jpowsour.2024.235917","DOIUrl":"10.1016/j.jpowsour.2024.235917","url":null,"abstract":"<div><div>Tetraethylene glycol dimethyl ether (TEGDME) decomposition on the Au electrode surface is studied using in situ attenuated total reflectance surface enhanced infrared absorption spectroscopy (ATR-SEIRAS). Due to the weak solvation of TEGDME, the superoxide intermediate (LiO<sub>2</sub>/O<sub>2</sub><sup>−</sup>) of the discharge process rapidly gains electrons on the electrode surface to generate Li<sub>2</sub>O<sub>2</sub>. Furthermore, alkyl radical, formed by LiO<sub>2</sub>/O<sub>2</sub><sup>−</sup> extracting hydrogen from ether, undergoes oxidative decomposition reactions to form by-products. During the charge process, amorphous film-like Li<sub>2</sub>O<sub>2</sub> obtained from surface-phase mechanism oxidizes in the low potential range of 3–3.4 V, while the oxidation potential of large-sized crystal Li<sub>2</sub>O<sub>2</sub> particles obtained from solution-phase mechanism is above 3.4 V. Besides, TEGDME is intrinsically unstable and can decompose at 3.8 V even the solution is saturated with argon, indicating that the degradation of ether-based electrolyte is inevitable during the cycling process. This work confirms the feasibility of ATR-SEIRAS in probing the reaction mechanism and electrolyte stability of lithium oxygen batteries, and provides direct spectroscopic evidence for subsequent optimization of electrolyte components.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235917"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235899
Shuangshuang Ao , Wanli Xu , Xuewen Yu , Jun Yuan , Ge Jing , Yuzuo Wang , Dianbo Ruan , Zhijun Qiao
Layered metal oxides are among the primary cathode materials used in sodium-ion batteries (SIBs), but they face limitations mainly in terms of slow reaction kinetics and structural instability with increasing cycles. Activated carbon (AC) is vital in cathode materials for SIBs. In this study, the charge transfer kinetics and reaction mechanisms of NaNi1/3Fe1/3Mn1/3O2(NFM)/AC composites were investigated. Results showed that the physical doping of AC improved the electrode wettability, provided more conducting channels for ions and reduced the ionic impedance. The addition of AC accelerated the O3–P3 transition of NFM, as observed through ex-situ X-ray diffraction and dQ/dV curves, thus reducing active material consumption during extended cycling processes. COMSOL simulations of the discharge process revealed that AC in NFM created a more homogeneous reactive material, increasing the capacity of NFM/AC composites by nearly three times at 1000 mA g−1 compared to material without AC. In addition, after 100 cycles, the cycle stability increased from 76 % to 81 %. The findings of this study provide a new way to improve the performance of cathode materials for SIBs.
{"title":"Reaction kinetics and capacity decay mechanism of NaNi1/3Fe1/3Mn1/3O2@activated carbon cathode of sodium ion batteries","authors":"Shuangshuang Ao , Wanli Xu , Xuewen Yu , Jun Yuan , Ge Jing , Yuzuo Wang , Dianbo Ruan , Zhijun Qiao","doi":"10.1016/j.jpowsour.2024.235899","DOIUrl":"10.1016/j.jpowsour.2024.235899","url":null,"abstract":"<div><div>Layered metal oxides are among the primary cathode materials used in sodium-ion batteries (SIBs), but they face limitations mainly in terms of slow reaction kinetics and structural instability with increasing cycles. Activated carbon (AC) is vital in cathode materials for SIBs. In this study, the charge transfer kinetics and reaction mechanisms of NaNi<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub>(NFM)/AC composites were investigated. Results showed that the physical doping of AC improved the electrode wettability, provided more conducting channels for ions and reduced the ionic impedance. The addition of AC accelerated the O3–P3 transition of NFM, as observed through <em>ex-situ</em> X-ray diffraction and dQ/dV curves, thus reducing active material consumption during extended cycling processes. COMSOL simulations of the discharge process revealed that AC in NFM created a more homogeneous reactive material, increasing the capacity of NFM/AC composites by nearly three times at 1000 mA g<sup>−1</sup> compared to material without AC. In addition, after 100 cycles, the cycle stability increased from 76 % to 81 %. The findings of this study provide a new way to improve the performance of cathode materials for SIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235899"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1016/j.jpowsour.2024.235834
Saakaar Bhatnagar , Andrew Comerford , Zelu Xu , Davide Berti Polato , Araz Banaeizadeh , Alessandro Ferraris
As the demand for lithium-ion batteries rapidly increases there is a need to design these cells in a safe manner to mitigate thermal runaway. Thermal runaway in batteries leads to an uncontrollable temperature rise and potentially battery fires, which is a major safety concern. Typically, when modeling the chemical kinetics of thermal runaway calorimetry data (e.g. Accelerating Rate Calorimetry (ARC)) is needed to determine the temperature-driven decomposition kinetics. Conventional methods of fitting Arrhenius Ordinary Differential Equation (ODE) thermal runaway models to ARC data make several assumptions that reduce the fidelity and generalizability of the obtained model. In this paper, Chemical Reaction Neural Networks (CRNNs) are trained to fit the kinetic parameters of N-equation Arrhenius ODEs to ARC data obtained from a Molicel 21700 P45B. The models are found to be better approximations of the experimental data. The flexibility of the method is demonstrated by experimenting with two-equation and four-equation models. Thermal runaway simulations are conducted in 3D using the obtained kinetic parameters, showing the applicability of the obtained thermal runaway models to large-scale simulations.
{"title":"Chemical Reaction Neural Networks for fitting Accelerating Rate Calorimetry data","authors":"Saakaar Bhatnagar , Andrew Comerford , Zelu Xu , Davide Berti Polato , Araz Banaeizadeh , Alessandro Ferraris","doi":"10.1016/j.jpowsour.2024.235834","DOIUrl":"10.1016/j.jpowsour.2024.235834","url":null,"abstract":"<div><div>As the demand for lithium-ion batteries rapidly increases there is a need to design these cells in a safe manner to mitigate thermal runaway. Thermal runaway in batteries leads to an uncontrollable temperature rise and potentially battery fires, which is a major safety concern. Typically, when modeling the chemical kinetics of thermal runaway calorimetry data (e.g. Accelerating Rate Calorimetry (ARC)) is needed to determine the temperature-driven decomposition kinetics. Conventional methods of fitting Arrhenius Ordinary Differential Equation (ODE) thermal runaway models to ARC data make several assumptions that reduce the fidelity and generalizability of the obtained model. In this paper, Chemical Reaction Neural Networks (CRNNs) are trained to fit the kinetic parameters of N-equation Arrhenius ODEs to ARC data obtained from a Molicel 21700 P45B. The models are found to be better approximations of the experimental data. The flexibility of the method is demonstrated by experimenting with two-equation and four-equation models. Thermal runaway simulations are conducted in 3D using the obtained kinetic parameters, showing the applicability of the obtained thermal runaway models to large-scale simulations.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"628 ","pages":"Article 235834"},"PeriodicalIF":8.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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