Electrochimica Acta最新文献_第7页

Enhancing the capacitive energy storage ability of Ti3C2Tx MXene and PVA-derived carbon composite aerogels through structural disorder

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-23 DOI: 10.1016/j.electacta.2025.145910

Yuelin Lu , Jie Bai , Binbin Sun , Nannan Li , Zhenhuai Yang , Hailing Yu , Cong Wang , Cong Gu , Huan Liu , Peng Tang , Qiang Wang

MXene materials exhibit substantial energy storage capabilities owing to their high specific surface areas, tunable interlayer spacings, and excellent electrical conductivities. However, these layers are prone to re-stacking, negatively affecting the energy storage capacity of the material. Herein, through a process involving liquid nitrogen-assisted freeze-drying and subsequent annealing, Ti₃C₂T_x nanosheets were combined with polyvinyl alcohol (PVA) polymer chains via hydrogen bonding to produce MXene and PVA-derived carbon composite aerogels (MPAs) with microstructures ranging from ordered to disordered arrangements. The incorporation of PVA inhibited nanosheet stacking, and PVA carbonization enhanced the electrical conductivity of the aerogel. The carbonized aerogel (MPA2.0) exhibited a larger specific capacitance along with a more disordered and denser microstructure, thereby accounting for the increased capacitance due to enhanced ion storage in the more structurally disordered carbon nanopores. The optimized MPA aerogel demonstrated a high power density, along with an excellent specific capacitance (MPA2.0 = 348.14 F g⁻¹, 2 mV s⁻¹ scan rate), and a cycling stability of 92.52 % after 10,000 charge/discharge cycles. Furthermore, the MPA2.0-based supercapacitor obtained an impressive energy density (37.8 Wh kg⁻¹) and an exceptionally high power density (1800 W kg⁻¹) at a current density of 1 A g⁻¹. By adjusting the PVA loading, the shrinkage and stress–strain characteristics of the microstructure during freeze-drying and carbonization were altered, and the microstructural orientation of the resulting aerogels was controlled. The increased disorder in the aerogel enhanced its capacitor energy storage ability, providing a new approach for the design of multi-component high-performance hybrid supercapacitor electrodes.

MXene 材料具有高比表面积、可调的层间间隔和出色的导电性，因而具有强大的储能能力。然而，这些层容易重新堆积，从而对材料的储能能力产生负面影响。在这里，通过液氮辅助冷冻干燥和随后的退火过程，Ti3C2Tx 纳米片通过氢键与聚乙烯醇（PVA）聚合物链结合，产生了 MXene 和 PVA 衍生的碳复合气凝胶（MPAs），其微观结构从有序排列到无序排列不等。PVA 的加入抑制了纳米片的堆叠，而 PVA 的碳化增强了气凝胶的导电性。碳化后的气凝胶（MPA2.0）显示出更大的比电容以及更无序、更致密的微观结构，从而说明电容的增加是由于结构更无序的碳纳米孔中离子存储的增强。优化后的 MPA 气凝胶具有很高的功率密度和出色的比电容（MPA2.0 = 348.14 F g-1，扫描速率为 2 mV s-1），在 10,000 次充放电循环后，循环稳定性达到 92.52%。此外，基于 MPA2.0 的超级电容器在电流密度为 1 A g-1 时获得了惊人的能量密度（37.8 Wh kg-1）和超高的功率密度（1800 W kg-1）。通过调整 PVA 的负载量，改变了冷冻干燥和碳化过程中微结构的收缩和应力应变特性，并控制了所得气凝胶的微结构取向。气凝胶中无序度的增加增强了其电容器储能能力，为多组分高性能混合超级电容器电极的设计提供了一种新方法。

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引用次数: 0

Revealing the potential functionality of deep eutectic solvents as A doping electrolyte in organic electrochemical transistors

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-23 DOI: 10.1016/j.electacta.2025.145912

Hong-Yu Chou , Chia-Ying Li , Yu-Chun Huang , Chia-Hsueh Chung , Yan-Cheng Lin

Deep eutectic solvents (DESs) are widely used in various chemical synthesis and electrochemical systems; however, their application in organic electrochemical transistors (OECTs) has rarely to be reported. This study employs DESs composed of zinc chloride combined with either acetamide (DES1) or ethylene glycol (DES2), as well as DES2 solutions with additional potassium chloride, as electrolytes in OECTs using p-typed conjugated polymers (CPs), poly(3-hexylthiophene-2,5-diyl) (P3HT). Although DESs inherently have higher viscosity than aqueous electrolytes, they exhibit excellent doping efficiency as an electrolyte. This is due to the differences in ion behavior between aqueous environments and DES systems. In DES systems, the inherent hydrogen-bonding network prevents ions from existing as hydrated ions, allowing them to be more effectively doped into the CPs. As a result, OECTs with P3HT using DES2 as the electrolyte display a notable product of mobility and capacitance (μC*) of 12.9 F s⁻¹ cm⁻¹ V⁻¹, along with substantial stability performance. In addition, when KCl is added to DES2, there is a trend of decreasing solution resistance. At KCl concentrations of 1.0 and 2.0 M in DES2, the OECTs demonstrate higher μC* values (13.3 and 13.4 F s⁻¹ cm⁻¹ V⁻¹), increased volumetric capacitance (36.2 and 31.8 F cm³), and significantly improved response times (t_rise/t_fall = 10.4/0.27 and 11.2/0.33 s). In addition, the OECT operated in DES2 shows significantly enhanced stability compared to that in aqueous electrolyte. This study applies DESs to OECT devices as a doping electrolyte with extensive tunability, expanding the range of electrolytes available for OECTs.

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引用次数: 0

In-operando grazing incidence X-ray diffraction of the negative electrode in a simple lead–acid electrochemical cell during galvanostatic charge–discharge cycles

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-22 DOI: 10.1016/j.electacta.2025.145843

Diego Osmar Galeano Espinola , Fabio Santos da Silva , Rodrigo Leonardo de Oliveira Basso , José Ricardo Cezar Salgado , Fabio Plut Fernandes , Marcelo G. Hönnicke

The surface of the lead electrode in a lead–acid electrochemical cell is studied using in-operando Grazing Incidence X-ray Diffraction (GIXRD) and galvanostatic charge–discharge cycles. A specially built electrochemical cell is employed to monitor electrochemical changes on the electrode surface under operational conditions. The results demonstrate a consistent stabilization of the potential response during charge, indicating effective removal of lead sulfate. Furthermore, it was observed a significant increase in the intensity of the lead 111 diffraction peak during cleaning and a decrease of the intensity during discharge. The absence of PbSO

_{4}

diffraction peaks and the systematic decrease in the intensity of lead diffraction peaks suggest a reaction mechanism involving complex nucleation and growth of a few inhomogeneous PbSO

_{4}

monolayers. These findings reveal important details about the structural changes in the negative electrode during the charge–discharge process of a lead–acid battery.

利用操作中的冰晶入射 X 射线衍射 (GIXRD) 和电静态充放电循环对铅酸蓄电池中的铅电极表面进行了研究。采用专门制造的电化学电池来监测运行条件下电极表面的电化学变化。结果表明，充电过程中的电位响应始终保持稳定，这表明硫酸铅的去除效果显著。此外，还观察到在清洁过程中，铅 111 衍射峰的强度显著增加，而在放电过程中强度有所下降。PbSO4 衍射峰的缺失和铅衍射峰强度的系统性降低表明，反应机制涉及复杂的成核和少数不均匀 PbSO4 单层的生长。这些发现揭示了铅酸蓄电池充放电过程中负极结构变化的重要细节。

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引用次数: 0

Surface engineering-induced highly dispersed and polycrystalline structured nickel phosphide nano catalysts for lithium-sulfur batteries

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-22 DOI: 10.1016/j.electacta.2025.145892

Haoteng Wu , Haiwei Wu , Xuan Ren , Ruihua Li , Huan Wang , Wenhao Jia , Zhihua Lin , Hanbin Liu , Chuanyin Xiong , Lin Zhang

The shuttle effect and sluggish sulfur redox kinetics are the primary factors that influence the cycle life of lithium-sulfur (Li-S) batteries. Therefore, investigating electrocatalysts with a large number of active sites and high activity to improve the conversion kinetics of soluble lithium polysulfides (LiPS) is quite critical to solve these problems. In this study, surface engineering induced highly dispersible and polycrystalline structured catalyst of phosphatized nickel oxides (NiOPs) was prepared using bacterial cellulose (BNF) as a carrier and followed by partial phosphorization. Specifically, the as optimized nano NiOP-1 h (phosphating for 1 h) catalyst show an abundant polycrystalline structure of Ni₂P/Ni₅P₄ and also appropriate interaction with LiPS, which helps it greatly overperform the pristine NiO, N₂P and other partially phosphorized NiOP for enhancing the sulfur redox. The Li-S cells with paper-based NiOP-1 h electrodes can achieve a maximum capacity of 3.4 mAh cm⁻² at 0.15C, even with sulfur loading of 4 mg cm⁻² and lean electrolyte of 6.7 µL mg⁻¹. This method demonstrates the potential for preparing electrocatalysts characterized by high dispersibility and abundant active sites, offering applications in various other domains.

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引用次数: 0

Fast-response, long-cycle life and multi-color electrochromic devices of transition metal-doped potassium vanadate films

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-22 DOI: 10.1016/j.electacta.2025.145877

Xiaotong Chi, Dairong Chen, Ting Wang, Xiuling Jiao

Most multi-color electrochromic devices based on vanadate have attracted significant attention due to their low energy consumption, broad color range and visual friendliness. However, challenges such as poor cyclic stability and slow response times hinder their widespread use. In this study, we propose a novel approach to enhance the response time and cyclic stability of vanadate-based electrochromic materials by incorporating transition metal ions (Fe³⁺, Co²⁺, Ce³⁺) into potassium vanadate film (KVO film). Experimental results demonstrate that the introduction of transition metal ions stabilizes the lattice structure, enhances electrochemical processes, and facilitates the rapid ion diffusion through KVO layers in ion insertion and extraction. Additionally, a Zn²⁺/Li⁺ propylene carbonate (PC) hybrid electrolyte was prepared, which effectively prevents the dissolution of potassium vanadate film which significantly improving its electrochemical performance and cyclic stability. The electrodes in the hybrid electrolyte demonstrated three orders of magnitude accelerated zinc ion diffusion coefficients (

D_{Z n^{2 +}}

) and faster electrochromic response times: Fe-KVO (t_b/t_c = 6.1/6.6 s), Co-KVO (t_b/t_c = 8.4/4.8 s) and Ce-KVO (t_b/t_c = 6.3/7.6 s) compared with H-KVO (t_b/t_c = 21.9/7.2 s), and lower net round-trip energy consumption (both below 90 mWh m⁻²). All vanadate film electrodes sustain their performance over 1000 cycles. The device's color variations under different applied potentials, such as green, olive green, yellow, light brown, amber, and orange-red. These findings highlight the potential of transition metal ion doping to enhance properties of vanadate films, paving the way for their broader application in multi-color electrochromic devices.

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引用次数: 0

Lithophilic SnO2-reinforced carbon fiber-based composite anode for high-performance lithium metal batteries

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-22 DOI: 10.1016/j.electacta.2025.145908

Ting Liu , Hao Xu , Shuai Liu , Weimin Wang , Kaikai Song , Lina Hu

Lithium metal batteries are among the most promising energy storage systems due to the high energy density. However, its practical application is hindered by growing lithium dendrite and unstable solid electrolyte interphase. Three-dimensional conductive collectors have been widely proposed to solve the above problems, while their lithophobic behavior has no favorable effect on lithium plating/stripping. Composite anode (CF@SnO₂–1.0@Li) with homogeneous SnO₂ lithophilic sites are prepared, the lithium nucleation barrier is lowered through SnO₂, and homogeneous deposition of lithium ions is induced, and consequently the growth of lithium dendrites and the formation of “dead Li” are suppressed. The CF@SnO₂–1.0@Li symmetrical cells can stable cycle for more than 2200 h at 1 mA cm⁻² and 1 mAh cm⁻². The assembled LiFePO₄ full cell exhibits a high initial discharge capacity of 145.1 mAh g⁻¹ and a high capacity retention rate of 94.3% after 300 cycles at 1 C. Similarly, the assembled LiCoO₂ full cell shows outstanding rate performance and cycling stability. This study provides a new strategy for the development of ultrastable lithium metal batteries.

{"title":"Lithophilic SnO2-reinforced carbon fiber-based composite anode for high-performance lithium metal batteries","authors":"Ting Liu , Hao Xu , Shuai Liu , Weimin Wang , Kaikai Song , Lina Hu","doi":"10.1016/j.electacta.2025.145908","DOIUrl":"10.1016/j.electacta.2025.145908","url":null,"abstract":"<div><div>Lithium metal batteries are among the most promising energy storage systems due to the high energy density. However, its practical application is hindered by growing lithium dendrite and unstable solid electrolyte interphase. Three-dimensional conductive collectors have been widely proposed to solve the above problems, while their lithophobic behavior has no favorable effect on lithium plating/stripping. Composite anode (CF@SnO<sub>2</sub>–1.0@Li) with homogeneous SnO<sub>2</sub> lithophilic sites are prepared, the lithium nucleation barrier is lowered through SnO<sub>2</sub>, and homogeneous deposition of lithium ions is induced, and consequently the growth of lithium dendrites and the formation of “dead Li” are suppressed. The CF@SnO<sub>2</sub>–1.0@Li symmetrical cells can stable cycle for more than 2200 h at 1 mA cm<sup>−2</sup> and 1 mAh cm<sup>−2</sup>. The assembled LiFePO<sub>4</sub> full cell exhibits a high initial discharge capacity of 145.1 mAh g<sup>−1</sup> and a high capacity retention rate of 94.3% after 300 cycles at 1 C. Similarly, the assembled LiCoO<sub>2</sub> full cell shows outstanding rate performance and cycling stability. This study provides a new strategy for the development of ultrastable lithium metal batteries.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"521 ","pages":"Article 145908"},"PeriodicalIF":5.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143470930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Li-S battery performance by harnessing the power of single atoms on 2D borophene 利用二维硼吩上单原子的能量提高锂电池性能

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-22 DOI: 10.1016/j.electacta.2025.145831

Normurot Fayzullaev , Mitra Keshavarz , Mohammad Omidi , Sharifjon Rakhimov , Rakhnamokhon Nazirova , Sura Mohammad Mohealdeen , HassabAlla M.A. Mahmoud , Maadh Fawzi Nassar , Monireh Faraji

Li-S batteries, with their high energy density and low cost, hold promise for green energy applications Nonetheless, their practical performance falls short of theoretical predictions due to the sluggish redox kinetics of lithium polysulfides (LiPS). Although attempts have been made to address volumetric expansion and enhance conductivity via porous scaffolds, considerable obstacles persist. Single-atom catalysts (SACs) represent a promising approach, facilitating atomic-level engineering and accurate characterization of reaction intermediates, thereby providing pathways to surmount these challenges. Inspired by the single-atom catalysis approach, we designed an innovative electrocatalyst including FeN₄ single-atom active sites anchored to 2D borophene nanosheets. The significant electronic coupling between Fe 3d and S 2p orbitals promotes charge transfer and improves the redox dynamics of lithium polysulfide intermediates. Moreover, the unique properties of 2D borophene, including its low volumetric mass density, superior electrical conductivity, rapid Li-ion transport, and robust binding energy with polysulfides, render it a promising choice for Li-S battery materials. The synergistic effect of robust polysulfide adsorption by 2D borophene and improved redox kinetics, enabled by the unique electronic configuration and three-dimensional architecture of FeN₄/borophene (Fe@BNS), results in outstanding electrochemical performance in Li-S batteries. The fabricated Li-S cells exhibit exceptional long-term cycle life (1180 mAh g⁻¹ at 1 C for 1000 cycles) and outstanding high-rate charge-discharge performance (790.3 mAh g⁻¹ at 1 C) with a significant sulfur loading of 6.5 mg cm⁻².

{"title":"Enhancing Li-S battery performance by harnessing the power of single atoms on 2D borophene","authors":"Normurot Fayzullaev , Mitra Keshavarz , Mohammad Omidi , Sharifjon Rakhimov , Rakhnamokhon Nazirova , Sura Mohammad Mohealdeen , HassabAlla M.A. Mahmoud , Maadh Fawzi Nassar , Monireh Faraji","doi":"10.1016/j.electacta.2025.145831","DOIUrl":"10.1016/j.electacta.2025.145831","url":null,"abstract":"<div><div>Li-S batteries, with their high energy density and low cost, hold promise for green energy applications Nonetheless, their practical performance falls short of theoretical predictions due to the sluggish redox kinetics of lithium polysulfides (LiPS). Although attempts have been made to address volumetric expansion and enhance conductivity via porous scaffolds, considerable obstacles persist. Single-atom catalysts (SACs) represent a promising approach, facilitating atomic-level engineering and accurate characterization of reaction intermediates, thereby providing pathways to surmount these challenges. Inspired by the single-atom catalysis approach, we designed an innovative electrocatalyst including FeN<sub>4</sub> single-atom active sites anchored to 2D borophene nanosheets. The significant electronic coupling between Fe 3d and S 2p orbitals promotes charge transfer and improves the redox dynamics of lithium polysulfide intermediates. Moreover, the unique properties of 2D borophene, including its low volumetric mass density, superior electrical conductivity, rapid Li-ion transport, and robust binding energy with polysulfides, render it a promising choice for Li-S battery materials. The synergistic effect of robust polysulfide adsorption by 2D borophene and improved redox kinetics, enabled by the unique electronic configuration and three-dimensional architecture of FeN<sub>4</sub>/borophene (Fe@BNS), results in outstanding electrochemical performance in Li-S batteries. The fabricated Li-S cells exhibit exceptional long-term cycle life (1180 mAh g⁻¹ at 1 C for 1000 cycles) and outstanding high-rate charge-discharge performance (790.3 mAh g⁻¹ at 1 C) with a significant sulfur loading of 6.5 mg cm⁻².</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"521 ","pages":"Article 145831"},"PeriodicalIF":5.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143470954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical assembly of 3-methoxycatechol and catechol on 1-Aminopyrene-functionalized carbon nanotubes for efficient NADH and glucose biosensing

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-21 DOI: 10.1016/j.electacta.2025.145906

Amanda Leda, Patrycja Płócienniczak-Bywalska, Grzegorz Milczarek, Tomasz Rębiś

This study presents a novel electrochemical platform for efficient detection of NADH and glucose using multi-walled carbon nanotubes (MWCNTs) functionalized with 1-aminopyrene (1-AP) and catechol derivatives. The two-step functionalization process, involving π-π stacking of 1-AP followed by electrochemical assembly of catechol (Cat) and 3-methoxycatechol (3-MCat), enhances the electrocatalytic activity of the electrode surface. The optimized GC/MWCNT/1-AP/Cat electrode demonstrated excellent performance for NADH detection, achieving a detection limit of 1.98 μM at + 0.1 V. Further, the glucose biosensor, based on glucose dehydrogenase (GDH) immobilization, exhibited a detection limit of 0.166 mM with high stability and sensitivity. The proposed platform offers a robust and versatile solution for biosensing applications, showing significant potential in medical diagnostics and biochemical analysis.

引用次数: 0

Nanodiamond-assisted synthesis of microporous carbon sphere as a composite anode for promoting the performances of lithium-ion battery

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-21 DOI: 10.1016/j.electacta.2025.145904

Mingxing Jiao , Zhihe Li , Yuanhang Wang , Tianrun Hou , Zhuo Li , Songyang Qian , Jianping Zhang , Xiaochen Sun , Junsong Liu

Lithium-ion batteries (LIBs) have revolutionized the field of energy storage due to their high energy density, long cycle life, and environmental friendliness. One crucial factor that determines the performance of LIBs is the choice of anode materials, especially those with high cost-effectiveness, electrochemical performances, and cyclic stability. In this work, the attention towards utilizing biomass-derived carbon materials as potential candidates for anodes, and chestnut shell-derived porous carbon sphere embedded with Nanodiamond (ND) named CPCS-ND is prepared, realizing exceptional capacity and cycle stability (625 mA h g^-1 after 100 cycles at 0.2 C and 254 mA h g^-1 after 3000 cycles at 5 C (1 C∼372 mA g^-1)) as anode material in LIBs. It is experimentally demonstrated that the outstanding electrochemical performances are attributed to the unique microporous spherical structure of CPCS-ND, which is helpful for the improvements in the diffusion and storage of Li-ions and providing a sufficient surface for effective electrode/electrolyte interactions. Meanwhile, the introduced NDs with high Li-ion adsorption increases the pseudocapacitance of the anode materials. This work highlights the importance of the structural design of biochar, which not only offers new possibilities for sustainable and eco-friendly battery technologies but also opens up avenues for utilizing agricultural waste products effectively.

{"title":"Nanodiamond-assisted synthesis of microporous carbon sphere as a composite anode for promoting the performances of lithium-ion battery","authors":"Mingxing Jiao , Zhihe Li , Yuanhang Wang , Tianrun Hou , Zhuo Li , Songyang Qian , Jianping Zhang , Xiaochen Sun , Junsong Liu","doi":"10.1016/j.electacta.2025.145904","DOIUrl":"10.1016/j.electacta.2025.145904","url":null,"abstract":"<div><div>Lithium-ion batteries (LIBs) have revolutionized the field of energy storage due to their high energy density, long cycle life, and environmental friendliness. One crucial factor that determines the performance of LIBs is the choice of anode materials, especially those with high cost-effectiveness, electrochemical performances, and cyclic stability. In this work, the attention towards utilizing biomass-derived carbon materials as potential candidates for anodes, and chestnut shell-derived porous carbon sphere embedded with Nanodiamond (ND) named CPCS-ND is prepared, realizing exceptional capacity and cycle stability (625 mA h g<sup>-1</sup> after 100 cycles at 0.2 C and 254 mA h g<sup>-1</sup> after 3000 cycles at 5 C (1 C∼372 mA g<sup>-1</sup>)) as anode material in LIBs. It is experimentally demonstrated that the outstanding electrochemical performances are attributed to the unique microporous spherical structure of CPCS-ND, which is helpful for the improvements in the diffusion and storage of Li-ions and providing a sufficient surface for effective electrode/electrolyte interactions. Meanwhile, the introduced NDs with high Li-ion adsorption increases the pseudocapacitance of the anode materials. This work highlights the importance of the structural design of biochar, which not only offers new possibilities for sustainable and eco-friendly battery technologies but also opens up avenues for utilizing agricultural waste products effectively.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"521 ","pages":"Article 145904"},"PeriodicalIF":5.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile fabrication of copper-based metal-organic-framework/graphene hybrid supported on highly stretchable wooden substrate for in-plane micro-supercapacitor with potential applications as wearable devices

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta

Pub Date : 2025-02-21 DOI: 10.1016/j.electacta.2025.145905

Elham Soroush , Seyed Ali Zargar , Reza Ahadi Dolatsara , Adrine Malek Khachatourian , Mohammad Golmohammad

The rise in demand for flexible power sources in the application of portable and wearable devices has highlighted the importance of micro-supercapacitors (MSCs) due to their preferred features, including high power density and ultrastability. Although a wide range of active materials is available, developing cost-effective fabrication methods using flexible substrates and innovative materials is still challenging. In this work, in-plane interdigitated MSCs were developed using exfoliated graphene oxide (EGO) and a Cu-based metal-organic framework (Cu-MOF) hybrid by a facile stamping method on a flexible wood substrate. This was followed by a reduction state of EGO by nascent hydrogen. The flexible substrate was created through lignin modification and infiltration of Balsa wood sheet. The hybrid material with an equal weight percentage of Cu-MOF and EGO demonstrated significant electrochemical performance, which is explained by the synergistic interaction between the hybrid's components, resulting from the porous structure and high surface area of Cu-MOF along with plentiful active sites and electrical conductivity offered by EGO. The fabricated MSC of the hybrid material exhibited suitable areal capacitance and energy density of 5.75 mF cm^-2 and 0.798 µWh cm^-2, respectively, at a current density of 0.09 mA cm^-2. Moreover, it also showed an outstanding capacitance retention of 93 % after 2000 cycles. The results indicate that the MSC, prepared from the hybrid with the same ratio of each component, has the potential to serve as an efficient energy storage device for wearable and flexible miniaturized applications.

{"title":"Facile fabrication of copper-based metal-organic-framework/graphene hybrid supported on highly stretchable wooden substrate for in-plane micro-supercapacitor with potential applications as wearable devices","authors":"Elham Soroush , Seyed Ali Zargar , Reza Ahadi Dolatsara , Adrine Malek Khachatourian , Mohammad Golmohammad","doi":"10.1016/j.electacta.2025.145905","DOIUrl":"10.1016/j.electacta.2025.145905","url":null,"abstract":"<div><div>The rise in demand for flexible power sources in the application of portable and wearable devices has highlighted the importance of micro-supercapacitors (MSCs) due to their preferred features, including high power density and ultrastability. Although a wide range of active materials is available, developing cost-effective fabrication methods using flexible substrates and innovative materials is still challenging. In this work, in-plane interdigitated MSCs were developed using exfoliated graphene oxide (EGO) and a Cu-based metal-organic framework (Cu-MOF) hybrid by a facile stamping method on a flexible wood substrate. This was followed by a reduction state of EGO by nascent hydrogen. The flexible substrate was created through lignin modification and infiltration of Balsa wood sheet. The hybrid material with an equal weight percentage of Cu-MOF and EGO demonstrated significant electrochemical performance, which is explained by the synergistic interaction between the hybrid's components, resulting from the porous structure and high surface area of Cu-MOF along with plentiful active sites and electrical conductivity offered by EGO. The fabricated MSC of the hybrid material exhibited suitable areal capacitance and energy density of 5.75 mF cm<sup>-2</sup> and 0.798 µWh cm<sup>-2</sup>, respectively, at a current density of 0.09 mA cm<sup>-2</sup>. Moreover, it also showed an outstanding capacitance retention of 93 % after 2000 cycles. The results indicate that the MSC, prepared from the hybrid with the same ratio of each component, has the potential to serve as an efficient energy storage device for wearable and flexible miniaturized applications.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"521 ","pages":"Article 145905"},"PeriodicalIF":5.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0