ChemElectroChem最新文献_第5页

Application of Electrochemical Impedance Spectroscopy for Diagnostics in Fuel Cells, Electrolyzers, and Batteries 电化学阻抗谱在燃料电池、电解槽和电池诊断中的应用

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-08 DOI: 10.1002/celc.202500005

Chanho Kim, Inyoung Jang

{"title":"Application of Electrochemical Impedance Spectroscopy for Diagnostics in Fuel Cells, Electrolyzers, and Batteries","authors":"Chanho Kim, Inyoung Jang","doi":"10.1002/celc.202500005","DOIUrl":"https://doi.org/10.1002/celc.202500005","url":null,"abstract":"With global energy demand increasing alongside population growth, the importance of efficient, clean energy conversion systems like fuel cells and batteries intensifies. Fuel cells are recognized for their ability to generate electricity from hydrogen and oxygen, with water as the only byproduct, and can also function in reverse as energy storage systems by producing hydrogen. Batteries chemically store energy and enable zero-carbon emissions through their closed-loop functionality. As demand grows, electrochemical impedance spectroscopy (EIS) is more actively used for investigating various electrochemical and physicochemical properties within electrochemical systems. Furthermore, EIS can serve as an in situ analysis method during operation, making it even more impactful in the near future. This article reviews the studies and applications of EIS, an advanced technique that provides insights into the electrochemical reaction at the interfaces and charge transfer processes within these systems. In addition, it provides an overview of the electrochemical principles governing these technologies, with a focus on the distinct roles and mechanisms of their components. The review offers a deeper understanding of EIS applications for studying electrochemical performance and physicochemical properties while also covering advancements in state-of-the-art technologies for fuel cells, electrolyzers, and batteries.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 11","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fe7S8 Nanoparticles Embedded in Sulfur–Nitrogen Codoped Carbon Nanotubes: A High-Performance Anode Material for Lithium-Ion Batteries with Multilevel Confinement Structure 硫氮共掺杂碳纳米管中嵌入的Fe7S8纳米颗粒：一种高性能多级约束结构锂离子电池负极材料

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-08 DOI: 10.1002/celc.202500066

Xingyun Zhao, Mingzhu Wang, Shuyu Yue, Yaoyan Wu, Yaohui Zhang, Yaqian Dong, Tiehua Ma

{"title":"Fe7S8 Nanoparticles Embedded in Sulfur–Nitrogen Codoped Carbon Nanotubes: A High-Performance Anode Material for Lithium-Ion Batteries with Multilevel Confinement Structure","authors":"Xingyun Zhao, Mingzhu Wang, Shuyu Yue, Yaoyan Wu, Yaohui Zhang, Yaqian Dong, Tiehua Ma","doi":"10.1002/celc.202500066","DOIUrl":"https://doi.org/10.1002/celc.202500066","url":null,"abstract":"Fe7S8 nanoparticle-embedded sulfur–nitrogen codoped carbon nanotube composite (Fe7S8@CT-NS) has been successfully designed as a high-performance anode material for lithium-ion batteries through a multistage confinement strategy. Constructed with a nitrogen-doped carbon nanotube framework derived from melamine and a sulfurization process controlled via a polydopamine (PDA) intermediate layer, this composite features FeSC covalent bonding at the interface and a hierarchical porous structure. This multilevel confinement strategy integrates physical encapsulation within a nitrogen–sulfur codoped carbon framework and chemical stabilization via FeSC covalent bonding to synergistically enhance electrochemical performances. Electrochemical performance tests show that Fe7S8@CT-NS retains a capacity of 527.9 mAh g−1 after 1000 cycles at a high current density of 5 A g−1, demonstrating excellent reversibility and high-rate performance across a wide current density range. This material, with its unique structural confinement, chemical bonding, and functional synergy, provides new insights into the development of high-stability, high-power lithium-ion battery anode materials.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 13","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500066","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic Additives Design for High-Voltage and Broad-Temperature Propylene Carbonate-Based Electrolytes in Practical Lithium-Ion Batteries 实用锂离子电池中高压、宽温碳酸丙酯基电解质的协同添加剂设计

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-06 DOI: 10.1002/celc.202500020

Qijun Liu, Changjun Tuo, Mingsheng Qin, Jun Yang, Ziqi Zeng, Shijie Cheng, Jia Xie

{"title":"Synergistic Additives Design for High-Voltage and Broad-Temperature Propylene Carbonate-Based Electrolytes in Practical Lithium-Ion Batteries","authors":"Qijun Liu, Changjun Tuo, Mingsheng Qin, Jun Yang, Ziqi Zeng, Shijie Cheng, Jia Xie","doi":"10.1002/celc.202500020","DOIUrl":"https://doi.org/10.1002/celc.202500020","url":null,"abstract":"Lithium-ion batteries (LIBs), widely used in electric vehicles (EVs) and other applications, are increasingly expected to deliver higher energy densities and stable performance over a wide temperature range, posing stringent challenges for advanced electrolyte design. However, achieving these properties remains challenging with currently commercialized ethylene carbonate (EC)-based electrolytes. Herein, a propylene carbonate (PC)-based electrolyte system is reported, employing hexafluorobenzene (HFB) and fluoroethylene carbonate (FEC) as synergistic additives. Specifically, HFB facilitates compatibility with graphite anodes through selective interfacial adsorption, while the decomposition of FEC stabilizes the solid electrolyte interphase (SEI), mitigating the formation of high-impedance interfaces. This tailored electrolyte exhibits superior ionic conductivity, excellent oxidative stability, and broad temperature tolerance. When validated at 4.5 V, high-loading NCM811/graphite cells achieve nearly full capacity over 100 cycles at low temperatures (−20 °C), with pouch cells retaining 80% of their capacity after 470 cycles. These findings underscore the effectiveness of strategic additive engineering in advancing the development of PC-based electrolytes for practical LIBs.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 12","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical Methylthiolation of Terminal Alkynes Using Dimethyl Sulfoxide 二甲基亚砜催化末端炔的电化学甲基硫代化

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-06 DOI: 10.1002/celc.202500063

Tianci Chen, Xiaoxiao Chen, Mingming Yu, Chuan-Ying Li

引用次数: 0

Exploring Electrodeposition of Copper Oxide Nanomaterials and Self-Assembled Monolayer Formation from Aliphatic and Aromatic Thiols 电沉积氧化铜纳米材料及脂肪族和芳香族硫醇自组装单层的探索

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-06 DOI: 10.1002/celc.202500003

Mark A. Buckingham, Yi Li, Ben F. Spencer, Sarah Wall, Allan Mathews, David J. Lewis

{"title":"Exploring Electrodeposition of Copper Oxide Nanomaterials and Self-Assembled Monolayer Formation from Aliphatic and Aromatic Thiols","authors":"Mark A. Buckingham, Yi Li, Ben F. Spencer, Sarah Wall, Allan Mathews, David J. Lewis","doi":"10.1002/celc.202500003","DOIUrl":"https://doi.org/10.1002/celc.202500003","url":null,"abstract":"The superhydrophobic modification of Cu2O electrodes has shown great promise in enhancing CO2 reduction due to the formation of a triple phase boundary at the surface, allowing high concentrations of CO2, which is not achievable in typical aqueous media. Herein, a two-step study is undertaken to investigate and optimize hydrophobic modification of electrodeposited Cu2O nanomaterial electrodes. First, the electrochemical deposition potentials are altered in equivalent electrolyte conditions, which is found to alter the size of the deposited nanomaterials and the corresponding electrode surface roughness. Second, the electrodes are soaked in thiol-containing solutions containing a range of both aromatic and aliphatic thiols to achieve chemically modified self-assembled monolayers (SAMs) on the electrode surfaces. The surface and morphological properties of the electrodeposited electrodes are assessed with scanning electron microscopy, laser confocal, and atomic force microscopy (AFM) imaging. Confocal and AFM also allow the determination of the surface roughness of the electrodes at both the microscale and the nanoscale. The presence of SAM-modification is determined by X-ray photoelectron spectroscopy, and water contact angles are also measured on the nonthiol-modified and thiol-modified electrodes, and the contact angle is found to increase from 70°–100° to 130°–140°, close to superhydrophobic levels of contact angles.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 11","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Front Cover: Synergetic Interlayer in Li-S Batteries: Polysulfide-Impeding Effect of Conductive Carbon Cloth Supporting Topological-Phase Bi2Se3 (ChemElectroChem 9/2025) 前盖：Li-S电池中的协同中间层：导电碳布支持拓扑相Bi2Se3的多硫化物阻碍效应（ChemElectroChem 9/2025）

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-05 DOI: 10.1002/celc.202580901

Heng Wang, Huichao Dong, Ting Kan, Hewei Luo, Ji Yan, Hirofumi Yoshikawa

引用次数: 0

Facilitating Electroactive Site Density Determination during Fuel-Cell Testing 促进燃料电池测试中电活性位点密度的测定

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-05-01 DOI: 10.1002/celc.202500036

Rifael Z. Snitkoff-Sol, Lior Elbaz

引用次数: 0

Enhancing Oxygen Evolution Reaction Activity through Linker Functionalization in Manganese-Based Metal-Organic Frameworks (Mn-MOFs) 锰基金属-有机骨架（Mn-MOFs）中连接器功能化提高析氧反应活性

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-04-30 DOI: 10.1002/celc.202400704

Arslan Akbar, Irfan Ullah, Salman Noshear Arshad, Muhammad Zaheer

{"title":"Enhancing Oxygen Evolution Reaction Activity through Linker Functionalization in Manganese-Based Metal-Organic Frameworks (Mn-MOFs)","authors":"Arslan Akbar, Irfan Ullah, Salman Noshear Arshad, Muhammad Zaheer","doi":"10.1002/celc.202400704","DOIUrl":"https://doi.org/10.1002/celc.202400704","url":null,"abstract":"Developing efficient and durable electrocatalysts for oxygen evolution reaction (OER) remains a critical bottleneck for economic and large-scale production of green hydrogen. Metal-organic frameworks (MOFs) with their unique structural tunability, redox properties, and high surface area have emerged as promising candidates for the OER process. In this work, a presentation on how linker functionalization in rather unexplored manganese-based MOFs leads to enhanced OER activity is given. A series of manganese-based MOFs in rarely reported MIL-88B structure (Mn-MIL-88-X) is synthesized using functionalized linkers [X = NH2, NO2, Br]. The objective is to modulate the electronic structure and hydrophilicity of the MOFs leading to enhanced OER activity. Among functionalized MOFs, Mn-MIL-88-NH2 shows remarkable performance, requiring only 260 mV of overpotential to reach a current density of 10 mA cm−2 and a small Tafel slope of 73 mV dec−1. The improvement in OER activity of Mn-MIL-88-NH2 is ascribed to the higher oxidation states of manganese (Mn3+/Mn4+) and the presence of the amino group (-NH2) as confirmed through X-ray photoelectron spectroscopy (XPS). This work paves the way for the designing and exploring of mixed-valence state metal-based MOFs as advanced electrode materials for electrocatalysis.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 10","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202400704","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Advances in Polymer Interlayers for Zinc Metal Anode Protection-A Mini-Review 用于锌金属阳极保护的聚合物中间层研究进展

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-04-29 DOI: 10.1002/celc.202400692

Yamei Luo, Lanya Zhao, Dandan Yin, Peng Yang, Yongxian Zhang, Xiaowei Liu, Shujiang Ding, Hongyang Zhao

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Studying the Ingress of Ag Nanoparticles into Imprinted Nanocavities by Nanoimpact Electrochemistry 纳米冲击电化学研究银纳米颗粒进入印迹纳米空腔

IF 3.5 4区化学

ChemElectroChem Pub Date : 2025-04-28 DOI: 10.1002/celc.202500022

Hila Sagi-Cohen, Pavel Savchenko, Daniel Mandler

引用次数: 0