关于水处理活性炭电极在电化学电容器中应用的集流体的选择

IF 5.1 4区 材料科学 Q2 ELECTROCHEMISTRY
Maria Arnaiz, Paulo Luis, Silvia Martin-Fuentes, Jon Ajuria
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引用次数: 0

摘要

电化学储能技术的电极制造通常依赖于有害的含氟化合物和有毒的有机溶剂。为了实现可持续发展目标并降低成本,迫切需要可用水加工的替代品。这些替代品可将电极加工成本减半,并减轻监管负担。虽然使用环保型粘合剂的水处理石墨电极取得了进展,但高负载活性炭(AC)电极仍面临挑战。本研究调查了改性铝集流体对水处理交流电极的影响,重点关注兼容性、可加工性和电化学性能。对各种铝箔(包括蚀刻和碳涂层类型)进行了评估。结果表明,在界面上进行改性可显著改善润湿性能和机械稳定性。电化学测试表明,由于电极部件之间的亲密接触,碳涂层铝的内阻最小,速率能力最高。相比之下,蚀刻铝箔的接触电阻更大,性能更差。老化研究表明,随着时间的推移,碳涂层铝箔能保持更好的电化学性能,因为碳层能减少降解反应和接触电阻。这些研究结果表明,均匀涂碳的铝电流收集器是大功率电化学电容器的最佳选择,可兼顾性能、可持续性和成本效益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the Selection of the Current Collector for Water Processed Activated Carbon Electrodes for their Application in Electrochemical Capacitors
Electrode manufacturing for electrochemical energy storage technologies often relies on hazardous fluorine‐containing compounds and toxic organic solvents. To align with sustainability goals and reduce costs, there is a pressing need for water‐processable alternatives. These alternatives can halve electrode processing costs and ease regulatory burdens. While progress has been made with water‐processed graphite electrodes using eco‐friendly binders, challenges persist for high‐mass loading activated carbon (AC) electrodes. This study investigates the impact of modified aluminium current collectors on water‐processed AC electrodes, focusing on compatibility, processability, and electrochemical performance. Various aluminium foils, including etched and carbon‐coated types, were evaluated. The results show that modifications at the interface significantly improve the wetting properties and mechanical stability. Electrochemical tests revealed that carbon‐coated aluminium provided the lowest internal resistance and highest rate capability due to intimate contact between the electrode components. In contrast, etched aluminium foil exhibited higher contact resistance and poorer performance. Ageing studies demonstrated that carbon‐coated foils maintained better electrochemical performance over time, as the carbon layer reduced degradation reactions and contact resistance. These findings suggest that uniformly carbon‐coated aluminium current collectors are the optimal choice for high‐power electrochemical capacitors, balancing performance, sustainability, and cost‐efficiency.
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来源期刊
CiteScore
8.60
自引率
5.30%
发文量
223
期刊介绍: Electrochemical energy storage devices play a transformative role in our societies. They have allowed the emergence of portable electronics devices, have triggered the resurgence of electric transportation and constitute key components in smart power grids. Batteries & Supercaps publishes international high-impact experimental and theoretical research on the fundamentals and applications of electrochemical energy storage. We support the scientific community to advance energy efficiency and sustainability.
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