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离子液体用于高压超级电容器

Whirang Cho¹, Christopher D Stachurski¹, Zachary G Neale²

¹Department of Chemistry, U.S. Naval Academy, Annapolis, Maryland 21402, United States.

ACS applied engineering materials

|January 1, 2026

概括

离子液体 (BILs) 为储能提供高电化学稳定性. 基于的BIL在超级电容器中表现出色,显示出高功率密度和耐用性,用于先进的电化学储能应用.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

离子液体 (BILs) 是一种新型的电解质,因其高电化学稳定性而闻名.
BIL具有很大的电压窗口,这使得它们对电化学能量存储 (EES) 设备非常有吸引力.
碳纳米泡纸 (CNFP) 被用作超级电容器中的高性能电极材料.

研究的目的:

用CNFP电极对称的双层电容器中的电解质系统评估一系列BIL.
评估基于BIL的超级电容器的电化学性能,包括电压窗口,电容,能量密度和功率密度.
研究BIL电解质在超级电容器应用中的长期稳定性和温度依赖性.

主要方法:

使用CNFP电极和各种BIL电解质组装了超级电容电池.
循环电压测量 (CV) 用于确定操作电压窗口和电容性质.
静电充放电 (GCD) 循环被用于评估电容,能量密度,功率密度和循环稳定性.

主要成果:

所有经过测试的BIL,包括,伊米达和基类型,都表现出了出色的电容性行为,几乎是矩形的CV曲线.
甲基烯替代BIL ([ (1-m-pyrr) -N111BH2 ]-TFSI) 显示出优异的离子导电性 (1.82 mS cm-1在25 °C) 和大约3.7V的广泛工作电压窗口.
超级电容器实现了显著的能量密度 (16.3 Wh kg-1 在 36.4 W kg-1 上) 和高功率密度 (高达 13.9 kW kg-1),在 1000 个循环后超过 90% 的容量保留.

结论:

离子液体显示出作为高性能超级电容器的电解质的巨大潜力.
基于的BIL,特别是甲基衍生物,提供了电离导电性,电压稳定性和能量/功率密度的有希望的组合.
超级电容器具有出色的循环耐用性和热弹性,证实了它们适用于苛刻的电化学储能应用的适用性.

关键词:

酸是一种酸.碳纳米泡的使用方法高功率密度的高功率密度.离子液体 (ILs) 是一种离子液体.超级电容器是一个超级电容器.

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