在纳米孔碳中,电解质对乱增强电容的影响
Xinyu Liu1, Kara Fong1, Zhaohan Shen2
1Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
概括
纳米孔状碳的电容主要是由结构障碍和离子吸附驱动的,而不是电解质类型. 这一发现适用于各种离子液体和有机电解质,指导超级电容器电极设计.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 纳米多孔碳中的电容受孔结构和表面功能的影响.
- 电解质化学对干扰驱动和离子吸附电容的影响尚不清楚.
研究的目的:
- 通过使用离子液体电解质,研究纳米多孔碳中的电容和结构秩序之间的关系.
- 确定干扰驱动电容及其机制的一般性.
- 探索电解质化学在电容中的作用.
主要方法:
- 研究了20个具有不同程度结构秩序的纳米孔碳.
- 使用的离子液体电解质,特别是1-乙基-3-甲基利米达四甲酸 (EMIBF4).
- 结果与先前使用1M四乙烯四二酸 (TEABF4) 在乙二 (ACN) 中的研究进行了比较.
主要成果:
- 碳具有较小的石墨烯样域和较高的离子吸附能力,显示电容增加.
- 当毛孔可访问时,容量在不同的离子液体和有机电解质中保持一致.
- 干扰驱动和吸附依赖的电容是纳米多孔碳中的一般现象.
结论:
- 电解质化学对纳米多孔碳的电容有有限的影响.
- 结构障碍和离子吸附是决定电容性的关键因素.
- 缺陷性质和量子电容可能会影响干扰驱动电容,帮助超级电容电极设计.
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