通过使用离子液体电解质来探索基于捐赠器-接受器共价有机框架的超级电容器中的电荷存储动力学
Amrita Chatterjee1, Jiamin Sun1, Kuber Singh Rawat2
1COMOC-Centre for Ordered Materials, Organometallics and Catalysis; Department of Chemistry, University of Ghent, Krijgslaan 281 (S3), Ghent, 9000, Belgium.
基于四甲 (TTF) 的共价有机框架 (COF) 在离子液体电解质中显示出增强的超级电容性能. 微孔大小和表面电荷密度是改善2D材料电荷存储的关键因素.
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:
- 联有机框架 (COF) 通常用于水性电解质中的法拉代式氧化还原伪电容器.
- 大多数研究都集中在水系统中的COF上,限制了它们的全部潜力.
研究的目的:
- 研究基于TTF的COF作为各种电解质中的对称超级电容器的电极.
- 探索非法拉第式的电化学双层电容,以提高性能和稳定性.
- 了解在离子液体电解质中的二维COF中的电荷存储机制.
主要方法:
- 制造和电化学测试两种基于TTF的捐赠-接受型COF.
- 超级电容器在水性,有机和离子液体电解质中的运行.
- 分析电荷储存机制受微孔大小和表面电荷密度的影响.
- 密度函数理论 (DFT) 计算以支持实验发现.
主要成果:
- 离子液体电解质使非法拉第电荷储存成为可能,提高了性能.
- 微孔大小和表面电荷密度极大地影响了离子液体的包装和封闭.
- 在离子液中,TFF-氨酸COF在离子液中达到130Fg-1的电容.
- TTF-胺COF在离子液体中表现出100Fg-1的电容.
结论:
- 捐赠者-接受者COF显示出在离子液体中的高性能超级电容器的巨大潜力.
- 优化微孔结构和表面电荷对于增强电化学双层电容至关重要.
- 这项研究开创了在非法拉第地区使用COF的先进技术,以实现更优质的能源存储.
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