共价有机框架纳米膜异质连接:在灵活的微型超级电容器中,层层效应和抑制自放电储能储能
Xiaoyang Xu1, Tian Li1, Ruijuan Zhang1,2
1College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
Small (Weinheim an der Bergstrasse, Germany)
|March 27, 2025
概括
在微型超级电容器 (MSC) 中的共价有机框架 (COF) 纳米膜显示了增强的性能. 三明治型的COF异构连接改善了离子传输,减少了自放电,以获得更好的能量存储设备.
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) 纳米膜由于有序通道和主动接口,为平面微型超级电容器 (MSC) 提供了潜力.
- 通过交替堆叠,COF异质连接纳米膜结合了单个COF相的特性.
研究的目的:
- 设计三明治类型的COF异构连接,具有可控制的孔径,用于增强离子传输和减少MSC中的自放电.
- 调查立体层层和接口工程对储能性能的影响.
主要方法:
- 使用范德瓦尔斯粘接制造三明治类型的COF异质连接.
- 调整外部和内部孔径大小以控制离子 (H+) 运输和积累.
- 通过平面内 π 电子云和 π-π 电子过渡进行电子传输的分析.
主要成果:
- 最佳的MSC-COF1.0-0.6-1.0实现了高体积特异电容 (CV) 的598.6F cm-3.
- 证明了高能量密度 (40.7 mWh cm-3) 和功率密度 (2095.2 mW cm-3).
- 观察到出色的自放电特性 (长达36小时),循环稳定性和抗曲性.
结论:
- 优化的COF异质连接与受控层层和接口显著提高MSC性能.
- 该研究为开发小型和灵活的储能设备的基于COF的异质连接提供了理论指导.
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