无孔,导电的双金属协调聚合物,具有有利的电子结构,可提高法拉达电容
Yigang Jin1,2, Sha Wu1,2, Yong Sun1,2
1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. wxu@iccas.ac.cn.
Materials horizons
|July 7, 2023
概括
无孔导电协调聚合物 (c-CPs) 在超级电容器 (SCs) 中表现有前途. 双金属c-CP的CuAg4BHT提供了卓越的电容和稳定性,推进了储能解决方案.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 导电协调聚合物 (c-CPs) 是超级电容器 (SCs) 的有吸引力的电极材料,因为它们的导电性和氧化还原活性.
- 由于表面积和离子扩散途径有限,非多孔c-CPs通常被忽视为SCs.
研究的目的:
- 研究无孔导电协调聚合物 (c-CPs) 作为超级电容器 (SCs) 电池类型电极材料的潜力.
- 评估Ag5BHT和CuAg4BHT的性能,重点关注双金属单位在增强电容性质方面的作用.
主要方法:
- 非多孔c-CPs,Ag5BHT和CuAg4BHT的合成和表征.
- 材料作为超级电容器中的电极的电化学测试,包括循环电压测量,静电电荷放电和电化学阻抗光谱学.
- 组装和测试一个CuAg4BHT//AC超级电容器设备.
主要成果:
- Ag5BHT和CuAg4BHT都展示了电池类型电容器的行为,具有高的特定容量和广泛的潜在窗口.
- 与Ag5BHT相比,无孔CuAg4BHT表现出更高的特异电容 (372Fg-1在0.5Ag-1) 和更好的速率能力.
- CuAg4BHT//AC SC装置在446.1W kg-1下实现了17.1Wh kg-1的能量密度,并在5000个循环后保持了90%的电容.
结论:
- 无孔,有氧化还原活性的c-CPs,特别是那些具有像CuAg4BHT这样的双金属位点的c-CPs,是超级电容器的可行的高性能电极材料.
- 在双金属c-CP中不同金属位点之间的增强的电荷传输显著提高了电容性能.
- 这项研究突出了开发先进的基于c-CP的储能技术的有希望的途径.
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