高稳定 Sp2 联合氧活性共价有机框架用于伪容量储能器
Kushagra Yadav1,2, Rimjhim Yadav1,2, Praveen K Budakoti3
1Advanced Carbon Products and Metrology Department, CSIR-National Physical Laboratory (CSIR-NPL), New Delhi, 110012, India.
Chemistry (Weinheim an der Bergstrasse, Germany)
|June 26, 2025
概括
氧化还原活性共价有机框架 (COF) 在超级电容器应用中表现出特殊的储能能力和显著的循环稳定性. 这种新型材料设计为先进的电化学储能解决方案提供了一个有前途的途径.
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:
- 有氧还原活性单元的共价有机框架 (COF) 对电化学能量存储具有前景.
- 开发高效和稳定的电极材料对于超级电容器至关重要.
研究的目的:
- 为高性能超级电容器合成和表征一种新的氧化还原活性COF.
- 研究合成的COF的电化学特性和电荷储存机制.
主要方法:
- 从p-phenylenediamine (PPDA) 和2,4,6-tris-(p-formylphenoxy) -1,3,5-triazine (TFPT) 单体中合成PPDA-TFPT-COF的船基凝结合成.
- 电化学表征包括特定电容,能量密度,功率密度和循环稳定性测量.
- 密度函数理论 (DFT) 计算来分析电子结构和电荷流动性.
主要成果:
- 合成的PPDA-TFPT-COF实现了250 F g-1的最大特异电容和34.72 Wh kg-1.1的能量密度.
- 观察到非同寻常的循环稳定性,在7A g-1.1的5000个循环后保持超过100%的电容.
- DFT计算证实了扩展的π-结合,阐明了有效的电荷传输和存储机制.
结论:
- 作为超级电容电极材料,PPDA-TFPT-COF表现出卓越的性能,这是由于其氧化还原活性位点和高效的电荷传输.
- 该研究提出了一种新的策略,用于设计用于高性能伪容量储能的氧化还原活性COF.
- 该材料的增强导电性和离子储存能力有助于其卓越的电化学性能.
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