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高速电容离子电池的异孔捐赠器-接受器共价有机框架阴极

Ju Duan¹, Likuan Teng¹, He Liu¹

¹State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.

Angewandte Chemie (International ed. in English)

|August 30, 2025

概括

通过优化离子和电子传输,新型异孔性捐赠器-接受器共价有机框架 (HDA-COF) 提高了可充电电池的性能. 这些材料为先进的储能应用提供快速充电和稳定循环.

科学领域:

材料科学
电化学
纳米技术

背景情况:

由于其定义的结构,共价有机框架 (COF) 对可充电电池具有前景.
设计具有平衡离子扩散和电子传输的高容量的COF阴极仍然是一个挑战.

研究的目的:

设计一种具有优化电子和离子导电性的新型异孔性供体-受体COF (HDA-COF).
研究HDA-COF阴极的快速充电能力和长期稳定性.

主要方法:

使用异孔性捐赠者-接受器 (D-A) 工程来创建HDA-COF.
结合实验验证和理论计算来验证导电性.
在各种充电/放电速度下测试了可充电电池的HDA-COF性能.

主要成果:

HDA-COF具有优化的电子导电性 (σ_e) 和离子导电性 (σ_ion).
经过证明的快速充电性能:104 mAh g^{-1 在5 A g^{-1 的充电时间为75秒.}}
在1000个循环中以5 A g^{-1和高放电能力 (259 mAh g^{-1在0.05 A g^{-1) 实现稳定循环.}}}

结论:

异孔D-A工程成功地优化了COF阴极中的电子和离子导电性.
对于开发高容量可充电电池来说,HDA-COF是一个有前途的途径.
这种方法为设计基于COF的先进储能材料提供了洞察力.

关键词:

共价有机框架捐赠者-接受者电子传输异孔工程离子扩散

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