对于先进的-有机电池而言,还氧-双极共价有机框架阴极
Linqi Cheng1, Xiaoli Yan2, Jie Yu1
1Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 12, 2024
概括
一种新的氧化还原双极共价有机框架 (COF) 材料TPAD-COF被开发为离子电池 (SIB) 的阴极. 这种材料表现出高容量,卓越的循环稳定性和良好的低温性能.
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:
- 氧化还原活性共价有机框架 (COFs) 对离子电池 (SIBs) 显示出前景.
- 在SIB中开发用于同时存储阴离子和阴离子的双极COF仍然是一个挑战.
- 现有的阴极材料往往缺乏足够的导电性和长期稳定性.
研究的目的:
- 为SIB阴极开发一种新的氧化还原双极COF材料.
- 为了研究新的COF材料的电化学特性和性能.
- 为了证明这种COF在全有机SIB中的潜力.
主要方法:
- 从与氨酸融合的化单位合成一个氧化解复极COF (TPAD-COF).
- 描述TPAD-COF的结构和电化学特性.
- 使用TPAD-COF作为阴极的SIB和全有机SIB (AOSIB) 的组装和测试.
主要成果:
- 由于TPAD-COF具有集成的林和子结构,具有高的离子/电导率和丰富的氧化还原活性位点.
- TPAD-COF阴极在0.05 A g-1下实现了186.4 mAh g-1的特定容量,并在2000个周期内在1.0 A g-1下实现了卓越的循环稳定性,且衰变速率低.
- 在-20°C下保持了101mAhg-1的显著容量.
- 用TPAD-COF阴极组装的全有机SIB显示了令人印象深刻的电化学性能.
结论:
- TPAD-COF是SIB的有希望的新阴极材料,提供高性能和稳定性.
- 碳酸的合理分子设计可以导致可充电电池的先进材料.
- 这项工作为开发高性能COF基阴极开辟了新的途径.
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