具有三重活性中心的二维 π-d 结合导电金属有机框架作为灵活电池的高性能阴极
Hong Ding1, Ping Liu1, Chengyu Liu1
1School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China.
ChemSusChem
|November 16, 2024
概括
我们为高性能离子电池 (ZIB) 开发了一种新的2D铜导电金属有机框架 (C-MOF). 这种材料表现出异常的容量,稳定性和灵活性,为先进的储能解决方案铺平了道路.
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:
- 导电金属有机框架 (C-MOFs) 对于高性能离子电池 (ZIBs) 是有前途的,因为它们的多氧化还原点和导电性.
- 在水性电解质中的C-MOF稳定性仍然存在挑战,影响电池性能和寿命.
研究的目的:
- 合成和描述一种新的2D C-MOF,2D Cu-TABQ,用于ZIB中的阴极材料.
- 研究2D Cu-TABQ阴极的电化学性能和稳定性,特别是在柔性ZIB中.
- 通过使用凝电解质来解决C-MOF中电解质引起的不稳定性问题.
主要方法:
- 2,3,5,6-四氨基诺 (TABQ) 连接物与Cu2+离子的协调,形成2D Cu-TABQ C-MOF.
- 使用常见电解质和凝电解质,对2D Cu-TABQ作为ZIB中的阴极进行电化学测试.
- 使用2D Cu-TABQ阴极和凝电解质制造和测试柔性ZIB.
主要成果:
- 2D Cu-TABQ 阴极在0.2 A g-1 时表现出297.7 mAh g-1 的超高可逆容量和卓越的循环稳定性 (98.2 mAh g-1 在2.0 A g-1 1000 个循环后).
- 与普通电解质相比,使用凝电解质显著抑制了穿效应,改善了循环稳定性.
- 用2D Cu-TABQ组装的柔性ZIB显示出出色的容量保留 (经过50个循环后64.4%) 和抗曲性.
结论:
- 开发的2D Cu-TABQ C-MOF是高性能ZIB的高效阴极材料.
- 凝电解质对于提高基于C-MOF的ZIB的稳定性和周期寿命至关重要,特别是在灵活的应用中.
- 这项工作为设计用于灵活储能设备的稳定C-MOF阴极提供了有价值的见解.
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