通过多功能离子共价有机框架对坚固的 Zn 金属阳极进行传输动力学指令
Yuhan Zou1, Yongbiao Mu2, Tian Wang3,4
1College of Energy, Soochow Institute for Energy and Materials Innovations, SUDA-BGI Collaborative Innovation Center, Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, Suzhou, 215006, P.R. China.
Angewandte Chemie (International ed. in English)
|June 15, 2025
概括
离子共价有机框架 (iCOFs) 通过改善离子运输和抑制副作用反应来稳定 Zn 阳极. 这导致Zn金属袋式电池的性能提高,用于下一代储能.
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:
- 共价有机框架 (COF) 是用于离子传输的可调节的多孔材料.
- 离子COF (iCOF) 通过静电相互作用提供增强的离子选择性和运输动力学.
- 稳定阳极接口对于高性能电池至关重要.
研究的目的:
- 在阳极上设计一个离子COF (iCOF) 接口膜.
- 为了利用iCOF来改善Zn2+运输和阳极稳定性.
- 为了证明iCOF在下一代储能系统中的有效性.
主要方法:
- 在Zn阳极上的低晶度iCOF膜的现场工程.
- 使用guanidinium部分用于水固定和H键相互作用.
- 采用coulombic相互作用来促进Zn2+解离和抑制SO42-.
主要成果:
- 该iCOF膜有效地固定水,抑制寄生虫的副作用反应.
- 库伦比相互作用促进Zn2+解离和均的Zn沉积.
- 经过修改的 Zn 阳极使得一个囊细胞具有 0.35 Ah g-1 的可逆容量和 98.72% 的保留率.
结论:
- 离子COF提供了一种强大的策略,用于调节电极-电解质接口上的离子运输.
- 开发的iCOF膜增强了 Zn 阳极的电化学稳定性和循环性能.
- 这项工作为在先进的储能设备中使用iCOFs提供了一个新的范式.
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