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在高度可逆的Zn金属电池中,/电子两式双功能水分子失活器辅助接口稳定
Wenwei Zhang1, Shaohua Zhu1, Tong Yang1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China.
Angewandte Chemie (International ed. in English)
|December 10, 2024
概括
1,5-二醇通过抑制水的活动和促进均的沉积来稳定水性金属电池. 这增强了接口稳定性,使Zn//Zn细胞能够在5600多个小时内稳定循环.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性金属电池 (AZMB) 由于连续的键网络和寄生性电子消耗而遭受副作用.
- 不受控制的转移和界面不稳定性限制了AZMB的性能和寿命.
研究的目的:
- 在AZMB中稳定电极/电解质接口.
- 为了抑制副作用并提高AZMBs的循环性能.
主要方法:
- 将1,5-二醇 (PD),一种/电子两性分子,引入电解质.
- 研究PD对水活动,Zn2+溶解和电极沉积的影响.
- 在阳极和阴极接口上形成保护层.
主要成果:
- PD破坏了散装水的键网络,减少了水的活动,并增强了电子接受.
- PD优化Zn2+脱溶,导致均的沉积和稳定的阳极-电解质接口.
- Zn//Zn对称电池的稳定循环在1 mAh cm-2下超过5600小时,在50°C下250小时.
- 稳定的循环性能为VO2和I2阴极,用袋式电池实现0.13Ah容量.
结论:
- 1,5-二醇通过解决接口问题和改善电极沉积,有效地稳定了AZMB.
- 开发的战略显著提高了水性金属电池的循环稳定性和性能.
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