在传统电解质中构建有机-无机坚固的介面,从深层环氧溶液中构建高度稳定的Mg金属阳极
Xuejun Zhou1,2, Guyue Li1,2,3, Yifan Yu1,2,3
1State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China.
Small methods
|December 7, 2023
概括
一种新的深度环氧溶液 (DES) 策略有效地修改阳极,防止被动化,并使金属电池 (MMB) 能够稳定循环. 这一突破增强了接口动力学,并减少了对持久电池性能的过度潜力.
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:
- 金属电池 (MMB) 受到传统电解质中Mg金属被动化和高超电位的阻碍.
- 开发稳定和高效的接口对于推进MMB技术至关重要.
研究的目的:
- 为修改Mg阳极提出一个具有成本效益的深度环氧溶液 (DES) 策略.
- 为了提高MMB中Mg涂层/脱落行为的稳定性和可逆性.
主要方法:
- 一个MgCl2-Al-MgCl2三明治结构涂层被应用到Mg阳极使用DES.
- 通过现场的Mg-Al位移反应形成了一种有机/纳米晶混合介质.
- 电化学性能被评估为Mg{TFSI) 2/DME电解质与CuS和phenanthraquinone阴极.
主要成果:
- 通过对DES进行修改,形成了紧且稳定的介相,并最大限度地降低了被动化和扩散障碍.
- 实现了高度可逆的Mg阳极循环,在0.1 mA cm-2时超过5000小时.
- 即使在高电流密度 (0.23V在1 mA cm-2) 中,也保持了低的超电位.
结论:
- 这种由DES辅助的策略为MMBs提供了强大且导电的固体电解质介相.
- 这种方法为设计高压和耐用的金属电池提供了新的途径.
- 该方法有效地解决了金属阳极性能方面的关键挑战.
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