在现场建造化物合金双相接口,用于无藻硫化物固态电池
Yao Liu1,2,3, Jiamin Fu4, Mengzi Geng1
1Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China.
Advanced materials (Deerfield Beach, Fla.)
|October 23, 2025
概括
用GaCl3和InCl3对 argyrodite固体电解质的表面修改产生了一种保护性介面,增强了金属电池的稳定性,并防止了树的生长,以提高性能.
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
- 固态化学 固态化学
背景情况:
- 硫化物固体电解质为固态金属电池提供高离子导电性和机械灵活性.
- 然而,它们与金属的反应性会导致界面降解和树的生长,限制了实际应用.
研究的目的:
- 通过表面修改,为 argyrodite 固体电解质设计一个稳定的接口.
- 为了提高金属电池的电化学性能和循环稳定性.
主要方法:
- 将Li6PS5Cl固体电解质与GaCl3和InCl3同时处理,以形成一个in situ间相.
- 介相组合和结构的表征.
- 电化学测试Li的有机体Li对称细胞和LiNi0.9Mn0.05Co0.05O2的有机体Li全细胞.
主要成果:
- 在现场形成一个由LiCl,Li-Ga和Li-In合金组成的多功能间相.
- Cl矩阵抑制了树突的形成,而合金网则促进了均的离子运输.
- 立体二氧化对称细胞在0.5mA cm-2.0下表现出超过2600小时的稳定循环.
- 富含Ni阴极的全电池在1000个循环后实现了80%的容量保留.
结论:
- 工程表面涂层有效地稳定了硫化物固体电解质中的阳极接口.
- 这种方法提高了argyrodite类型电解质的可行性,用于高性能全固态金属电池.
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