自适应的超离子电解质通过多个阴离子调制,用于全固态金属电池
Zhiying He1,2, Tao Yu1,2, Lixin Liang3
1Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China.
Journal of the American Chemical Society
|March 16, 2026
概括
一种与银和结合的新型 argyrodite 固态电解质增强了金属电池的安全性和性能. 这种双离子方法稳定了接口,使下一代电池能够实现稳定的循环和高能量密度.
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:
- 全固态金属电池承诺高能量密度和安全性.
- 在金属/电解质接口的接口不稳定性阻碍了实际应用,特别是在高电流密度下.
- 目前的稳定方法复杂而昂贵,需要更简单的电解质设计策略.
研究的目的:
- 开发一种简单而有效的固态电解质设计,以提高界面稳定性和离子导电性.
- 通过使用一种新的电解质组成,对金属阳极和固体电解质接口 (SEI) 的现场修改进行研究.
- 通过提高性能和稳定性,推进全固态金属电池的实际应用.
主要方法:
- 开发一种多个阴位预设 (Ag和W) 的酸固态电解质.
- 在现场分析电池循环期间的界面反应和金属阳极修改.
- 在各种条件下对对称电池和Li//LiNi$_{0.8}$Co$_{0.1}$Mn$_{0.1}$O$_{2}$全电池进行电化学测试.
主要成果:
- 开发的电解质具有超离子导电性 (>10 mS cm$^{-1}$) 和增强的界面稳定性.
- 在现场形成阳极上的均Li-Ag合金和SEI中的导电LiWS$_{2}$层.
- 持续循环的Li对称细胞超过4000小时在0.5mA cm$^{-2}$和1000小时在1mA cm$^{-2}$.
- 在2°C的1100个循环后,全电池显示82.7%的容量保留,在高面积负载和低温度 (-30°C) 下稳定运行.
结论:
- 双离子 argyrodite 电解质通过 in situ 阳极修改有效地稳定了金属接口.
- 这一策略显著提高了全固态金属电池的循环稳定性,速率能力和运行范围.
- 可扩展的双离子调制为下一代储能器件设计先进的固态电解质提供了一条通道.
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