一种动态稳定的硫化物电解质架构,用于高性能全固态金属电池.
Xinyang Wang1, Wei Jiang2, Xinxin Zhu2
1State Key Laboratory of Chemical Engineering, Institute of Pharmaceutical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
Small (Weinheim an der Bergstrasse, Germany)
|December 14, 2023
概括
这项研究引入了一种稳定的硫化物电解质结构,以防止固态电池中的树生长. 这一突破提高了下一代金属电池的安全性和性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 使用硫化物电解质和金属阳极的全固态电池提供高安全性和能量密度.
- 一个主要的挑战是金属和硫化物电解质之间的界面不稳定性,阻碍了实际应用.
研究的目的:
- 开发一个动态稳定的硫化物电解质结构,以提高界面稳定性.
- 为了研究防止二树脂透的机制.
主要方法:
- 设计包含MS4 (M = Ge或Sn) 单元的多层硫化物电解质结构.
- 在接口上分析动态分解合金过程.
- 使用Li6PS5Cl电解构架构的Li10SnP2S12电解构架构.
主要成果:
- 多层结构有效地通过受控的分解合金工艺禁止丁矿的透.
- 在接口上形成绝缘Li2S层限制了分解,并确保了长期的极化稳定性.
- 开发的电解质架构使金属阳极具有超过3mA cm-2的临界电流密度,并稳定超电位约900小时.
- 一个Li的电池LiNi0.8Co0.Mn0.1O2电池在低堆压力下在1C的600个循环后显示出75.3%的容量保留.
结论:
- 动态稳定的硫化物电解质结构显著提高了金属固态电池的界面稳定性.
- 这种方法解决了树抑制和长期循环表现的关键挑战.
- 这些发现为更安全,更高能量密度的固态电池铺平了道路.
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