高配置 entropy 承诺电解质的电化学稳定性,用于高能量,长寿命的全固态电池
Deyuan Li1, Dongfang Yu2, Guangwen Zhang1
1Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China.
Angewandte Chemie (International ed. in English)
|October 21, 2024
概括
高固态电解质 (HE-SSEs) 提高了电池的稳定性和寿命. 这项研究表明,HE-SSEs提高了全固态电池 (ASSB) 的高压性能,为先进的能量存储铺平了道路.
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:
- 所有固态电池 (ASSB) 需要具有高离子导电性,稳定性和接口兼容性的固态电解质 (SSE),以获得高能量密度和寿命.
- 现有的SSE往往缺乏足够的离子导电性和电化学稳定性,特别是在高电压下.
研究的目的:
- 调查高SSEs (HE-SSEs) 的潜力,以提高ASSB的性能.
- 探索SSE中高配置和高压稳定性之间的关系.
- 为提高SSE的离子导电性和高压稳定性制定总体战略.
主要方法:
- 一种新型高性SSE (Li2.9In0.75Zr0.1Sc0.05Er0.05Y0.05Cl6) 的合成和表征.
- 使用HE-SSE与高压阴极材料制造和测试ASSB.
- 实验性表征和密度函数理论 (DFT) 计算,以了解接口行为和降解机制.
主要成果:
- 在ASSB中,HE-SSE表现出优越的高压和长周期稳定性.
- ASSB在4.8V时实现了250个周期,在4.6V时保持了81.4%的容量,在4.6V时达到5000个周期.
- DFT计算和实验数据证实,HE-SSE通过高和增强的接口稳定性,在高电压下抑制接口降解.
结论:
- 高配置与SSEs的高压稳定性改善热力学相关.
- 高设计是一种可行的策略,可以同时提高SSE的离子导电性和高压稳定性.
- 这种方法为开发高能耗和长寿命的ASSB提供了一个有希望的途径.
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