构建石榴电解质与内部3D电子绝缘网络,用于无石固态金属电池
Jintao Liu1, Jie Wang1,2, Xiayueyang Mei1
1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 12, 2025
概括
研究人员通过将玻璃电解质纳入LLZTO开发了一种新的石榴石型固态金属电池 (SSLMB) 电解质. 这种复合材料有效地抑制了树的生长,提高了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
- 固态电池 固态电池是什么
背景情况:
- 石榴石类型的固态金属电池 (SSLMB) 提供高能量密度和安全性,但受到树石透的影响.
- 树突损害了电池的完整性和使用寿命.
研究的目的:
- 为了增强石榴石类型电解质的树抑制能力,用于实际的SSLMB应用.
- 为了提高固态金属电池的安全性和循环稳定性.
主要方法:
- 使用石榴石型Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 和玻璃电解质 (50Li2O-38B2O3-12SiO2,LBS) 制造一个复合电解质.
- 使用LBS在LLZTO谷物边界建造3D连续电子绝缘网络.
- 电化学测试Li的对称电池和LiFePO4的完整电池.
主要成果:
- 复合电解质显示出高临界电流密度为1.1 mA cm-2.
- 在对称细胞中,在0.2 mA cm-2下,在1000多个小时内实现了稳定的涂/脱落.
- 全细胞表现出高的初始特异容量141.8mA h g-1和稳定的循环超过100个周期.
结论:
- 通过创建电子绝缘网络,LLZTO-LBS复合电解质有效地抑制了树的生长.
- 这种新的电解质设计显著提高了固态金属电池的安全性和电化学性能.
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