用异质固体电解质拦截树的生长,用于长寿命全固态金属电池
Tao Yu1,2, Yuankai Liu1,2, Yiwen Liu1
1College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing, 210023, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 7, 2024
概括
研究人员开发了一种新型异质电解质,以防止所有固态电池中的树生长. 这项创新通过控制离子传输和提高接口稳定性来提高电池安全性和能量密度.
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
- 电池技术 电池技术
背景情况:
- 金属阳极提供高能量密度,但由于全固态电池中的树石形成,面临安全挑战.
- 树岩的生长是一个关键问题,阻碍了金属阳极的实际应用,损害了电池的安全性和性能.
- 控制离子传输和接口稳定性对于实现高性能全固态电池至关重要.
研究的目的:
- 调查异质电解质在金属阳极中调节离子运输和树生长的使用.
- 通过利用离子导电性的差异来增强固体电解质的树脂电阻.
- 提高所有固态电池的界面稳定性和电化学性能.
主要方法:
- 利用具有不同离子导电性的异质电解质来引导离子运输和树生长.
- 研究了来自Li10GeP2S12和树突之间的反应的Li-Ge合金相在现场的形成.
- 制造并测试了对称的电池和电池LiNi0.8Co0.1Mn0.1O2全电池,以评估性能.
主要成果:
- 实现了2.1 mA cm-2的高临界电流密度,证明了增强的树抗性.
- 长期稳定的对称电池在0.3 mA cm-2下运行了17000小时,在1.0 mA cm-2下运行了2000小时.
- 完整的电池在500个循环后保持了80.5%的容量,并且在2.0 mA cm-2.0 时具有125.4 mAh g-1 的速率能力.
结论:
- 不同质的电解质有效调节离子运输,抑制树的生长.
- 在现场形成的Li-Ge合金相显著提高了树抗性.
- 开发的战略为推进全固态电池的安全性和性能提供了一个有希望的方法.
相关概念视频
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