一种含有LLTO的异质复合电解质,具有固态金属电池的稳定接口
Jiaying Bi1,2, Ling Zhang2,3, Borong Wu2,3,4
1College of New Energy, Xi'an Shiyou University, Xi'an 710065, China. jybi@xsyu.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|September 23, 2023
概括
一种新型异质复合电解质 (PLTP) 增强了固态金属电池的界面稳定性. 这种改进的接口提高了离子导电性和电化学性能,为先进的电池开发铺平了道路.
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
- 固态电池 固态电池是什么
背景情况:
- 在Li0.33La0.56TiO3 (LLTO) 和金属阳极之间的界面不稳定性阻碍了固态电解质的性能.
- 这种不稳定性限制了基于LLTO的固态电解质在金属电池中的实际应用.
研究的目的:
- 设计和制造一种异质复合电解质 (PVDF-HFP@LLTO/PEO或PLTP),以提高接口稳定性.
- 通过解决LLTO/金属阳极接口来提高固态金属电池的电化学性能.
主要方法:
- 通过将PEO层粘附在PVDF-HFP@LLTO (PLT) 膜上来制造异质复合电解质 (PLTP).
- 电解质的离子导电性和电化学窗口的表征.
- 使用PLTP电解质,组装和测试固态Li和LiFePO4和Li和LiNi0.6Co0.2Mn0.2O2电池.
主要成果:
- 在60°C时,PLTP电解质实现了3.23 × 10−4 S cm−1 的优异离子导电性.
- 一个高稳定的电化学窗口高达4.7V (vs). 李/李+) 是观察到的.
- 由于PEO层的保护,在电解质/金属阳极接口上显著提高化学稳定性.
- 固态电池表现出令人印象深刻的电化学性能,包括高库伦比效率和稳定的循环.
结论:
- 不同质的PLTP复合电解质有效地减轻了固态金属电池的界面不稳定性.
- 增强的界面稳定性和电化学特性使PLTP成为先进固态电池开发的有希望的替代品.
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