在现场形成的化铁化纳米,用于强化全固态电池中的阴极/电解质接口
Kang-Ning Gao1,2, Zhuang Sun1,2,3, Pei-Yuan Su4
1State Key Lab of High-Performance Ceramics and Superfine microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|April 11, 2025
概括
在高阴极上的岛状纳米通过抑制裂和增强离子传输来提高固态电池的性能. 这一创新提高了离子导电性和低压下电池的稳定性.
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:
- 全固态电池 (ASSB) 在阴极/电解质接口上面临离子运输的挑战.
- 接口问题是由阴极材料体积变化,粒子分布不佳和堆压力低造成的,导致裂.
研究的目的:
- 为基于的ASSB开发一种创新的阴极接口设计.
- 使用纳米器机械抑制界面裂,并通过电化学增强离子 (Li+) 运输.
主要方法:
- 在现场化铁 (LFC) 的化,在高阴极 (NCM) 表面上形成岛状的纳米.
- 使用物理蒸汽沉积方法进行纳米准备.
- 用LFC (F@NCM) 涂覆NCM,以改善固体电解质 (SE) 的覆盖和接触.
主要成果:
- LFC纳米具有低弹性模量,Li+导电性和电化学活性.
- 在NCM/SE接口实现了SE覆盖率的提高和稳定的物理接触.
- 基于F@NCM的电池在200个循环以低堆压力 (5MPa) 后显示出出色的速率性能和90.2%的容量保留.
结论:
- 这种LFC纳米可以有效地抑制界面裂的形成和传播.
- 该战略增强了ASSB中的离子传输和接口相互作用.
- 这种可扩展的方法为高性能ASSB开发提供了有希望的解决方案.
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