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在全固态电池中NCM811-硫化物电解质界面降解机制和调节策略

Haoyu Feng¹, Guanghan Zhu², Ziming Wan¹

¹School of Science, School of Chip Industry, Hubei University of Technology, Wuhan, Hubei, 430068, China.

|October 13, 2025

概括

全固态电池 (ASSLB) 在安全性和能量密度方面表现有前途. 然而,NCM811阴极和硫化物固态电解质之间的接口不稳定性,通过导致降解,阻碍了商业化.

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:

使用NCM811阴极和硫化物固态电解质 (SSEs) 的全固态电池 (ASSLB) 提供了更高的安全性和高能量密度.
消除液体电解质使金属阳极的使用成为可能,进一步提高了能量密度.

研究的目的:

建立一个机制框架,以了解NCM811/硫化物SSE接口的复杂降解途径.
系统地评估稳定策略,以减轻ASSLB的界面不稳定性.

主要方法:

对ASSLBs的界面降解机制现有文献的审查.
分析连接的机械,化学和电化学降解过程.
评估表面修改,散装工程和协同设计方法.

主要成果:

界面不稳定性来自于涉及机械应力,化学反应和电化学循环的合降解循环.
其表现包括接触损失,微裂,空间电荷层效应和阻抗增长.
稳定策略有希望,但固有的物质不兼容性仍然存在.

结论:

对NCM811/硫化物SSE接口退化的一致的机制理解对于ASSLB的发展至关重要.
为了实现商业可行性,还需要在材料设计,接口工程,表征和制造方面取得进一步的突破.
本综述为开发实用和商业可行的ASSLB提供了洞察力.

关键词:

它是LiNi0.8Co0.1Mn0.1O2的组成部分.所有固态电池都是固态电池.阴极/固态电解质接口降解机制的降解机制硫化物固态电解质硫化物固态电解质

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