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机械诱导的桥梁间层,使高度可逆的全固态硫阴极成为可能

Minkang Wang¹, Han Su¹, Fanya Zhao¹

¹State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Advanced materials (Deerfield Beach, Fla.)

|September 29, 2025

概括

一种新的机械化学方法通过提高硫阴极性能来增强全固态硫电池 (ASSLSB). 这一突破解决了稳定性和速率的限制,为更安全,高能量密度的存储解决方案铺平了道路.

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
储能储能储能储能储能储能

背景情况:

全固态硫电池 (ASSLSB) 提供高能量密度和安全性,但在固态硫转化方面面临挑战,限制稳定性和速率性能.
ASSLSBs的工业实施受到硫阴极内的分子,接口和电极水平的动力限制的阻碍.

研究的目的:

开发一种新的方法来克服所有固态硫阴极的动力限制.
提高ASSLSB的循环稳定性和速度性能.
为了促进ASSLSB技术的工业化.

主要方法:

采用机械化学合成方法,创建一个无形酸 (LPSI) 介层.
在硫活性物质和硫化物阴解体之间集成了LPSI中间层.
使用高硫负载和高电流密度来评估电化学性能.

主要成果:

在现场生成的LPSI中间层建立了有效的离子导电路,并加强了接口接触.
LPSI作为氧化还原调解剂,调节硫氧化还原路径并加速硫氧化还原动力学.
在1600个循环中,S@LPSI/LPSC阴极在6mgcm−2硫负载和5mAcm−2电流密度下实现了93.8%的容量保留.
袋式电池的重力测量能量密度超过420Wh kg-1.1.

结论:

机械化学方法成功地解决了所有固态硫阴极的多尺度动力限制.
开发的硫阴极表现出卓越的电化学性能和长期循环稳定性.
这一进步极大地促进了ASSLSB技术的工业化潜力.

关键词:

所有固态LiS电池都是固态的.机械完整性机械完整性机械完整性多尺度优化优化多尺度优化再氧化化学还原化学硫转化动力学硫转化动力学

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