期刊
ADVANCED ENERGY MATERIALS
卷 10, 期 19, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202000335
关键词
elastic properties; glassy solid electrolytes; ionic transport; solid-state batteries; sulfide-based solid electrolytes
类别
资金
- Toyota Research Institute of North America
- Toyota Motor Engineering & Manufacturing North America Inc.
A combination of high ionic conductivity and facile processing suggest that sulfide-based materials are promising solid electrolytes that have the potential to enable Li metal batteries. Although the Li2S-P2S5 (LPS) family of compounds exhibit desirable characteristics, it is known that Li metal preferentially propagates through microstructural defects, such as particle boundaries and/or pores. Herein, it is demonstrated that a near theoretical density (98% relative density) LPS 75-25 glassy electrolyte exhibiting high ionic conductivity can be achieved by optimizing the molding pressure and temperature. The optimal molding pressure reduces porosity and particle boundaries while preserving the preferred amorphous structure. Moreover, molecular rearrangements and favorable Li coordination environments for conduction are attained. Consequently, the Young's Modulus approximately doubles (30 GPa) and the ionic conductivity increases by a factor of five (1.1 mS cm(-1)) compared to conventional room temperature molding conditions. It is believed that this study can provide mechanistic insight into processing-structure-property relationships that can be used as a guide to tune microstructural defects/properties that have been identified to have an effect on the maximum charging current that a solid electrolyte can withstand during cycling without short-circuiting.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据