Sr2+-doped rhombohedral LiHf2(PO4)3 solid electrolyte for allsolid-state Li-metal battery

被引：0
|
作者：
Qing-Hui Li [1 ]
Chang Xu [2 ,3 ]
Bing Huang [2 ,3 ]
Xin Yin [1 ]
机构：
[1] College of Electrical and Information Engineering,Hunan University
[2] State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University
[3] School of Materials Science and Engineering,Tianjin University
来源：
Rare Metals | 2020年 / 39卷 / 09期
基金：
中国国家自然科学基金;
关键词：
D O I：
暂无
中图分类号：
TM912 [蓄电池];
学科分类号：
0808 ;
摘要：
Solid-state electrolytes in rechargeable all-solidstate Li-metal batteries,which have better safety and higher specific capacity than conventional rechargeable Liion batteries with liquid electrolytes,are limited by the low Li-ion conductivity of the solid electrolyte and the large electrolyte/electrode interfacial resistance.Here,we report a new rhombohedral NAS ICON structure Li1.4Sr0.2Hf1.8(PO4)3with a high Li-ion conductivity of 1.62×10-5S·cm-1at 25℃,and its conductivity can be improved to 3.4×10-5S·cm-1after the densification of the pellet by hot pressing.Li1.4Sr0.2Hf1.8(PO4)3coated by a thin layer of polymer electrolyte showed a stable lowimpedance dendrite-free plating/stripping process in a symmetric Li/Li cell for 100 h;moreover,the Li1.4Sr0.2Hf1.8(PO4)3electrolyte had a small interfacial resistance in all-solid-state Li/LiFePO4cell,which allows a high Coulombic efficiency and good cycling of the cell.
引用
收藏
页码：1092 / 1098
页数：7
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