Li₂S-Li₂O-P₂S₅ solid electrolyte for all-solid-state lithium batteries

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• 作者：James E. Trevey ; ^{jetrevey@hrl.com} ; Jeremy R. Gilsdorf ; Sean W. Miller ; Se-Hee Lee
• 关键词：Solid-state ; Lithium ; Battery ; Sulfur ; Lithium cobalt oxide
• 刊名：Solid State Ionics
• 出版年：2012
• 期刊代码：96_01672738
• 类别：ch
• 出版时间：25 April, 2012
• 卷：214
• 期：Complete
• 页码：25-30
• 文件大小：1375 K

摘要

Various compositions of Li₂S-Li₂O-P₂S₅ solid electrolytes were prepared by planetary ball milling and systematically investigated. Structural analysis by X-ray diffraction (XRD) and Raman spectroscopy showed phase changes in the electrolyte corresponding to changes in conductivity. All-solid-state LiCoO₂/Li cells were tested by constant-current-constant-voltage (CCCV) charge-discharge cycling at a current density of 50 渭A cm^鈭?#xA0;2 between 2.5 and 4.3 V (vs. Li/Li⁺). In spite of reduced conductivity from introducing oxide species into a sulfide based electrolyte, increased cycle stability is observed for increased concentrations of Li₂O in the electrolyte.