Al-incorporation into Li7La3Zr2O12 solid electrolyte keeping stabilized cubic phase for all-solid-state Li batteries

• 来源期刊: 能源化学
• 年，卷（期）: 2018,（5）
• 页码范围: 1501-1508
• 页数: 8页
• 语种: 英文

摘要

We observe the influence of Al occupancies in Li sites on the formation process of the garnet solid electrolyte of Li7La3Zr2O12 (LLZO).A direct incorporation of Al is first promoted in a Li-insufficient garnet solid electrolyte during the calcination process of 850 ℃ and then the cubic phase of LLZO is obtained after successive annealing step of 1000 ℃.Comparing to pristine LLZO,Al incorporated LLZO shows less formation of Li2CO3,keeping crystallographic and physicochemical properties.This Al incorporation improves both the ionic conductivity and interracial resistance to poisoning procedure.