材料科学
烧结
化学工程
水分
电解质
电化学
锂(药物)
制作
纳米技术
复合材料
电极
物理化学
病理
内分泌学
化学
工程类
替代医学
医学
作者
Wuliang Feng,Lei Zhu,Xiaoli Dong,Yonggang Wang,Yongyao Xia,Fei Wang
标识
DOI:10.1002/adma.202210365
摘要
Lithium-rich antiperovskites (LiRAPs) solid electrolytes have attracted extensive interest due to their advantages of structural tunability, mechanical flexibility, and low cost. However, LiRAPs are instinctively hygroscopic and suffer from decomposition in air, which not only diversifies their electrochemical performances in present reports but also hinders their application in all-solid-state lithium batteries (ASSLBs). Herein, the origin of the hygroscopicity, and also the effect of the hygroscopicity on the electrochemical performances of Li3-x (OHx )Cl are systematically investigated. Li3-x (OHx )Cl is demonstrated to be unstable in the air and prone to decompose into LiOH and LiCl. Nevertheless, with fluorine doping on chlorine sites, the hygroscopicity of LiRAPs is suppressed by weakening the intermolecular hydrogen bond between LiRAPs and H2 O, forming a moisture-resistive Li3-x (OHx )Cl0.9 F0.1 . Taking advantage of its low melting point (274 °C), two prototypes of ASSLBs are assembled in the ambient air by means of co-coating sintering and melt-infiltration. With LiRAPs as the solder, low-temperature sintering of the ASSLBs with low interfacial resistance is demonstrated as feasible. The understanding of the hygroscopic behavior of LiRAPs and the integration of the moisture-resistive LiRAPs with ASSLBs provide an effective way toward the fabrication of the ASSLBs.
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