电解质
材料科学
阳极
阴极
电导率
兴奋剂
离子电导率
快离子导体
金属锂
化学工程
电池(电)
导电体
相容性(地球化学)
金属
锂(药物)
无机化学
电极
复合材料
光电子学
冶金
化学
物理化学
热力学
功率(物理)
内分泌学
医学
工程类
物理
作者
Cong Liao,Chuang Yu,Shuai Chen,Chaochao Wei,Xuefei Miao,Shijie Cheng,Jia Xie
标识
DOI:10.1016/j.scriptamat.2022.115219
摘要
The low Li-ion conductivity and poor interfacial compatibility towards cathode/anode materials of Li6PS5I solid electrolytes have significantly impeded their applications in all-solid-state batteries. This work developed a facial design strategy to improve the ionic conductivity and lithium metal compatibility of Li6PS5I electrolyte by the Sn-Cl dual doping. The optimal Li6.6P0.8Sn0.2S5I0.6Cl0.4 electrolyte shows ultrahigh conductivity up to 0.96 mS/cm and enhanced lithium metal compatibility. The assembled battery using LiNi0.6Mn0.2Co0.2O2 cathode and Li-In anode delivers a high initial discharge capacity of 175.7 mAh/g at 0.1C and maintains 79.2% after 100 cycles. Moreover, the corresponding battery using lithium metal anode displays a higher initial capacity (137.7 mAh/g vs. 112.7 mAh/g) and superior cyclability. The superior battery performances are attributed to the smaller interfacial resistances of those solid electrolyte-involved interfaces due to the Sn-Cl dual doping. This work demonstrates that the dual doping strategy is an effective route to exploring highly conductive Li6PS5I electrolytes.
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