Hunting highly conductive Li6PS5I electrolyte via Sn-Cl dual doping for solid-state batteries
发布时间：2022-12-26
点击次数：
- 论文类型：
- 期刊论文
- 发表刊物：
- Scripta Materialia
- 收录刊物：
- SCI
- 所属单位：
- 华中科技大学电气与电子工程学院
- 刊物所在地：
- 荷兰
- 学科门类：
- 工学
- 一级学科：
- 材料科学与工程
- 文献类型：
- J
- 卷号：
- 226
- 页面范围：
- 115219-115225
- 关键字：
- Li6PS5I Ionic conductivity Sn-Cl dual doping Solid-state batteries Electrochemical performances
- DOI码：
- 10.1016/j.scriptamat.2022.115219
- 影响因子：
- 6.302
- 教研室：
- 电力系
- 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/c 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.