All-solid-state lithium batteries(ASSLBs)are now becoming a recognized future direction for the lithium battery industry.Sulfide solid state electrolyte Li6PS5Cl(LPSCl)is characterized by high lithium ion conductivity(～10-2 S·cmn-1)and good mechanical processing performance.However,sulfide still faces the problem of space charge layer,so the buffer layer must be introduced in practical applications.On the other hand,the halide solid-state electrolyte Li3InCl6(LIC)is considered to be an excellent buffer material due to its high ionic conductivity and excellent compatibility with cathode material.In this study,the surface of micro LiCoO2(LCO)was modified with nano LIC as the coating material.The results show that the best performance is achieved at 0.75％covering dosage,with 0.1 C specific capacity of 134.5 mA·h·g-1,and 1 C capacity retention of 90.4％at 500 cycles.Based on the design of micro-nano interfacial structures,the"ion transport-electron rejection"conduction network is well constructed.The interfacial side reactions and the formation of space charge layers are prevented,which significantly improves the cycling stability of LCO.This modification strategy provides an effective solution to enhance the interfacial compatibility of"LCO/LPSC1".
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