PEO/Li2ZrO3 composite electrolyte for solid-state rechargeable lithium battery

The organic/inorganic composite solid electrolytes (CSEs) for solid-state lithium batteries (LIBs) have attracted much attention for the possible advantages such as good interfacial compatibility, low cost, high efficiency and safety, etc. In this work, Li 2 ZrO 3 inorganic Li-ion conductor is first time used as electrolyte filler for fabricating organic/inorganic CSE films. The CSE with 20 % (weight percentage) of Li 2 ZrO 3 powder in polyethyleneoxide (PEO) exhibits high comprehensive performance with room-temperature conductivity of 6.76 × 10 −6  S cm −1 , electrochemical window of 4.2 V and ionic transference number of 0.20. The introduction of Li 2 ZrO 3 obviously reduces the interfacial resistance between PEO and Li metal, and enhances the CSE stability by reducing the decomposition of LITFSI in CSE film. The assembled flexible Li/CSE/NCM811 solid-state LIBs deliver high rate capability and cycling stability. Li 2 ZrO 3 /PEO CSE is a promising electrolyte for flexible solid-state LIBs.