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, Li2ZrO3 inorganic Li-ion conductor is first time used as electrolyte filler for fabricating organic/inorganic CSE films. The CSE with 20 % (weight percentage) of Li2ZrO3 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 Li2ZrO3 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. Li2ZrO3/PEO CSE is a promising electrolyte for flexible solid-state LIBs.