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 x 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.

Automated summary

The use of organic/inorganic composite solid electrolytes (CSEs) in solid-state lithium batteries (LIBs) has gained significant attention due to its benefits such as good interfacial compatibility, low cost, high efficiency, and safety. In this study, Li2ZrO3, an inorganic Li-ion conductor, is used for the first time as an electrolyte filler in fabricating organic/inorganic CSE films. The CSE with 20% Li2ZrO3 powder in polyethyleneoxide (PEO) demonstrates high comprehensive performance, with a room-temperature conductivity of 6.76 x 10-6 S cm-1, electrochemical window of 4.2 V, and ionic transference number of 0.20. The introduction of Li2ZrO3 reduces interfacial resistance and enhances the stability of the CSE film. Flexible Li/CSE/NCM811 solid-state LIBs assembled with Li2ZrO3/PEO CSE show high rate capability and cycling stability.