Reducing crystallinity in solid polymer electrolytes for lithium-metal batteries via statistical copolymerization

Abstract The discovery that polyethylene oxide promotes ionic conductivity led to the development of solid polymer electrolytes. However, their is severely reduced by crystallinity. Here, statistical copolymerization used design macromolecular architectures where crystallinity disrupted a minimal amount non-ethylene comonomer units. Using Flory exclusion model, we demonstrate polymers containing 18 mol% and wt% LiTFSI are devoid A 10 content sufficient reach 0.3 × −4 S cm −1 at 25 °C. Li + transference number 0.6, indicating units not only limit but also weaken strength coordination polymer. resulting electrolyte effective in an all-solid LFP|Li-metal battery operating °C, demonstrating efficient tool for design.