Dual-salt reinforced polyacrylonitrile-based composite solid electrolyte for stable lithium metal batteries.

Composite solid electrolytes (CSEs) have exhibited considerable promise in the advancement of solid-state lithium batteries, attributed to their inherent safety, straightforward manufacturing processes, and flexibility. Nevertheless, the practical applications of CSEs are constrained by their low ionic conductivity and insufficient interfacial compatibility. Herein, we proposed a strategy for modulating Li conduction and interfacial compatibility by incorporating Lithium bis(trifluoromethanesulfonyl)imide/Lithium bis(oxalate)borate (LiTFSI/LiBOB) dual salts in polyacrylonitrile-based CSE.