Succinonitrile Plastic Crystal Polymer Electrolyte for Lithium Metal Battery

Abstract

Polymer electrolyte has attracted wide attention due to the advantages of easy fabrication, lightweight, and good mechanical flexibility. However, polymer electrolyte exhibits limited ionic conductivity at room temperature, so the batteries can only be used above room temperature. Here, a succinonitrile plastic crystal polymer composite electrolyte (SCPE) with high content of succinonitrile (SN) was fabricated by in-situ polymerization. SCPE exhibits high ionic conductivity, which can be used at room temperature. In addition, SCPE exhibits excellent stability to lithium and can stable cycle over 1500 h without short circuits. Furthermore, LFP|SCPE|Li can achieve 150 stable cycles, presenting excellent cyclic stability performance. This research provides a feasible method for high room temperature ionic conductivity plastic crystal polymer electrolyte.