Bacteria cellulose framework-supported solid composite polymer electrolytes for ambient-temperature lithium metal batteries.

Composite polymer electrolyte (CPE) films with high room temperature ionic conductivity are urgently needed for the practical application of high-safety solid-state batteries (SSBs). Here, a flexible polymer-polymer CPE thin film reinforced by a three-dimensional (3D) bacterial cellulose (BC) framework derived from natural BC hydrogel was prepared via thephoto-polymerization method. The BC film was utilized as the supporting matrix to ensure high flexibility and mechanical strength.