Li0.33La0.557TiO3@BaTiO3 core–shell fiber as a filler to promote the dissociation and migration of lithium ions in solid polymer electrolytes

An Li 0.33 La 0.557 TiO 3 @BaTiO 3 (LLTO@BTO) core–shell fiber is synthesized. The BTO shell enhances lithium salt dissociation and protects LLTO, while LLTO facilitates rapid Li + transport. PEO-LLTO@BTO exhibits 1.44 mS cm −1 ionic conductivity at 30 °C.