Lithium-ion-conductive sulfide polymer electrolyte with disulfide bond-linked PS4 tetrahedra for all-solid-state batteries

Abstract Due to their high conductivity and interface formability, sulfide electrolytes are attractive for use in energy density all-solid-state batteries. However, electrode volume changes during charge-discharge cycling typically cause mechanical contact losses at the electrode/electrolyte interface, which leads capacity fading. Here, suppress this loss, isolated PS 4 3- anions reacted with iodine prepare a polymer electrolyte that forms sticky gel dispersion anisole drying of resulting supernatant. This polymer, featuring flexible (–P–S–S–) n chains enhanced solubility anisole, is applied as lithium-ion-conductive binder sheet-type batteries, creating cells low resistance retention.