High-performance all-solid-state Li2S batteries using an interfacial redox mediator

We report a Li 2 S/LiVS 2 core–shell nano-architecture design for all-solid-state Li 2 S batteries where the LiVS 2 shell serves as both a Li + /e − transport vehicle and redox mediator for Li 2 S on charge to help overcome sluggish cathode kinetics.