Conversion inorganic interlayer of a LiF/graphene composite in all-solid-state lithium batteries.

The issues at the interface between the solid-state electrolyte (SSE) and electrodes limit the development of all-solid-state lithium batteries (ASSLBs). Herein, we report a LiF/graphene inorganic composite interlayer (ICI) which is in situ constructed at the cathode/garnet interface by electrochemical pre-lithiation of fluorinated graphene (GF). The ICI with flexibility and ion-conductivity can improve the contact between the cathode and garnet electrolyte, and thus enables the ASSLB to stably operate for 60 cycles without any liquid conditions.