Integrated reduced graphene oxide multilayer/Li composite anode for rechargeable lithium metal batteries

Abstract

Suppressing the growth of dendritic lithium is one of the most critical challenges for the development of Li metal batteries. Herein we report an integrated reduced graphene oxide (rGO) multilayer/Li composite electrode, in which filtration-synthesized free-standing rGO film acts as a conductive support for the strong anchoring of Li metal. When tested as an electrode for rechargeable Li metal batteries, the rGO/Li composite exhibits noticeable enhancement of electrochemical performance with better cycling stability than the unmodified Li. The interconnected rGO layers not only help to suppress the formation of dendritic Li, but also store the dead Li and restrain the uneven surface potential. The proposed electrode design protocol would provide a better insight into the preparation of other high-performance lithium-based batteries.