▎ 摘　　要

In this article, we report the electrochemical performance of Li2ZrO3-coated LiMn2O4 nanoparticles composited with graphene. The LiMn2O4 nanoparticles were coated with a stable oxide, Li2ZrO3, to protect their vulnerable surface from reaction with an electrolyte. The Li2ZrO3-coated LiMn2O4 nanoparticles were composited with graphene using electrostatic interaction without heat treatment. Graphene may compensate for the low conductivity of the LiMn2O4 nanoparticles because of its wide surface area and high conductivity. The Li2ZrO3-coated LiMn2O4/graphene nanocomposite showed superior rate capability, cyclic performance, and thermal stability to those of pristine and Li2ZrO3-coated LiMn2O4. This enhancement in electrochemical performance is attributed to the dual effect of the Li2ZrO3 coating layer protecting the LiMn2O4 surface and graphene providing a high-conductivity matrix.