▎ 摘　　要

Incorporation of materials such as metal oxides into the graphene matrix has been proved to be an effective approach to fabricate high performance electrode material for electrochemical energy storage devices. In this work, we report a novel strategy to fabricate MnO2-graphene nanocomposites by ripening of amorphous MnO2 in the GO matrix and subsequent thermal reduction. In the ripening process, the final nanoparticles are in-situ formed to enhance the attachment between nanoparticles and graphene, and due to there is no direct introduction of metal ions, the aggregation of GO nanosheets can be avoided. The influence of GO on the ripening of MnO2 have also been investigated. When tested as LIB anode material, the MnO2-graphene nanocomposites show improved performances compared with plain MnO2 nanowire.