Fast and large lithium storages from CoMoO4 nanorods-graphene composite

Exploration of high-rate lithium-ion batteries (LIBs) still remains a great challenge because of the ineffective charge transfer in electrode materials. In this work, the one-dimensional (1D)-2D coupled composites consisted of CoMoO4 nanorods and graphene sheets are developed as high-rate LIBs anode materials. The composites are well characterized with powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), thermogravimetric analysis (TGA), and Raman spectrum. Endowed with the structural advantages, the present sample exhibits remarkably enhanced electrochemical properties, such as the best high-rate performance for CoMoO4-based electrode materials so far (646 mAh g−1 at 5 A g−1 after 200 cycles), excellent rate capability, and stable cyclability.