Transition-metal oxides have attracted increased attention in the application of high-performance lithium ion batteries(LIBs), owing to its higher reversible capacity,better structural stability and high electronic conductivity.Herein, CoWO_4 nanoparticles wrapped by reduced graphene oxide(CoWO_4–RGO) were synthesized via a facile hydrothermal route followed by a subsequent heat-treatment process. When evaluated as the anode of LIB, the synthetic CoWO_4–RGO nanocomposite exhibits better Li~+ storage properties than pure CoWO_4 nanostructures synthesized without graphene oxide(GO). Specifically, it delivers a high initial specific discharge capacity of1100 mAh·g~(-1) at a current density of 100 mA·g~(-1), and a good reversible performance of 567 mAh·g~(-1) remains after the 100th cycle. Moreover, full battery using CoWO_4–RGO as anode and commercial LiCoO_2 powder as cathode was assembled, which can be sufficient to turn on a 3 V,10 mW blue light emitting diode(LED). The enhanced electrochemical performance for lithium storage can be attributed to the three-dimensional(3D) structure of the CoWO_4–RGO nanocomposite, which can accommodate huge volume changes, and synergetic effect between CoWO_4 and reduced graphite oxide(RGO) nanosheets,including an increased conductivity, shortened Li~+ diffusion path. Transition-metal oxides have attracted attention in the application of high-performance lithium ion batteries (LIBs), owing to its higher reversible capacity, better structural stability and high electronic conductivity. Herein, CoWO_4 nanoparticles wrapped by reduced graphene oxide (CoWO_4-RGO ) were synthesized via a facile hydrothermal route followed by a subsequent heat-treatment process. When as the anode of LIB, the synthetic CoWO_4-RGO nanocomposite exhibits better Li ~ + storage properties than pure CoWO_4 nanostructures synthesized without graphene oxide (GO). In particular, it delivers a high initial specific discharge capacity of 1100 mAh · g -1 at a current density of 100 mA · g -1, and a good reversible performance of 567 mAh · g -1 after the 100th cycle. The full battery using CoWO_4-RGO as anode and commercial LiCoO_2 powder as cathode was assembled, which can be sufficient to turn on a 3 V, 10 mW blue light emitting diode (LED). The enhanc ed electrochemical performance for lithium storage can be attributed to the three-dimensional (3D) structure of the CoWO_4-RGO nanocomposite, which can accommodate huge volume changes, and synergetic effect between CoWO_4 and reduced graphite oxide (RGO) nanosheets, including an increased conductivity , shortened Li ~ + diffusion path.