▎ 摘　　要

The V3O7/graphene oxide nanocomposites (V3O7/GO) were synthesised by a hydrothermal method. In the nanocomposites, the V3O7 nanobelts are dozens of nanometres in width and several micrometres in length. Acted as the electrode materials, the V3O7/GO nanocomposites exhibit a high initial discharge capacity of 352 mAh.g(-1) at the current density of 100 mA.g(-1). Moreover, V3O7/GO electrode materials exhibit a good cycling performance. Comparing the 50th cycle with the 1st cycle, the capacity retention of the V3O7/GO nanocomposites is 87% and 91% at the current density of 400 mA.g(-1) and 800 mA.g(-1), respectively.