▎ 摘　　要

1D CO nanofiber graphene (CO/G) composites were successfully synthesized by a two-step hydrothermal method. The CO/G composites could limit the aggregation of CO and improve the electronic conductivity at the same time. As a result, the as-prepared CO/G composite electrode had a high reversible capacity of 1591.4 mAh g(-1) for the first cycle, and the capacity remained at 550 mAh g(-1) after 70 cycles.