Effect of Three-dimensional Graphene on the Cycle Life of Lead Acid Battery Operating under the High-rate Partial-state-of-charge Condition

Three-dimensional porous graphene (3D-rGO) was prepared by the one-step hydrothermal method, and was incorporated into the negative active materials at different dosage (mass percentage) to prepare lead carbon batteries. The properties of prepared batteries were characterized. The results showed that with the increase of the doping amount of 3D-rGO, the batterys cycle life under the high-rate partial-state-of-charge (HRPSoC) condition increases first and then decreases. The battery with 1% 3D-rGO exhibits the best performance of HRPSoC, and the initial discharge capacity (0.05C, 185.36 mAh/g) delivered by the battery is 14.46% higher than that of the control cell (161.94 mAh/g). Its cycle life reaches 26 425 cycles, which is improved by more than 224% compared to the cycle life of ordinary lead-acid battery (8 142 cycles).