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Organic electrodes suffer from undesirable active site utilization and instability to solvents. Generally, polymerization is an effective way of inhibiting the dissolution of organics and ameliorating the rapid decline in battery capacity. However, the low electrical conductivity of polymers restricts their practical application. In this study, a dual-ion battery based on a polyimide/graphene compounds was constructed. Experiments reveal that the π electrons of polyimide can be quickly transferred through graphene and exhibit ultrafast reaction kinetics, thereby improving the capacity performance. Consequently, the dual-ion battery with a polyimide-graphene anode achieves a discharge capacity of 76.6 mAh g À 1 and demonstrates a capacity retention of 80 % at a high rate of 6300 mA g À 1 after 500 cycles. Additionally, the redox reaction process was studied systematically.

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