▎ 摘　　要

Organic battery materials are ideal anodes for potassium ion batteries (PIBs) due to their structural diversity, abundant resources, and environmental friendliness. Herein, we report a conjugated polymer, polybenzo[1,2-b:4,5-b']dithiophene-4,8-dione (PBDTO), with a coaxial spiral structure. The plane rotation angle of each PBDTO molecule is about 20 degrees apart, which is conducive to the exposure of reactive sites. Introducing reduced graphene oxide (rGO) drastically reduces the material's solubility in the electrolyte and finally obtains PBDTO/rGO with high conductivity, low solubility, and high capacity. As a result, PBDTO/rGO exhibits excellent potassium storage performance with a reversible capacity of 395 mAh g(-1) at 100 mA g(-1) and long-term cycling stability at high current density, for example, a capacity of 200 mAh g(-1) after 1000 cycles at 1 A g(-1). This work may inspire researchers to develop efficient organic battery electrodes for next-generation energy storage devices.