Electro-activation to achieve entropy increase of organic cathode for potassium-ion batteries

Developing highly stable cathode materials is the key to achieving long-life K-ion batteries (KIBs). Considering that with higher entropy can promote ion adsorption process, we developed a method heat treatment and synergistic electro-activation of 3,4,9,10-perylene-tetracarboxylic dianhydride (EA-PTCDA) realize increase in PTCDA, which achieves storage. From our characterization results, molecular stacking structure EA-PTCDA C–O C–H bending vibration at edge position PTCDA molecules decreased after electro-activation, indicating achievement cathode. After treatment, exhibits high discharge capacity 92 mA h g−1 100 cycles 20 for KIBs. Even current density 200 g−1, also maintains specific 66 1000 cycles, showing shallow decay. We believe based on provides reference high-performance