Self-supporting and flexible organic potassium terephthalate with controllable carbon layers in K-ion batteries

Herein, we report a self-supporting and flexible K2TP/MWNCTs/C anode material prepared by electrostatic spinning and controlled medium temperature heat treatment in potassium-ion batteries. The results show that the flexible carbon cladding and stably conductive network structure can facilitate the transport of K+ and electron. The as-synthesized K2TP/MWNCTs/C flexible anode can exhibit a high specific capacity of 150.6 mAh g−1 after 100 cycles at a current density of 50 mA g−1. These results are of significant to explore high-performance organic flexible devices.