Preparation of 3D interconnected porous carbon foam with rich electrochemical active site for improved electrochemical performance

In the manuscript, one highly controllable method for synthesis of porous carbon foam (PCF) through a hard-temple polymer coating approach is displayed, and the final product is directly used as the electrode material of micro-supercapacitor and secondary zinc battery. The PCF exhibits plentiful pore structure, easier ion-diffusion reactions, and richer electrochemical active sites. Due to the unique adjustable pore structure, the as-prepared PCF exhibits better cycle performance and higher specific capacity, which is concluded from serial electrochemical tests of as-assembled micro-supercapacitor and zinc-ion battery. When used as the electrode material of flexible quasi-solid-state symmetric micro-supercapacitor, the PCF exhibits a high capacity and could maintain the initial capacity after relatively long cycles. When working as the cathode of zinc-ion battery, the PCF displays an enhanced cycle stability compared to commercial active carbon.