Polyaniline decorated salt activated phenolic resin/PAN-based carbon nanofibers with remarkable cycle stability for energy storage applications

Polyaniline (PANI) decorated salt-activated phenolic resin (PR)/polyacrylonitrile (PAN)-based carbon nanofibers (PANI/CNFs) were fabricated by the consecutive solution electrospinning, salt activation and PANI electrode-position methods for supercapacitor applications. The electrochemical energy storage properties of the PANI-decorated activated PANI/CNFs (activated PAN: CNF-A, activated PR/PAN28 (weight ratio of PR and PAN is 2:8): CNF28-A) were evaluated by assembling the electrodes into a symmetric supercapacitor (SSC) device. The specific capacitance of the device was ca. 336F g-1 at the current density of 1 A/g. The device possessed an energy density of 13.33 Wh kg-1 at a power density of 200 W kg-1 with a retention life of nearly 100 % after 5,000 cycles.