Fabrication of N,B-codoped Graphene Aerogel/PPy Composites for Asymmetric Supercapacitor

摘要

We report a facile, low-cost approach to fabricate N, B-codoped graphene aerogel/PPy composites for an asymmetric supercapacitor. The supercapacitor is based on the traditional sandwich-like structure composed of NBGA@PPy-TB as anode material and PPy-TB as cathode material. Analysis of NBGA@PPy-TB microstructure reveals that the PPy-TB is successfully coated onto the NBGA. The 3D cross-linked networking structures and heteroatom composition endow the NBGA@PPy-TB electrode with high specific capacity(566 F/g at 1 A/g). The electrochemical properties of asymmetric all-solid supercapacitor, such as capacitance, impedance, cycling stability, are discussed. The supercapacitor exhibits a fair specific capacity(160.3 F/g at 0.5 A/g).