Effect of Graphene Oxideon the Properties.pdf

Effect of Graphene Oxide on the Properties of A Its Composite with Polyaniline R T Hualan Wang, Qingli Hao,* Xujie Yang, Lude Lu, and Xin Wang* I C Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and L Technology, Nanjing, P.R. China E ABSTRACT Graphene oxide, a single layer of graphite oxide (GO), has been used to prepare graphene oxide/polyaniline (PANI) composite with improved electrochemical performance as supercapacitor electrode by in situ polymerization using a mild oxidant. The composites are synthesized under different mass ratios, using graphite as start material with two sizes: 12 500 and 500 mesh. The result shows that the morphology of the prepared composites is influenced dramatically by the different mass ratios. The composites are proposed to be combined through electrostatic interaction (doping process), hydrogen bonding, and π-π stacking interaction. The highest initial specific capacitances of 746 F g-1 (12 500 mesh) and 627 F g-1 (500 mesh) corresponding to the mass ratios 1:200 and 1:50 (graphene oxide/aniline) are obtained, compared to PANI of 216 F g-1 at 200 mA g-1 by charge-di