title: Fabrication of high-surface-area graphene/polyaniline nanocomposites and their application in supercapacitors.
abstract: Graphene/polyaniline (PANI) nanocomposites were prepared by reducing graphene oxide with hydrazine in the presence of different amounts of polyaniline nanoparticles. In situ cryo-transmission electron microscope (TEM) images of a graphene oxide (GO)/PANI solution revealed that the PANI nanoparticles were anchored on the surface of the GO sheets. During the reduction, the as-adsorbed PANI nanoparticles were sandwiched between layers of graphene sheets. These PANI nanoparticles acted as spacers to create gaps between neighboring graphene sheets, resulting in a higher surface area compared to pure graphene. Graphene/PANI nanocomposites exhibited the high specific surface area of 891 m2/g. Utilizing this composite material, a supercapacitor with a specific capacitance of 257 F/g at a current density of 0.1 A/g has been achieved.
authors.affiliation: Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University (IUPUI), Indianapolis, Indiana 46202, United States.
authors.forename: Zhe-Fei
authors.initials: ZF
authors.lastname: Li
authors.forename: Hangyu
authors.initials: H
authors.lastname: Zhang
authors.forename: Qi
authors.initials: Q
authors.lastname: Liu
authors.forename: Lili
authors.initials: L
authors.lastname: Sun
authors.forename: Lia
authors.initials: L
authors.lastname: Stanciu
authors.forename: Jian
authors.initials: J
authors.lastname: Xie