title: Freestanding polyaniline nanorods grown on graphene for highly capacitive energy storage.
abstract: Freestanding polyaniline (PANI) nanorods grown in situ on microwave-expanded graphene oxide (MEGO) sheets were prepared through a facile solution method. The morphological characterization indicates that large quantity of free-standing PANI nanorods with average diameter of 50 nm were uniformly deposited onto the double sides of the MEGO nanosheets to form a sandwich structure. The hybrid of PANI/MEGO (GPANI) exhibit high specific surface area and high electrical conductivity, compared with pristine PANI nanorods. When evaluated as electrodes for supercapacitors, the GPANI demonstrate high specific capacitance of 628 F g(-1) at a current density of 1.1 A g(-1), high-rate performance, and excellent cycle stability compared to individual component. Such excellent electrochemical performance should be attributed to the combined double-layer capacitance and pseudo -capacitance mechanisms from the MEGO sheets and PANI nanorods.
authors.affiliation: School of Physics & Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People's Republic of China.
authors.forename: Zijiong
authors.initials: Z
authors.lastname: Li
authors.forename: Zhen
authors.initials: Z
authors.lastname: Qin
authors.forename: Baocheng
authors.initials: B
authors.lastname: Yang
authors.forename: Jian
authors.initials: J
authors.lastname: Guo
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
authors.forename: Weiyang
authors.initials: W
authors.lastname: Zhang
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Lv
authors.forename: Alison
authors.initials: A
authors.lastname: Stack