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A Novel Polyaniline Nanowire Arrays/Three‐Dimensional Graphene Composite for Supercapacitor
Author(s) -
Gao Xin,
Zhang Hengwei,
Yue Hongyan,
Yao Fei,
Zhang Xiaohua,
Guo Erjun,
Ma Yingyi,
Wang Zengze,
Wang Yuanbo
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002801
Subject(s) - supercapacitor , materials science , graphene , polyaniline , composite number , capacitance , nanowire , chemical vapor deposition , nanotechnology , conductivity , electrode , current density , in situ polymerization , nanoparticle , polymerization , composite material , polymer , chemistry , physics , quantum mechanics
It is an effective way to obtain high performance supercapacitors by increasing the surface area and conductivity of electrode materials. In this paper, three‐dimensional (3D) graphene with a small pore size, good electrical conductivity and high mechanical strength is fabricated by chemical vapor deposition using nickel nanoparticles as the template. Then, a polyaniline nanowire arrays (PANI NWAs)/3D graphene composite is fabricated by in‐situ polymerization. Due to the high conductivity and unique nano‐structure, the as‐prepared PANI NWAs/3D graphene composite exhibits an excellent capacitance of 680 F g −1 at current density of 1 A g −1 . Moreover, a symmetric supercapacitor based on the PANI NWAs/3D graphene composite is assembled, and it shows an energy density of 6.43 Wh kg −1 at a power density of 0.4 kW kg −1 . The assembled supercapacitor also exhibits a good cycling stability, which retains 78 % of its initial specific capacitance after 1000 cycles.