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- Title
Synthesis and electrochemical performances of a novel two-dimensional nanocomposite: polyaniline-coated laponite nanosheets.
- Authors
Li, Xingwei; Zhou, Min; Xu, Hailing; Wang, Gengchao; Wang, Zhun
- Abstract
A novel two-dimensional nanocomposite, polyaniline-coated laponite (polyaniline/laponite) nanosheets, has been prepared by in situ oxidative polymerization of aniline on the surface of laponite nanosheets. These sheets present a loosely stacked structure with the formation of a great number of pores, which it can provide a larger electrode/electrolyte contact surface area, shorten the path for ions transport in the active material, and alleviate the expansion and contraction of the electrode material during the charge/discharge processes, leading to an improved electrochemical performance. As an active material for supercapacitors, the specific charge/discharge capacitance of polyaniline/laponite nanosheets is 375 and 330 F g (based on the total working electrode mass) at a current density of 0.5 A g, respectively, with a coulombic efficiency of 88 % which is higher than that of pure polyaniline (28 %). Moreover, polyaniline/laponite nanosheets also show a good rate capability with a growth of current density from 0.5 to 30 A g, a specific discharge capacitance of 266 F g remained at 30 A g. This work suggests a strategy to improve the electrochemical performances of polyaniline.
- Subjects
SYNTHESIS of Nanocomposite materials; ELECTRIC properties of nanocomposite materials; AROMATIC amines; CHEMICAL reactions; INTERMEDIATES (Chemistry); POLYMERIZATION
- Publication
Journal of Materials Science, 2014, Vol 49, Issue 19, p6830
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-014-8385-y