文献类型：期刊文献

英文题名：Synthesis and electrochemical performances of a novel two-dimensional nanocomposite: polyaniline-coated laponite nanosheets

作者：Li, Xingwei[1];Zhou, Min[1];Xu, Hailing[1];Wang, Gengchao[1];Wang, Zhun[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2014

卷号：49

期号：19

起止页码：6830

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：;EI(收录号：20143117997759);WOS:【SCI-EXPANDED(收录号:WOS:000339337600039)】；

基金：The authors are grateful for the financial support from Shanghai Leading Academic Discipline Project (B502) and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Electric discharges - Electrochemical electrodes - Nanosheets - Nanocomposites - Capacitance

摘要：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(-1) (based on the total working electrode mass) at a current density of 0.5 A g(-1), 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(-1), a specific discharge capacitance of 266 F g(-1) remained at 30 A g(-1). This work suggests a strategy to improve the electrochemical performances of polyaniline.