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Preparation and characterization of coaxial halloysite/polypyrrole tubular nanocomposites for electrochemical energy storage
來(lái)源:楊超副教授個(gè)人網(wǎng)站 發(fā)布日期:2011-07-07
作者:Chao Yang, Peng Liu, Yongqing Zhao
關(guān)鍵字:Polypyrrole,Supercapacitor,Halloysite,Nanocomposites
論文來(lái)源:期刊
具體來(lái)源:Electrochimica Acta
發(fā)表時(shí)間:2010年

Halloysite nanotubes/polypyrrole (HNTs/PPy) nanocomposites with coaxial tubular morphology for use
as electrode materials for supercapacitors were synthesized by the in situ chemical oxidative poly-
merization method based on self-assembled monolayer amine-functionalized HNTs. The HNTs/PPy
coaxial tubular nanocompositeswere characterizedwith transmission electronmicroscope (TEM), X-ray
diffraction (XRD), thermogravimetric analysis (TGA), electrical conductivity measurement at different
temperatures, cyclic voltammetry (CV), and galvanostatic charge–discharge measurements. The coaxial
tubular nanocomposites showed their greatest conductivity at room temperature and a weak tempera-
ture dependence of the conductivity from298K to 423K. Amaximumdischarge capacity of 522 F/g after
correcting for the weight percent of the PPy phase at a current density of 5mAcm−2 in a 0.5M Na2SO4
electrolyte could be achieved in a half-cell setup con?guration for the HNTs/PPy composites electrode,
suggesting its potential application in electrode materials for electrochemical capacitors.

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