کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1285915 973164 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and enhanced capacitance of core–shell polypyrrole/polyaniline composite electrode for supercapacitors
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Preparation and enhanced capacitance of core–shell polypyrrole/polyaniline composite electrode for supercapacitors
چکیده انگلیسی

Polypyrrole (PPy) nanotubes were synthesized by using the complex of methyl orange (MO)/FeCl3 as a template. Then the core–shell polypyrrole/polyaniline (PPy/PANI) composite was prepared by in situ chemical oxidation polymerization of aniline on the surface of PPy nanotubes. The morphology and molecular structure were characterized by transmission electron microscopy (TEM), infrared spectroscopy (IR) and X-ray diffraction (XRD). TEM images confirmed that the composite was core–shell nanotubes. The electrochemical properties of the PPy/PANI composite electrode were investigated by cyclic voltammetry (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS). The electrochemical experiments showed that the specific capacitance of the PPy/PANI composite was 416 F g−1 in 1 M H2SO4 electrolyte and 291 F g−1 in 1 M KCl electrolyte. Furthermore, the composite electrode exhibited a good rate capability and maintained 91% of initial capacity at a current density of 15 mA cm−2 in 1 M H2SO4 electrolyte.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 176, Issue 1, 21 January 2008, Pages 403–409
نویسندگان
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