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Capacitive performance of polyaniline/manganese dioxide nanofiber microsphere
Author(s) -
Huo YuQiu,
Zhang ShuBo,
Zhang HaiYing
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40575
Subject(s) - polyaniline , materials science , scanning electron microscope , nanofiber , chemical engineering , differential scanning calorimetry , dielectric spectroscopy , fourier transform infrared spectroscopy , capacitance , polyaniline nanofibers , analytical chemistry (journal) , electrochemistry , nanotechnology , electrode , composite material , chemistry , polymer , organic chemistry , physics , engineering , polymerization , thermodynamics
This work has obtained polyaniline/manganese dioxide (PANI/MnO 2 ) nanofibers microsphere by interfacial chemical synthesis with 4‐amino‐thiophenol (4‐ATP) as the structure‐directing agent on the Au substrate. The cyclic voltammograms, galvanostatic charge–discharge, and electrochemical impedance spectroscopy were used to determine their capacitive performance. Powder X‐ray diffraction, thermogravimetry and differential scanning calorimetry, Fourier transformed infrared spectroscopy, Brunauer–Emmett–Teller surface area measurements, and scanning electron microscope were performed for physical and chemical characterization. The effect of 4‐ATP and acids on the capacitive performance of PANI/MnO 2 nanofibers microsphere was elucidated. The as‐prepared PANI/MnO 2 was nanofiber about 30 nm diameters, and they further self‐assembled into sphere. Its specific capacitance is up to 765 F g −1 at 1.0 mA cm −2 in 1.0 M Na 2 SO 4 solution. And it shows a high stability with a capacitance fade of only 14.9% after 400 charge–discharge cycles. The symmetric capacitor of PANI/MnO 2 (PM10+)/PANI/MnO 2 (PM10−) is assembled in 1.0 M Na 2 SO 4 solution, and its capacitive performance is compared with that of PANI (+)/PANI (−) and MnO 2 (+)/MnO 2 (−). © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40575.