Issue 13, 2016

Fibrous polyaniline@manganese oxide nanocomposites as supercapacitor electrode materials and cathode catalysts for improved power production in microbial fuel cells

Abstract

Fibrous Pani–MnO2 nanocomposite were prepared using a one-step and scalable in situ chemical oxidative polymerization method. The formation, structural and morphological properties were investigated using a range of characterization techniques. The electrochemical capacitive behavior of the fibrous Pani–MnO2 nanocomposite was examined by cyclic voltammetry and galvanostatic charge–discharge measurements using a three-electrode experimental setup in an aqueous electrolyte. The fibrous Pani–MnO2 nanocomposite achieved high capacitance (525 F g−1 at a current density of 2 A g−1) and excellent cycling stability of 76.9% after 1000 cycles at 10 A g−1. Furthermore, the microbial fuel cell constructed with the fibrous Pani–MnO2 cathode catalyst showed an improved power density of 0.0588 W m−2, which was higher than that of pure Pani and carbon paper, respectively. The improved electrochemical supercapacitive performance and cathode catalyst performance in microbial fuel cells were attributed mainly to the synergistic effect of Pani and MnO2 in fibrous Pani–MnO2, which provides high surface area for the electrode/electrolyte contact as well as electronic conductive channels and exhibits pseudocapacitance behavior.

Graphical abstract: Fibrous polyaniline@manganese oxide nanocomposites as supercapacitor electrode materials and cathode catalysts for improved power production in microbial fuel cells

Supplementary files

Article information

Article type
Paper
Submitted
29 ربيع الأول 1437
Accepted
05 جمادى الأولى 1437
First published
02 جمادى الثانية 1437

Phys. Chem. Chem. Phys., 2016,18, 9053-9060

Fibrous polyaniline@manganese oxide nanocomposites as supercapacitor electrode materials and cathode catalysts for improved power production in microbial fuel cells

S. A. Ansari, N. Parveen, T. H. Han, M. O. Ansari and M. H. Cho, Phys. Chem. Chem. Phys., 2016, 18, 9053 DOI: 10.1039/C6CP00159A

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