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Enhanced Capacitive Properties of Manganese Dioxide Nanowires Coating with Polyaniline by in situ Polymerization

Published online by Cambridge University Press:  04 February 2014

Lihao Wu ,
Yingzhi Li ,
Pingping Yu  and
Qinghua Zhang
Lihao Wu
Affiliation:
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China Jiangsu Laboratory of Advanced Functional Material, College of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu Province, 215500, China
Yingzhi Li
Affiliation:
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Pingping Yu
Affiliation:
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
Qinghua Zhang
Affiliation:
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
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Abstract

Among the transition metal oxides, manganese oxides have been widely studied for electrochemical capacitors and batteries, because of their high energy density, low cost, natural abundance and environmentally friendliness. However, the poor electrical conductivity of manganese dioxide (MnO2) limits its capacitive response. Polyaniline becomes a unique and promising conducting polymer with a great potential application in supercapacitors due to easy synthesis and good conductivity of the conducting material. Combine the two properties can prepare nanocomposite materials in order to improve the conductivity and capacitive performance of the MnO2. MnO2 coated with polyaniline as the coaxial nanowires were prepared in this report. The polyaniline was synthesized via in situ polymerization and we got a controllable thin coating on the well-dispersed MnO2 nanowires. This hybrid nanostructure enhances the conductivity and capacitive performance of the supercapacitor electrode. The specific capacitance of MnO2/PANI composites is as high as 426 F g-1 at 1 A g-1, which is twice much higher than pure MnO2 (188 F g-1) .

Keywords

oxidenanostructurepolymerization
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1659: Symposium SS/XX – Micro- and Nanoscale Systems – Novel Materials, Structures and Devices , 2014 , pp. 163 - 168
Copyright
Copyright © Materials Research Society 2014 

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References

Notes and Reference

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