A new type of porous graphite foams and their integrated composites with oxide/polymer core/shell nanowires for supercapacitors: structural design, fabrication, and full supercapacitor demonstrations
Date
2014
Authors
Xia, X.
Chao, D.
Fan, Z.
Guan, C.
Cao, X.
Zhang, H.
Fan, H.J.
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Journal article
Citation
Nano Letters, 2014; 14(3):1651-1658
Statement of Responsibility
Xinhui Xia, Dongliang Chao, Zhanxi Fan, Cao Guan, Xiehong Cao, Hua Zhang, Hong Jin Fan
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Abstract
We attempt to meet the general design requirements for high-performance supercapacitor electrodes by combining the strategies of lightweight substrate, porous nanostructure design, and conductivity modification. We fabricate a new type of 3D porous and thin graphite foams (GF) and use as the light and conductive substrates for the growth of metal oxide core/shell nanowire arrays to form integrated electrodes. The nanowire core is Co3O4, and the shell is a composite of conducting polymer (poly(3,4-ethylenedioxythiophene), PEDOT) and metal oxide (MnO2). To show the advantage of this integrated electrode design (viz., GF + Co3O4/PEDOT–MnO2 core/shell nanowire arrays), three other different less-integrated electrodes are also prepared for comparison. Full supercapacitor devices based on the GF + Co3O4/PEDOT–MnO2 as positive electrodes exhibit the best performance compared to other three counterparts due to an optimal design of structure and a synergistic effect.
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© 2014 American Chemical Society