Worm-like amorphous MnO2 nanowires grown on textiles for high-performance flexible supercapacitors

Peihua Yang; Yuzhi Li; Ziyin Lin; Yong Ding; Song Yue; Ching Ping Wong; Xiang Cai; Shaozao Tan; Wenjie Mai

doi:10.1039/C3TA14275B

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Worm-like amorphous MnO₂ nanowires grown on textiles for high-performance flexible supercapacitors†

Peihua Yang,‡^a Yuzhi Li,‡^a Ziyin Lin,^b Yong Ding,^b Song Yue,^a Ching Ping Wong,^b Xiang Cai,^c Shaozao Tan^c and Wenjie Mai*^ab

Author affiliations

* Corresponding authors

^a Department of Physics and Siyuan Laboratory, Jinan University, Guangzhou, Guangdong 510632, China
E-mail: wenjiemai@gmail.com

^b School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

^c Department of Chemistry, Jinan University, Guangzhou, Guangdong 510632, China

Abstract

A novel class of amorphous MnO₂ nanowires with a worm-like (WL) nanostructure was prepared by electrodeposition and a possible formation mechanism was proposed. The specific capacitance of WL amorphous MnO₂ was 2–3 times larger than that of its crystalline cotton-like MnO₂ counterpart. The unique WL amorphous nanostructure is believed to significantly facilitate the electrochemical performance of MnO₂. Flexible solid-state symmetric supercapacitors assembled with WL-MnO₂ electrodes exhibited a high energy density of 6.3 W h kg⁻¹. These results demonstrate that the amorphous WL nanostructure grown on carbon fabric can serve as a promising electrode material for flexible and portable energy storage devices.

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Article information

DOI: https://doi.org/10.1039/C3TA14275B
Article type: Communication
Submitted: 22 Oct 2013
Accepted: 24 Oct 2013
First published: 24 Oct 2013

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J. Mater. Chem. A, 2014,2, 595-599

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Worm-like amorphous MnO₂ nanowires grown on textiles for high-performance flexible supercapacitors

P. Yang, Y. Li, Z. Lin, Y. Ding, S. Yue, C. P. Wong, X. Cai, S. Tan and W. Mai, J. Mater. Chem. A, 2014, 2, 595 DOI: 10.1039/C3TA14275B

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Journal of Materials Chemistry A