Issue 17, 2016
From the journal:

Journal of Materials Chemistry A

Ruthenium oxide coated ordered mesoporous carbon nanofiber arrays: a highly bifunctional oxygen electrocatalyst for rechargeable Zn–air batteries†

Ziyang Guo,a   Chao Li,a   Wangyu Li,a   Hua Guo,a   Xiuli Su,a   Ping He,b   Yonggang Wang*a  and  Yongyao Xiaa  

* Corresponding authors

a Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China
E-mail: ygwang@fudan.edu.cn
Fax: +86-21-51630318
Tel: +86-21-51630318

b Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

Abstract

We synthesized RuO2-coated ordered mesoporous carbon nanofiber arrays (MCNAs) through a natural crab shell template, as a bifunctional catalyst for Zn–air batteries. The uniform RuO2-coating layer and ordered mesopores ensure high electrical conductivity and facilitate ion diffusion, respectively, which provide enough active sites for the ORR/OER; the macro-sized void spaces between carbon nanofibers not only play the role of a buffer in the reactions, but also facilitate oxygen transfer; the uniform RuO2-coating layer ensures catalytic activity and selectivity for catalyzing reactions (ORR and OER), especially the OER. As a result, this Zn–air battery exhibits much improved electrochemical performance, including relatively low overpotentials, long cycle life and superior rate capability.

Graphical abstract: Ruthenium oxide coated ordered mesoporous carbon nanofiber arrays: a highly bifunctional oxygen electrocatalyst for rechargeable Zn–air batteries

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Article information

DOI
https://doi.org/10.1039/C6TA02030E
Article type
Communication
Submitted
09 Mar 2016
Accepted
04 Apr 2016
First published
04 Apr 2016

J. Mater. Chem. A, 2016,4, 6282-6289

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Ruthenium oxide coated ordered mesoporous carbon nanofiber arrays: a highly bifunctional oxygen electrocatalyst for rechargeable Zn–air batteries

Z. Guo, C. Li, W. Li, H. Guo, X. Su, P. He, Y. Wang and Y. Xia, J. Mater. Chem. A, 2016, 4, 6282 DOI: 10.1039/C6TA02030E

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