Light-weight 3D Co-N-doped hollow carbon spheres as efficient electrocatalysts for rechargeable zinc-air batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)10412-10419
Journal / PublicationNanoscale
Volume10
Issue number22
Online published20 Mar 2018
Publication statusPublished - 14 Jun 2018

Abstract

Rational design of cost-effective, nonprecious metal-based catalysts with a desirable oxygen reduction reaction (ORR) performance by a simple and economical synthesis route is a great challenge for the commercialization of future fuel cell and metal-air batteries. Herein, light-weight 3D Co-N-doped hollow carbon spheres (Co-NHCs) have been fabricated via a facile emulsion approach followed by carbonization. The prepared 0.1-Co-NHCs catalyst with suitable Co doping content exhibits favorable ORR catalytic activity (onset potential of 0.99 V and half-wave potential of 0.81 V vs. RHE), comparable to that of commercial Pt-C (onset potential of 1.02 V and half-wave potential of 0.83 V vs. RHE) and rivals that of Pt-C with better cycling stability. The excellent performance of the catalyst is attributed to the synergetic effect of Co and N doping with a high total ratio of active sites, high surface area and good conductivity of the material. More impressively, the assembled rechargeable zinc-air batteries based on the 0.1-Co-NHCs catalyst outperform those afforded by commercial Pt-C. The progress presented in this reported work is of great importance in the development of outstanding non-noble metal based electrocatalysts for the fuel cell and metal-air battery industry.

Citation Format(s)

Light-weight 3D Co-N-doped hollow carbon spheres as efficient electrocatalysts for rechargeable zinc-air batteries. / Chen, Shengmei; Cheng, Junye; Ma, Longtao; Zhou, Shanke; Xu, Xiuwen; Zhi, Chunyi; Zhang, Wenjun; Zhi, Linjie; Zapien, J. Antonio.

In: Nanoscale, Vol. 10, No. 22, 14.06.2018, p. 10412-10419.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review