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Nature Research, Scientific Reports, 1(6), 2016

DOI: 10.1038/srep20704

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Enhancing capacitance behaviour of CoOOH nanostructures using transition metal dopants by ambient oxidation

Journal article published in 2016 by Yanhui Chen, Junfeng Zhou, Pierce Maguire ORCID, Robert O’Connell, Wolfgang Schmitt, Yonghe Li, Zhengguang Yan, Yuefei Zhang, Hongzhou Zhang
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractCobalt hydrate and doped binary Co0.9M0.1OOH (M = Ni, Mn, Fe) nanorings of 100–300 nm were fabricated in solution through a facile ambient oxidation method. A transformation from Co0.9Ni0.1(OH)2 nanodiscs to hollow Co0.9Ni0.1OOH nanorings was observed with prolonged reaction time. Core-shell nanodiscs have elemental segregation with a Co(OH)2 core and Ni(OH)2 shell. Co0.9Ni0.1OOH nanorings displayed a higher electrochemical capacitance than Mn and Fe doped nanorings materials or materials with disc-like geometries.