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

Zhang, Hongzhou; Schmitt, Wolfgang; Maguire, Pierce

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PDF

Item Type:

Journal Article

Date:

2016

Author:

Zhang, Hongzhou

Schmitt, Wolfgang

Maguire, Pierce

Access:

openAccess

Citation:

Chen, Yanhui, Zhou, Junfeng, Maguire, Pierce, O'Connell, Robert, Schmitt, Wolfgang, Li, Yonghe, Yan, Zhengguang, Zhang, Yuefei, Zhang, Hongzhou, Enhancing capacitance behaviour of CoOOH nanostructures using transition metal dopants by ambient oxidation, Scientific Reports, 6, 2016, 20704

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Abstract:

Cobalt 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.