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

Zhang, Hongzhou; Schmitt, Wolfgang; Maguire, Pierce

doi:http://dx.doi.org/10.1038/srep20704

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

Files

srep20704.pdf (1.87 MB)

Date

2016

Authors

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

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.