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

Cobalt hydrate and doped binary Co(0.9)M(0.1)OOH (M = Ni, Mn, Fe) nanorings of 100–300 nm were fabricated in solution through a facile ambient oxidation method. A transformation from Co(0.9)Ni(0.1)(OH)(2) nanodiscs to hollow Co(0.9)Ni(0.1)OOH nanorings was observed with prolonged reaction time. Core...

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Detalles Bibliográficos
Autores principales: Chen, Yanhui, Zhou, Junfeng, Maguire, Pierce, O’Connell, Robert, Schmitt, Wolfgang, Li, Yonghe, Yan, Zhengguang, Zhang, Yuefei, Zhang, Hongzhou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4745070/
https://www.ncbi.nlm.nih.gov/pubmed/26853105
http://dx.doi.org/10.1038/srep20704
Descripción
Sumario:Cobalt hydrate and doped binary Co(0.9)M(0.1)OOH (M = Ni, Mn, Fe) nanorings of 100–300 nm were fabricated in solution through a facile ambient oxidation method. A transformation from Co(0.9)Ni(0.1)(OH)(2) nanodiscs to hollow Co(0.9)Ni(0.1)OOH nanorings was observed with prolonged reaction time. Core-shell nanodiscs have elemental segregation with a Co(OH)(2) core and Ni(OH)(2) shell. Co(0.9)Ni(0.1)OOH nanorings displayed a higher electrochemical capacitance than Mn and Fe doped nanorings materials or materials with disc-like geometries.

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