A New Insight on the Preparation of Stabilized Alpha-Nickel Hydroxide Nanoparticles
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2011
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Resumo |
Nickel hydroxide can provide an outstanding cathode material in alkaline secondary batteries, however the progressive decrease of the charge capacity as a function of the number of oxidation/reduction cycles is a challenging problem to be solved. New improvements on the electrochemical properties of electrode materials can be achieved by exploiting the much better performance of alpha-nickel hydroxide. Such materials were obtained in a stable form by sol-gel method and characterized by thermogravimetric analyses, UV-Vis spectroscopy, X-ray diffractometry, scanning and transmission electron microscopy, cyclic voltammetry and electrochemical quartz crystal microbalance techniques. The results revealed not only the formation of the alpha-Ni(OH)(2) phase, but also a much better electrochemical reversibility and stability as compared with similar materials obtained by electrochemical precipitation method. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Conselho Nacional de Desenvolvimento Cientifico e Technologico (CNPq) |
Identificador |
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, n.5, p.3985-3996, 2011 1533-4880 http://producao.usp.br/handle/BDPI/31371 10.1166/jnn.2011.3872 |
Idioma(s) |
eng |
Publicador |
AMER SCIENTIFIC PUBLISHERS |
Relação |
Journal of Nanoscience and Nanotechnology |
Direitos |
closedAccess Copyright AMER SCIENTIFIC PUBLISHERS |
Palavras-Chave | #Nickel Hydroxide #Nanoparticles #Sol-Gel #Electrochemistry #QUARTZ-CRYSTAL MICROBALANCE #SOL-GEL PROCESS #ELECTROCHEMICAL PERFORMANCE #ACTIVE MATERIAL #RECHARGEABLE BATTERIES #ELECTRODE MATERIALS #POSITIVE-ELECTRODE #OXYGEN EVOLUTION #REDOX BEHAVIOR #PHASE #Chemistry, Multidisciplinary #Nanoscience & Nanotechnology #Materials Science, Multidisciplinary #Physics, Applied #Physics, Condensed Matter |
Tipo |
article original article publishedVersion |