title: A new insight on the preparation of stabilized alpha-nickel hydroxide nanoparticles.
abstract: 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.
authors.affiliation: Instituto de Química, Universidade de São Paulo, Caixa Postal 26077, CEP 05513-970, São Paulo, SP, Brazil.
authors.forename: Michele A
authors.initials: MA
authors.lastname: Rocha
authors.forename: Herbert
authors.initials: H
authors.lastname: Winnischofer
authors.forename: Koiti
authors.initials: K
authors.lastname: Araki
authors.forename: Fauze J
authors.initials: FJ
authors.lastname: Anaissi
authors.forename: Henrique E
authors.initials: HE
authors.lastname: Toma