Original scientific paper

Structural and Electrochemical Characteristics of Sintered Nickel Electrodes

Eleonora Maria Rus ; Department of Physical Chemistry, Faculty of Chemistry and Chemical Engineering of »Babes-Bolyai« University, 11 Arany Janos, 3400, Cluj-Napoca, Romania
Delia Maria Constantin ; Department of Physical Chemistry, Faculty of Chemistry and Chemical Engineering of »Babes-Bolyai« University, 11 Arany Janos, 3400, Cluj-Napoca, Romania
Liviu Oniciu ; Department of Physical Chemistry, Faculty of Chemistry and Chemical Engineering of »Babes-Bolyai« University, 11 Arany Janos, 3400, Cluj-Napoca, Romania
Lucretia Ghergari ; Department of Physical Chemistry, Faculty of Chemistry and Chemical Engineering of »Babes-Bolyai« University, 11 Arany Janos, 3400, Cluj-Napoca, Romania

Abstract

Sintered nickel electrodes were prepared from nickel powder ob-tained by thermolysis of Ni(NO₃)₂ ⋅ 6H₂O and by reduction of formed oxides in controlled atmosphere and electrochemical activa-tion in 42% KOH solution. Scanning electron microscopy, X-ray diffraction and cyclic voltammetry were used to investigate the structural and electrochemical characteristics of the prepared electrodes. The diffusion coefficients of the proton in nickel hydroxide were determined. It has been found that the proton diffusion coefficient is higher for the oxidation process in 6 M KOH + 35 g/L LiOH than in 6 M KOH electrolyte. The characteristics and the performance of the prepared sintered nickel electrodes point to the possibility of their successful utilisation as cathodes in alkaline batteries.

Keywords

Hrčak ID:

132131

URI

https://hrcak.srce.hr/132131

Publication date:

1.3.1999.

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