EFFECT OF COBALT ELECTROLESS DEPOSITION ON NICKEL HYDROXIDE ELECTRODES

ORTIZ M. G., CASTRO E. B. AND REAL S. G

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2014 p. 6006 - 6012

0360-3199

The effects of cobalt additive on the positive electrode surface of nickel alkaline batteries are investigated. Electrode surface modifications by electroless cobalt deposits were made at different immersion times. The performance of nickel hydroxide electrodes was studied by optical techniques, such as scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX) and electrochemical methods as cyclic voltammetry, charge-discharge curves and electrochemical impedance spectroscopy (EIS). According to these results, electroless cobalt deposits obtained with 5 minutes of immersion time in the electroless-bath exhibit a better electrode performance.