Impedance peaks of sealed nickel/cadmium cells at low states-of-charge

Suresh, MS and Sathyanarayana, S (1992) Impedance peaks of sealed nickel/cadmium cells at low states-of-charge. In: Journal of Power Sources, 37 (3). pp. 335-345.

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Abstract

The impedance of sealed nickel/cadmium cells is measured at low states-of-charge that correspond to a cell e.m.f. range of 0.0 to 1.3 V. The results show that the impedance exhibits a pronounced maximum between 0.3 and 0.45 V. It is concluded that the impedance maxima are due to physicochemical processes taking place at the nickel oxide electrode. The impedance of the nickel oxide electrode is dominated by three different phenomena: (i) a Ni(II)/Ni(III) reaction between 1.3 and 0.8 V; (ii) a double-layer impedance between 0.8 and 0.3 V; (iii) a hydrogen evolution reaction between 0.3 and 0.0 V.

Item Type:	Journal Article
Publication:	Journal of Power Sources
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	01 Apr 2011 07:15
Last Modified:	18 Feb 2013 09:46
URI:	http://eprints.iisc.ac.in/id/eprint/36321

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