Ageing of magnesium/manganese dioxide primary cells

Kumar, Girish G and Munichandraiah, N (2001) Ageing of magnesium/manganese dioxide primary cells. In: Journal of Solid State Electrochemistry, 5 (1). pp. 8-16.

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Abstract

$Mg/MnO_{2}$ primary cells which were more than a decade old were investigated for their discharge capacity, a.c. impedance behaviour, delay time, effect of added water into the cell and effect of temperature. Although the cells were aged for a long duration, they were electrochemically active and yielded good discharge capacity, thus suggesting an extraordinary long shelf-life. There was a marginal increase in cell capacity subsequent to injection of 2 ml of water into a CD-size $Mg/ MnO_{2}$ cell. The a.c. impedance of a partially discharged cell included the contributions of surface passive film on the ME anode and corrosion of the Mg metal. The internal resistance of the cell was found to increase with storage time, suggesting that the resistance of a fresh cell also could similarly increase. By increasing the cell temperature, the impedance decreased considerably and also the delay time. These results suggested that the increase of temperature had favourable effects on the performance of the aged $Mg/MnO_{2}$ cells.

Item Type:	Journal Article
Publication:	Journal of Solid State Electrochemistry
Publisher:	Springer Verlag
Additional Information:	Copyright for this article belongs to Springer Verlag.
Keywords:	Magnesium/manganese dioxide cell;Ageing;Delay time;Temperature effect;A.C. impedance
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	18 Jan 2007
Last Modified:	19 Sep 2010 04:16
URI:	http://eprints.iisc.ac.in/id/eprint/1950

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