Changes in positive lead/acid battery plates during charge/discharge cycling

Roland De Marco; J Jones

doi:10.1023/A:1003886931171

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Changes in positive lead/acid battery plates during charge/discharge cycling

Journal article

Peer reviewed

Changes in positive lead/acid battery plates during charge/discharge cycling

Roland De Marco and J Jones

Journal of Applied Electrochemistry, Vol.30(1), pp.77-83

2000

DOI: https://doi.org/10.1023/A:1003886931171

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Abstract

grid corrosion layer

lead/acid battery

plate passivation

positive active material

premature capacity loss

Active materials and corrosion layers in positive plates of nonantimonial lead/acid batteries, at different stages of charge/discharge cycling, have been characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). In the initial stages of cycling, it has been found that the observed overcharging of cells is responsible for the formation of an underlayer of PbO in the grid corrosion layer, and this blocks the transfer of charge to the current collecting grid, causing rapid capacity loss. In the later stages of cycling at a ratio of capacities for charge and discharge (i.e., C/D) of close to unity, the grid corrosion layer does not possess an underlayer of PbO; however, the active material becomes progressively enriched with respect to insulating lead sulfate. It is suggested that initial overcharging is symbolic of grid corrosion as the rate of gassing side reactions is kept to a minimum by restricting the top-of-charge-voltage (TOCV) to 2.55 V, while sulfation of active material occurring at CID values of about unity is probably attributable to stratification of the electrolyte and its concomitant effect on sulfation of active material.

Details

Title: Changes in positive lead/acid battery plates during charge/discharge cycling
Authors: Roland De Marco (Author) - Curtin University of Technology
J Jones (Author) - Curtin University of Technology
Publication details: Journal of Applied Electrochemistry, Vol.30(1), pp.77-83
Publisher: Springer Netherlands
Date published: 2000
DOI: 10.1023/A:1003886931171
ISSN: 0021-891X
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99448832102621
Output Type: Journal article

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