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Dependence of Positive Plate Design and Temperature on the Performance of Nickel-Hydrogen Cells
Technical Paper
1999-01-2594
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The capacity and coefficient of utilization of the positive active material of nickel-hydrogen cells show a significant increase when the cells are charged at −20°C or subjected to extended overcharge at 50°C. An interesting aspect of cells in which the positive plates show very high utilization is the appearance of a second wave in the overcharge region. The second wave seems to indicate the formation of a higher-valent nickel. The additional capacity obtained at very low temperature is less stable than that of 10°C when cycled. Destructive physical analysis of these cells reveals increased positive plate swelling. Rapid reaction of oxygen with hydrogen, otherwise known as popping, is more likely to occur in cells that contain positive plates which have endured significant swelling, since swelling occludes the gas channels.
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Citation
Vaidyanathan, H., Earl, M., Scalici, F., and Dunnet, A., "Dependence of Positive Plate Design and Temperature on the Performance of Nickel-Hydrogen Cells," SAE Technical Paper 1999-01-2594, 1999, https://doi.org/10.4271/1999-01-2594.Also In
References
- Dunlop, J. D. Nickel-Hydrogen Batteries Handbook of Batteries Linden, D. New York McGraw Hill 1994 Ch. 32
- Vaidyanathan, H. Robbins, K. B. Rao, G. Effect of KOH Concentration and Anions on the Performance of a Ni-H 2 Battery Positive Plate Journal of Power Sources 63 1996 7 13
- Vaidyanathan, H. Distinctive Features of Storage-Related Capacity Loss in Nickel-Hydrogen Cells IECEC Conference Atlanta, Georgia 1993 Proc. American Chemical Society 1 131 136