Due to its rheological properties, positive lead-acid battery paste can be difficult to spread on lead current collectors accurately and efficiently under industry machinery and setting. Sodium polymethacrylate dispersant was studied as an effective positive paste additive that could lower the yield stress of the paste without affecting paste density and battery performance. Under a four-blade vane rheometer setup, stress growth and oscillatory amplitude strain sweep experiments evaluated the rheological properties of positive paste with the addition of varying amounts of sodium polymethacrylate. Further, the electrochemical effects of sodium polymethacrylate were also evaluated in 2V batteries by testing positive active material utilization and cycle life.
J. Kosacki et al., "The Effect of Sodium Polymethacrylate on the Rheology of the Positive Paste and Performance of the Lead-Acid Battery," International Journal of Applied Ceramic Technology, vol. 19, no. 4, pp. 2029 - 2035, Wiley, Jul 2022.
The definitive version is available at https://doi.org/10.1111/ijac.14024
Civil, Architectural and Environmental Engineering
Materials Science and Engineering
Keywords and Phrases
additive; dispersant; lead-acid battery; paste; rheology; sodium polymethacrylate
International Standard Serial Number (ISSN)
Article - Journal
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01 Jul 2022