Cell/dendrite transition and electrochemical corrosion of Pb–Sb alloys for lead-acid battery applications
| Autor: | Leandro C. Peixoto, Amauri Garcia, Wislei R. Osório, Daniel M. Rosa |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Alloy Metallurgy Energy Engineering and Power Technology engineering.material Electrochemistry Corrosion Dielectric spectroscopy Dendrite (crystal) engineering Electrical and Electronic Engineering Physical and Theoretical Chemistry Lead–acid battery Current density |
| Zdroj: | Journal of Power Sources. 196:6567-6572 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2011.03.050 |
| Popis: | The aim of this article is focused on a comparative experimental study of the electrochemical feature of as-cast Pb–2.2 wt.% Sb alloy with cellular/dendritic transition for applications in the manufacturing of lead-acid battery parts. A water-cooled unidirectional solidification system is used to obtain the alloy samples. Electrochemical impedance spectroscopy (EIS) plots, potentiodynamic polarization curves and equivalent circuit analysis are used to evaluate corrosion resistance in a 0.5 M H 2 SO 4 solution at 25 °C. The cellular Pb–2.2 wt.% Sb alloy is found to have a current density which is of about 3 times lower than that of the dendritic Pb–2.2 wt.% Sb alloy. The Pb–2.2 wt.% Sb alloy has lower current density than both the Pb–1 wt.% Sb and the Pb–6.6 wt.% Sb alloys evidencing its potential for application as positive grid material in lead-acid batteries. It is also verified that a conventional casting with low cooling rate of about 0.6 °C s −1 produces coarser cellular spacings which is more appropriate for the manufacturing of the Pb–2.2 wt.% Sb alloys grids due to its corresponding electrochemical behavior. |
| Databáze: | OpenAIRE |
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