Voltammetric Characteristics of Smooth Lead Electrodes in Sulfuric Acid and Tydrolyte™ Solutions Part 1. The PbSO₄/PbO₂potential Region

Abstract

The electrochemical behavior of a smooth lead electrode was compared in a 1.265 g•mL-1commercial electrolyte replacement called Tydrolyte™ and a standard1.265 g•mL-1sulfuric acid solution in order to simulate the operating conditions of the positive grid of a lead-acid battery. Using potentiodynamic sweeps and cyclic voltammetry techniques in the entire potential region where the positive plate of the battery operates, it was found that for the lead-Tydrolyte electrode system the same reactions take place as for lead in sulfuric acid solution, i.e. the new electrolyte does not change the thermodynamics of the lead-sulfuric acid electrode system and no new, specific to Tydrolyte reactions are taking place -- qualitatively, the new electrolyte is not different from a regular sulfuric acid solution. It was observed, however, that Tydrolyte lowers the formation and growth rate of the anodic layer on the smooth electrode (quite similar to the corrosion layer of battery grids), as well as the rate of the oxygen evolution reaction, i.e. it affects the kinetics of the electrode reactions and indicates the possible cause for water loss reduction in batteries.

Department(s)

Materials Science and Engineering

Research Center/Lab(s)

Center for Research in Energy and Environment (CREE)

Second Research Center/Lab

Intelligent Systems Center

International Standard Serial Number (ISSN)

2352-152X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2020 Elsevier, All rights reserved.

Publication Date

01 Apr 2020

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