The effect of a lignosulphate type additive on the lead—acid battery positive plate reactions

✍ Scribed by S.E. Ovuru; J.A. Harrison

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 868 KB
• Volume: 27
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(89)80039-4

✦ Synopsis

The electrochemical formation of lead dioxide has been investigated at a lead electrode in a 5 M sulphuric acid solution, and in the presence of phosphoric acid and lignosulphate-type additive. The formation of lead dioxide from lead sulphate, and the reverse reaction, have been investigated by the linear potential sweep method, by an impedance method in which the impedance was measured at the end of each pulse during a potential pulse train, and by a charging curve method in which the current and charge was measured during a similar potential pulse train. The charge measurements prove that the main effect of the additive is to decrease the accompanying oxygen evolution reaction. The impedance measurements, however, show that the additive has a small but significant effect on the structure of the solid lead sulphate and lead dioxide layers.