The mechanism of the formation of positive battery plates from pure lead 1. cyclic voltammetry

✍ Scribed by C. Lazarides; N.A. Hampson; G.M. Bulman

• Book ID: 103899451
• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 632 KB
• Volume: 6
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(81)80008-0

✦ Synopsis

The electrochemical behavlour of a pure lead electrode m sulphurrc acid-perchlonc acid electrolyte mixtures has been exammed by cychc voltammetry. The characteristics in the lead/lead sulphate potential range, and m the lead sulphate/lead dioxide region, have been observed for concentrations of perchlonc acid from 1 to 200mM m 0.5M sulphunc acid.

In the lead/lead sulphate region, the perchlorate ion promotes surface attack on the lead by drsplacmg the passivating sulphate ion. The effect mcreases with perchlorate concentration, reaching a maximum at about 50mM concentration, followed by a 'self-stifling' effect at higher perchlorate levels.

The mechanism m the lead sulphate/lead dioxide region possibly mvolves a reduction m the thickness of the passivatmg layer by the perchlorate anion.