A novel flow battery — a lead-acid battery based on an electrolyte with soluble lead(II): part VI. Studies of the lead dioxide positive electrode


Pletcher, Derek, Zhou, Hantao, Kear, Gareth, Low, C.T. John, Walsh, Frank C. and Wills, Richard G.A. (2008) A novel flow battery — a lead-acid battery based on an electrolyte with soluble lead(II): part VI. Studies of the lead dioxide positive electrode. Journal of Power Sources, 180, (1), 630-634. (doi:10.1016/j.jpowsour.2008.02.025).

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Description/Abstract

The structure of thick lead dioxide deposits (approximately 1 mm) formed in conditions likely to be met at the positive electrode during the charge/discharge cycling of a soluble lead-acid flow battery is examined. Compact and well adherent layers are possible with current densities >100 mA cm−2 in electrolytes containing 0.1–1.5 M lead(II) and methanesulfonic acid concentrations in the range 0–2.4 M; the solutions also contained 5 mM hexadecyltrimethylammonium cation, C16H33(CH3)3N+. From the viewpoint of the layer properties, the limitation is stress within the deposit leading to cracking and lifting away from the substrate; the stress appears highest at high acid concentration and high current density. There are, however, other factors limiting the maximum current density for lead dioxide deposition, namely oxygen evolution and the overpotential associated with the deposition of lead dioxide. A strategy for operating the soluble lead-acid flow battery is proposed.

Item Type: Article
ISSNs: 0378-7753 (print)
Keywords: additives, lead dioxide deposition, electroplating conditions, lead-acid battery
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
Divisions: University Structure - Pre August 2011 > School of Chemistry
University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 65436
Date Deposited: 13 Feb 2009
Last Modified: 27 Mar 2014 18:46
URI: http://eprints.soton.ac.uk/id/eprint/65436

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