Journal
ELECTROCHIMICA ACTA
Volume 79, Issue -, Pages 117-125Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.06.089
Keywords
Aqueous battery; Lead dioxide; Single electrolyte; Redox couple; Zinc
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Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [623010]
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A zinc-lead dioxide rechargeable cell with an electrolyte composition of 1.5 mol dm(-3) Zn(II), 0.5 mol dm(-3) Na(I) and 0.3 mol dm(-3) sulfuric acid is proposed and tested. The experimental results show that the open circuit potential of the zinc-lead dioxide cell is as high as 2.4V (20% higher than conventional lead-acid cells and 56% higher than recent copper-lead dioxide cells), while the average coulombic and energy efficiencies are 90% and 70%, respectively, over 90 cycles at 20 mA cm(-2). Furthermore, it is shown that the measured specific energy of the zinc-lead dioxide cell in a stack configuration is about 30% larger than that of a commercial valve regulated lead acid cell at the same operating conditions. (C) 2012 Elsevier Ltd. All rights reserved.
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