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Rechargeable organic–air redox flow batteries
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Leung, Puiki, Aili, D., Xu, Q., Rodchanarowan, A. and Shah, Akeel A. (2018) Rechargeable organic–air redox flow batteries. Sustainable Energy & Fuels, 2 (10). pp. 2252-2259. doi:10.1039/C8SE00205C ISSN 2398-4902.
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Official URL: http://dx.doi.org/10.1039/C8SE00205C
Abstract
A rechargeable organic–air flow battery based on aqueous electrolytes is proposed and tests are conducted in a divided cell with a three-electrode configuration. Quinoxaline is used as the negative redox couple due to its low electrode potential of c.a. −0.9 V vs. Hg|HgO in aqueous electrolytes. High-surface-area nickel mesh and manganese-dioxide electrodes were employed for oxygen evolution and reduction, respectively, together with a low-cost hydroxide doped polybenzimidazole (m-PBI) separator (c.a. 20 μm). In typical alkaline electrolytes (2 M NaOH), the open-circuit voltage of the flow battery was c.a. 0.95 V, which is comparable to existing organic-based batteries. The average charge and discharge cell voltage ranges at 5–10 mA cm−2 were 1.7–1.95 V and 0.4–0.7 V, respectively. Despite using low-cost materials, average coulombic and energy efficiencies of the batteries were c.a. 81 and 25%, respectively, at 7.5 mA cm−2 over 20 cycles.
Item Type: | Journal Article | ||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Library of Congress Subject Headings (LCSH): | Flow batteries , Storage batteries, Electrolytes, Quinoxalines | ||||||||
Journal or Publication Title: | Sustainable Energy & Fuels | ||||||||
Publisher: | RSC | ||||||||
ISSN: | 2398-4902 | ||||||||
Official Date: | 1 October 2018 | ||||||||
Dates: |
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Volume: | 2 | ||||||||
Number: | 10 | ||||||||
Page Range: | pp. 2252-2259 | ||||||||
DOI: | 10.1039/C8SE00205C | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 10 September 2018 | ||||||||
Date of first compliant Open Access: | 3 August 2019 |
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