Membrane-Less Hybrid Flow Battery Based on Low-Cost Elements

Leung, P. K. and Martin, T. and Shah, A. A. and Mohd Rusllim, Mohamed and Anderson, M. A. and Palma, J. (2017) Membrane-Less Hybrid Flow Battery Based on Low-Cost Elements. Journal of Power Sources, 341. pp. 36-45. ISSN 0378-7753. (Published)

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The capital cost of conventional redox flow batteries is relatively high (>USD$ 200/kWh) due to the use of expensive active materials and ion-exchange membranes. This paper presents a membrane-less hybrid organic-inorganic flow battery based on the low-cost elements zinc (<USD$ 3 Kg−1) and para-benzoquinone (<USD$ 8 Kg−1). Redox potential and voltammetric studies show that the open-circuit voltage of the battery is 1.17–1.59 V over a wide range of pH. Half-cell charge-discharge and dissolution experiments indicate that the negative electrode reaction is limiting due to the presence of chemical side reactions on the electrode surface. The positive electrode redox reactions are not affected and exhibit (half-cell) coulombic efficiencies of >92.7% with the use of carbon felt electrodes. In the presence of a fully oxidized active species close to its solubility limit, dissolution of the deposited anode is relatively slow (<2.37 g h−1 cm−2) with an equivalent corrosion current density of <1.9 mA cm−2. In a parallel plate flow configuration, the resulting battery was charge-discharge cycled at 30 mA cm−2 with average coulombic and energy efficiencies of c.a. 71.8 and c.a. 42.0% over 20 cycles, respectively.

Item Type: Article
Uncontrolled Keywords: Flow battery; Para-benzoquinone; Hybrid; Low cost; Membrane-less
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Faculty of Electrical & Electronic Engineering
Depositing User: Noorul Farina Arifin
Date Deposited: 20 Feb 2017 03:21
Last Modified: 07 Mar 2018 03:42
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