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Performance and polarization studies of the magnesium–antimony liquid metal battery with the use of in-situ reference electrode
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Leung, P. K., Heck, Stenio Cristaldo, Amietszajew, Tazdin, Mohamed, Mohd Rusllim, Conde, Maria, Dashwood, R. J. and Bhagat, Rohit (2015) Performance and polarization studies of the magnesium–antimony liquid metal battery with the use of in-situ reference electrode. RSC Advances , 5 (101). pp. 83096-83105. doi:10.1039/c5ra08606j
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Official URL: http://dx.doi.org/10.1039/C5RA08606J
Abstract
This work presents the performance and polarization studies of a magnesium–antimony liquid metal battery with the use of an in-situ pseudo reference electrode at high operating temperature (ca. 700 °C). Due to the immiscibility of the contiguous salt and metal phases, the battery appears as three distinct layers: (1) positive electrode, (2) electrolyte and (3) negative electrode layers. The configuration of the in-situ reference electrode within the three floating liquid layers is described and is to avoid direct electrical contact/short circuit with the other electrodes. Electrochemical tests, including linear sweep voltammetry, impedance spectroscopy and galvanostatic cycling, evaluate the performance of a magnesium–antimony battery under a range of operating temperatures and current densities. Through the polarization studies, the area resistance of the negative and positive electrodes and the overall battery are found to be ca. 0.55, 0.65 and 1.20 Ω cm−2, respectively. In a typical 1 h charge/discharge per cycle experiment, average voltage efficiencies of ca. 64% are obtained at 60 mA cm−2 with a slight deterioration after subsequent cycles. In these tests, the half-cell measurements also indicate that the sprayed layer of boron nitride at the reference electrode is chemically stable and shown to be an effective electrical insulator for prolonged operation at high temperature (ca. 700 °C).
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) |
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| Journal or Publication Title: | RSC Advances | ||||||||
| Publisher: | Royal Society of Chemistry | ||||||||
| ISSN: | 2046-2069 | ||||||||
| Official Date: | 14 September 2015 | ||||||||
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| Volume: | 5 | ||||||||
| Number: | 101 | ||||||||
| Page Range: | pp. 83096-83105 | ||||||||
| DOI: | 10.1039/c5ra08606j | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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