Sheng, L;
Hao, Z;
Feng, J;
Du, W;
Gong, M;
Kang, L;
Shearing, PR;
... Wang, FR; + view all
(2021)
Evaluation and realization of safer Mg-S battery: The decisive role of the electrolyte.
Nano Energy
, 83
, Article 105832. 10.1016/j.nanoen.2021.105832.
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Abstract
The magnesium–sulfur (Mg-S) battery may be a safer alternative for the lithium-sulfur battery because Mg plating usually proceeds without dendrite formation. Here, we correlate the thermal runaway of Mg-S battery with the associated change of electrolyte vapour pressure via battery testing calorimetery. Over-pressure builds up along with the programmed heating of the cell, and as a result, the thermal runaway is triggered at 20 to 45 K over the electrolyte boiling point, corresponding to 70 to 150 kPa pressure difference between the cell and the environment. The distinct performance-safety-cost behaviours of three ether type of electrolytes stems from the different CH_{2}CH_{2}O chain lengths. Such molecular insight will serve as a fundamental guideline in choosing and designing the desired electrolyte that simultaneously achieves a high explosion limit and good electrochemical performance.
| Type: | Article |
|---|---|
| Title: | Evaluation and realization of safer Mg-S battery: The decisive role of the electrolyte |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nanoen.2021.105832 |
| Publisher version: | https://doi.org/10.1016/j.nanoen.2021.105832 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | magnesium-sulfur battery, electrolyte, safety, vapour pressure, thermal runaway |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10120332 |
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