Horia, R., Nguyen, D., Eng, A. Y. S., & Seh, Z. W. (2022). Comparative Study of Conventional Electrolytes for Rechargeable Magnesium Batteries. Batteries & Supercaps. Portico. https://doi.org/10.1002/batt.202200011
Conventional magnesium salts are generally considered to be passivating to the magnesium anode, hence chloride-based electrolyte additives are often added to circumvent this issue. As a result, the performance of conventional magnesium salts has rarely been assessed in a chloride-free system. This work provides a comparative study on the electrochemical performance and interfacial reaction of four commercially available magnesium salts with tetrabutylammonium borohydride as moisture scavenger. Magnesium bis(hexamethyldisilazide) was found to be the most reductively stable and enabled excellent magnesium plating/stripping without chloride additive. Investigation of the solid electrolyte interphase revealed a thin organic polyether layer that was conducive to magnesium-ion migration. The results also showed that a minuscule amount of chloride (20 mM) improved the reversibility of magnesium plating/stripping but was still corrosive towards the current collector, thus establishing that chloride-free electrolyte is most appropriate for future development of rechargeable magnesium batteries.
This research / project is supported by the Singapore National Research Foundation - NRF Fellowship
Grant Reference no. : NRF-NRFF2017-04
This research is supported by core funding from: Central Research Fund Award
Grant Reference no. : NA
This is the peer reviewed version of the following article: Horia, R., Nguyen, D., Eng, A. Y. S., & Seh, Z. W. (2022). Comparative Study of Conventional Electrolytes for Rechargeable Magnesium Batteries. Batteries & Supercaps. Portico. https://doi.org/10.1002/batt.202200011, which has been published in final form at doi.org/10.1002/batt.202200011. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.