On the practical applications of the magnesium fluorinated alkoxyaluminate electrolyte in Mg battery cells

Pavčnik, Tjaša (author), Lozinšek, Matic (author), Pirnat, Klemen (author), Vižintin, Alen (author), Mandai, Toshihiko (author), Aurbach, Doron (author), Dominko, Robert (author), Bitenc, Jan (author)

High-performance electrolytes are at the heart of magnesium battery development. Long-term stability along with the low potential difference between plating and stripping processes are needed to consider them for next-generation battery devices. Within this work, we perform an in-depth characterization of the novel Mg[Al(hfip)$_4$]$_2$ salt in different glyme-based electrolytes. Specific importance is given to the influence of water content and the role of additives in the electrolyte. Mg[Al(hfip)$_4$]$_2$-based electrolytes exemplify high tolerance to water presence and the beneficial effect of additives under aggravated cycling conditions. Finally, electrolyte compatibility is tested with three different types of Mg cathodes, spanning different types of electrochemical mechanisms (Chevrel phase, organic cathode, sulfur). Benchmarking with an electrolyte containing a state-of-the-art Mg[B(hfip)$_4$]$_2$ salt exemplifies an improved performance of electrolytes comprising the Mg[Al(hfip)$_4$]$_2$ salt and establishes Mg[Al(hfip)$_4$]$_2$ as a new standard salt for the future Mg battery research.

• Language: English
• Keywords: Mg battery cells, Chevrel phase, organic cathode, sulfur, electrolyte compatibility, electrochemical cells, electrodes, electrolytes, metals, salts
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 26766–26774
• Numbering: Vol. 14, iss. 23
• PID: 20.500.12556/RUL-140641
• UDC: 54
• ISSN on article: 1944-8244
• DOI: 10.1021/acsami.2c05141
• COBISS.SI-ID: 110333699
• Publication date in RUL: 16.09.2022

Record is a part of a journal

• Title: ACS applied materials & interfaces
• Shortened title: ACS appl. mater. interfaces
• Publisher: American Chemical Society
• ISSN: 1944-8244
• COBISS.SI-ID: 14731286

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.