On the Practical Applications of the Magnesium Fluorinated Alkoxyaluminate Electrolyte in Mg Battery Cells

Tjaša Pavčnik, Matic Lozinšek, Klemen Pirnat, Alen Vizintin, Toshihiko Mandai, Doron Aurbach, Robert Dominko, Jan Bitenc

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

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]2salt 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]2salt exemplifies an improved performance of electrolytes comprising the Mg[Al(hfip)4]2salt and establishes Mg[Al(hfip)4]2as a new standard salt for the future Mg battery research.

Original languageEnglish
Pages (from-to)26766-26774
Number of pages9
JournalACS applied materials & interfaces
Volume14
Issue number23
DOIs
StatePublished - 15 Jun 2022

Bibliographical note

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Keywords

  • Chevrel phase
  • Mg battery cells
  • electrolyte compatibility
  • organic cathode
  • sulfur

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