Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.104
Publication date: 18th December 2023
Magnesium and calcium batteries are considered promising post-Li battery technologies due to the high gravimetric and volumetric densities of metal anodes, their low redox potentials (–2.37 V and –2.87 V vs. SHE, respectively), and natural abundance, which is an important factor in terms of price and sustainability. The main challenge is the development of suitable electrolytes that enable reversible plating/stripping of Mg/Ca with high Coulombic efficiency in a wide potential window, while also being compatible with the metal anode and cathode materials.
In our recent work, we explore the field of advanced electrolytes based on alkoxyborates and alkoxyaluminates. Different salts were synthesized by exchanging hfip ligands for a variety of alcohols with different sterical properties, number of binding groups, and degree of fluorination. A variety of electrolytes for both systems are studied by physicochemical and electrochemical characterization.
The application of new salts along with some additives will be discussed along with the importance of proper electrochemical wiring of cathode composite containing polymerized redox active organic moieties.
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