Magnesium metal batteries are currently researched as a potential beyond Li-ion electrochemical energy storage system. Magnesium metal is attractive as an anode material due to its high volumetric energy storage density and the widespread abundance of magnesium. Solid polymer electrolytes for magnesium batteries are of interest to increase thermal and electrochemical stability. One of the most important challenges with polymer electrolytes is to improve the ionic conductivity, which is low relative to that of liquid electrolytes. The challenge of overcoming low cation transference is also important in magnesium-based systems, due to the divalent nature of magnesium cations. In order to develop strategies to improve magnesium transport in solid polymer electrolytes, rigorous investigation and characterization of these systems is needed. Recently, it has been shown that polycarbonates allow for higher lithium and sodium transference relative to analogous poly(ethylene oxide) electrolytes. In this work, we compare magnesium polycarbonate electrolytes with poly(ethylene oxide) electrolytes. We will report on anion and polar functional group coordination as investigated through Raman and IR spectroscopy and ion transport as investigated with dielectric/impedance spectroscopy and electrochemical techniques.

Polycarbonate-based electrolytes for magnesium batteries

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.