Abstract: As an emerging energy storage technology, Mg batteries incorporate a metal oxide #cathode (MOC) and metallic anode. They are potential candidates to supersede the state-of-the-art Li-ion battery in energy density, cost, and sustainability. However, complex electrochemical conditions are present that are typically resolved in the case of Li-ion systems. For instance, there are significant discrepancies in reported performances and reactivities of Mg battery MOCs, with detailed analyses revealing that parasitic #electrolytes reactions can contribute almost entirely to the measured capacity. We will discuss the opportunities and challenges associated with Mg (and other multivalent systems), with emphasis on the science of solid-state ion transport. Using a holistic approach encompassing elemental, redox, and structural probes, we will identify and quantify Mg intercalation and solid-state transport in MOCs and what are some of the ongoing #challenges to realizing Mg as a viable technology.

Dr. Brian J. Ingram is currently working as a Scientist in the Department of Chemical Sciences and Engineering, Argonne National Laboratory, USA.

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