Lithium-ion batteries transformed our world through enabling mobile communication devices. Further enabling a clean mobile world through the electrification of vehicles is expected to require a next-generation energy storage technology with lower cost, higher energy storage density, and improved safety. Nonaqueous multivalent (MV) ion intercalation energy storage systems are a realistic candidate to provide these requirements. The benefit of high volumetric energy densities of these systems is realized by utilization of metallic anodes and high voltage, high capacity, high mobility cathodes. A series of significant challenges, however, must be overcome before the introduction of commercially viable MV batteries. Two particular challenges will be addressed in this presentation: developing stable host-lattices that enable solid-state mobility and high insertion potential of the MV cations, namely Mg. Computational modeling and design of materials was used to identify design principles and demonstrated a pathway to achieving materials meeting these requirements. The electrochemical, structural, and spectroscopic analyses will be discussed as prbes for reversible changes in the MV content and oxidation state changes of redox active species in a series of cathodes. Evidence will be provided indicating that effective solid-state mobility of MV cations is available along with limitations in current progress; thereby, encouraging further research into this rapidly expanding field of study.

Pathway to high energy density multivalent battery cathodes

255th National Meeting (2018)

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