This poster represents some of the presenter's Ph.D. and postdoctoral experiences regarding structure / function relationships among heterogeneous manganese oxides, homogeneous analogs, and their respective electrochemistries in two energy storage applications: 1) activity for catalytic oxidation of water and 2) capacity to reduce while intercalating Li+. For the former, the coordination geometry and oxidation state of the most likely catalytic manganese sites are proposed, as the result of a survey of ten manganese oxide polymorphs in two testing assays. For the latter, the relative roles of inter-particle vs. intra-particle electric conductivity of composite α-MnO2 electrodes are probed through the chemical binding Ag+ both within crystals and on the surface of crystals. One critical assertion is that discrete molecular manganese model compounds can provide insights for the electrochemistry observed on the material level.

Molecular to mesoscale: Identifying atomic-level structural features of nanocrystalline manganese oxides critical to understanding electrochemistry

254th National Meeting (2017)

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