Identification of appropriate target materials and deliberate synthesis of the target materials with control of their physiochemical properties are both essential to disentangle the contributions of distinct properties to the functional electrochemistry. This goal demands systematic inquiry using model materials that provide the opportunity for significant synthetic versatility and control. Ideally, a material family that enables direct manipulation of physiochemical characteristics while remaining within the defined structural framework would be necessary. In order to minimize the complicating effects of secondary processing, direct synthetic methods are desirable. <br/> <br/>The structural motif most frequently used for insertion type electrodes is based on layered type structures, where lattice expansion and contraction associated with the ion movement and electron transfer as a result of repeated charge and discharge cycling can result in structural degradation with accompanying loss of capacity. In contrast, tunnel type structures embody a more rigid framework where the inherent structural design may accommodate the presence of multiple cations for reversible ion (de)insertion.  Progress in distinguishing the impact of composition, defects, and crystallite size on electrochemical energy storage processes involving tunnel structured materials will be discussed.

Model cation hosts for energy storage: Using synthetic control to elucidate the impact of composition, defects, and crystallite size for tunnel structured materials

256th National Meeting (2018)

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