Through mesoscale design, high energy density anodes (Si, NiSn, and various conversion oxides), and high energy density cathodes (primarily conversion compounds) with optimized mechanics, electron transport, and ion transport were fabricated. At the most fundamental level, mesostructuring enables optimization of the trade-off between energy and power density in energy storage systems due to unavoidable ohmic and other losses that occur during charge or discharge. Mesostructuring also enables minimization of the stresses imposed by cycling. We have found a particularly effective way to provide these pathways is to use a sacrificial template to form a mesostructured 3D current collector, which is then subsequently coated with the electrolytically active material. Using this approach, both high power and high energy Li-based batteries were formed.

Strain optimized 3D mesostructured battery electrodes

249th National Meeting (2015)

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