The performance of electrochemical energy storage devices relies largely on a scrupulous design of nanoarchitectures and smart hybridization of active materials. Nanoarray electrodes are particularly interesting as the power source in microelectronic devices, which require high rates, high areal capacity/capacitance and long cycle stability. When the metal-ion battery electrode materials are designed into nanostructures (e.g., 1D array, 2D nanosheets), the pseudocapacitive effect become dominating and can boost the high-rate performance.<br/>Our group has been actively working on nanoarray materials directly on conductive substrates as electrodes for metal-ion storage. In this talk, I will articulate our material design strategies and mechanisms of extrinsic pseudocapacitance effect which contribute to the high-rate performance. This effect applies to intercalation, conversion, as well as alloy type electrodes. These materials include vanadium oxides and layered semiconductors. Full hybrid batteries (or called metal-ion capacitors) will also be presented based on such subtle designed electrodes.

Nanoarray electrodes for high-rate rechargeable Na and Zn ion batteries

256th National Meeting (2018)

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