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Mesoporous nanocrystalline film architecture for capacitive storage devices

United States Patent

May 16, 2017
View the Complete Patent at the US Patent & Trademark Office
A mesoporous, nanocrystalline, metal oxide construct particularly suited for capacitive energy storage that has an architecture with short diffusion path lengths and large surface areas and a method for production are provided. Energy density is substantially increased without compromising the capacitive charge storage kinetics and electrode demonstrates long term cycling stability. Charge storage devices with electrodes using the construct can use three different charge storage mechanisms immersed in an electrolyte: (1) cations can be stored in a thin double layer at the electrode/electrolyte interface (non-faradaic mechanism); (2) cations can interact with the bulk of an electroactive material which then undergoes a redox reaction or phase change, as in conventional batteries (faradaic mechanism); or (3) cations can electrochemically adsorb onto the surface of a material through charge transfer processes (faradaic mechanism).
Dunn; Bruce S. (Los Angeles, CA), Tolbert; Sarah H. (Encino, CA), Wang; John (Glendora, CA), Brezesinski; Torsten (Pohlhein, DE), Gruner; George (Los Angles, CA)
14/ 173,490
February 5, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under N00014-04-1-0410, N00014-05-1-0058 and N00014-08-1-0103 awarded by the Navy, CHE-0527015 awarded by the National Science Foundation, and DE-SC0001342 awarded by the Department of Energy. The Government has certain rights in the invention.