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Title: Mesoporous nanocrystalline film architecture for capacitive storage devices

Abstract

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).

Inventors:
; ; ; ;
Publication Date:
Research Org.:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1357480
Patent Number(s):
9,653,219
Application Number:
14/173,490
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA CHO
DOE Contract Number:
SC0001342
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Feb 05
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE

Citation Formats

Dunn, Bruce S., Tolbert, Sarah H., Wang, John, Brezesinski, Torsten, and Gruner, George. Mesoporous nanocrystalline film architecture for capacitive storage devices. United States: N. p., 2017. Web.
Dunn, Bruce S., Tolbert, Sarah H., Wang, John, Brezesinski, Torsten, & Gruner, George. Mesoporous nanocrystalline film architecture for capacitive storage devices. United States.
Dunn, Bruce S., Tolbert, Sarah H., Wang, John, Brezesinski, Torsten, and Gruner, George. Tue . "Mesoporous nanocrystalline film architecture for capacitive storage devices". United States. doi:. https://www.osti.gov/servlets/purl/1357480.
@article{osti_1357480,
title = {Mesoporous nanocrystalline film architecture for capacitive storage devices},
author = {Dunn, Bruce S. and Tolbert, Sarah H. and Wang, John and Brezesinski, Torsten and Gruner, George},
abstractNote = {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).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2017},
month = {Tue May 16 00:00:00 EDT 2017}
}

Patent:

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  • Preferred embodiments of a freestanding, heat resistant microporous polymer film (10) constructed for use in an energy storage device (70, 100) implements one or more of the following approaches to exhibit excellent high temperature mechanical and dimensional stability: incorporation into a porous polyolefin film of sufficiently high loading levels of inorganic or ceramic filler material (16) to maintain porosity (18) and achieve low thermal shrinkage; use of crosslinkable polyethylene to contribute to crosslinking the polymer matrix (14) in a highly inorganic material-filled polyolefin film; and heat treating or annealing of biaxially oriented, highly inorganic material-filled polyolefin film above the meltingmore » point temperature of the polymer matrix to reduce residual stress while maintaining high porosity. The freestanding, heat resistant microporous polymer film embodiments exhibit extremely low resistance, as evidenced by MacMullin numbers of less than 4.5.« less
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