Freestanding, heat resistant microporous film for use in energy storage devices
Abstract
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 melting 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.
- Inventors:
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1422800
- Patent Number(s):
- 9896555
- Application Number:
- 13/255,868
- Assignee:
- Amtek Research International LLC (Lebanon, OR)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- DOE Contract Number:
- FC26-05NT42403
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2010 Mar 19
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
Pekala, Richard W., Cherukupalli, Srinivas, and Waterhouse, Robert R. Freestanding, heat resistant microporous film for use in energy storage devices. United States: N. p., 2018.
Web.
Pekala, Richard W., Cherukupalli, Srinivas, & Waterhouse, Robert R. Freestanding, heat resistant microporous film for use in energy storage devices. United States.
Pekala, Richard W., Cherukupalli, Srinivas, and Waterhouse, Robert R. Tue .
"Freestanding, heat resistant microporous film for use in energy storage devices". United States. https://www.osti.gov/servlets/purl/1422800.
@article{osti_1422800,
title = {Freestanding, heat resistant microporous film for use in energy storage devices},
author = {Pekala, Richard W. and Cherukupalli, Srinivas and Waterhouse, Robert R.},
abstractNote = {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 melting 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 20 00:00:00 EST 2018},
month = {Tue Feb 20 00:00:00 EST 2018}
}
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