Safety shutdown separators
Abstract
The present invention pertains to electrochemical cells which comprise (a) an anode; (b) a cathode; (c) a solid porous separator, such as a polyolefin, xerogel, or inorganic oxide separator; and (d) a nonaqueous electrolyte, wherein the separator comprises a porous membrane having a microporous coating comprising polymer particles which have not coalesced to form a continuous film. This microporous coating on the separator acts as a safety shutdown layer that rapidly increases the internal resistivity and shuts the cell down upon heating to an elevated temperature, such as 110.degree. C. Also provided are methods for increasing the safety of an electrochemical cell by utilizing such separators with a safety shutdown layer.
- Inventors:
- Issue Date:
- Research Org.:
- Optodot Corporation, Woburn, MA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1187931
- Patent Number(s):
- 9070954
- Application Number:
- 11/786,671
- Assignee:
- Optodot Corporation (Woburn, MA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- DOE Contract Number:
- FG02-02ER83542
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2007 Apr 12
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE
Citation Formats
Carlson, Steven Allen, Anakor, Ifenna Kingsley, and Farrell, Greg Robert. Safety shutdown separators. United States: N. p., 2015.
Web.
Carlson, Steven Allen, Anakor, Ifenna Kingsley, & Farrell, Greg Robert. Safety shutdown separators. United States.
Carlson, Steven Allen, Anakor, Ifenna Kingsley, and Farrell, Greg Robert. Tue .
"Safety shutdown separators". United States. https://www.osti.gov/servlets/purl/1187931.
@article{osti_1187931,
title = {Safety shutdown separators},
author = {Carlson, Steven Allen and Anakor, Ifenna Kingsley and Farrell, Greg Robert},
abstractNote = {The present invention pertains to electrochemical cells which comprise (a) an anode; (b) a cathode; (c) a solid porous separator, such as a polyolefin, xerogel, or inorganic oxide separator; and (d) a nonaqueous electrolyte, wherein the separator comprises a porous membrane having a microporous coating comprising polymer particles which have not coalesced to form a continuous film. This microporous coating on the separator acts as a safety shutdown layer that rapidly increases the internal resistivity and shuts the cell down upon heating to an elevated temperature, such as 110.degree. C. Also provided are methods for increasing the safety of an electrochemical cell by utilizing such separators with a safety shutdown layer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {6}
}
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