Improved Performance of Lithium-ion Cells at Low Temperature

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-05ER86251
Agency Tracking Number: 79469B05-I
Amount: $750,000.00
Phase: Phase II
Program: STTR
Awards Year: 2006
Solitcitation Year: 2005
Solitcitation Topic Code: 17
Solitcitation Number: DOE/SC-0075
Small Business Information
MER Corporation (Materials and Electrochemical Research)
7960 South Kolb Road, Tucson, AZ, 85706
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Sohrab Hossain
 Dr.
 (520) 574-1980
 shossain@mercorp.com
Business Contact
 Raouf Loutfy
Title: Dr.
Phone: (520) 574-1980
Email: rloutfy@mercorp.com
Research Institution
 Brookhaven National Laboratory
 Margaret Bogosain
 Technology Transfer Office
Upton, NY, 11973
 (631) 344-3663
 Federally funded R&D center (FFRDC)
Abstract
The widespread uses of hybrid electric vehicles (HEVs) and electric vehicles (EVs), which use rechargeable batteries as the power source, could significantly reduce U.S. dependence on foreign oil. Lithium-ion batteries have great potential for such applications but need improvement in low temperature performance. Therefore, this project will develop technology to improve this low temperature performance by incorporating anion receptor additives in the battery electrolytes. These additives should be highly effective in dissociating ion-pairs and forming complexes with the electrolyte anions, thereby improving ionic conductivity and interfacial impedance. In Phase I, several different types of electrolytes were prepared and their ionic conductivity and electrode/electrolyte interfacial impedance were measured at different low temperatures. Prototype 200 mAh lithium-ion cells were developed with these electrolytes, and their performance was evaluated at both ambient temperatures and low temperatures. Phase II will: (1) prepare electrolytes with different combinations of salts, solvents, and anion-receptor additives, (2) optimize salts, solvents, and additive combinations, (3) characterize the developed electrolytes, (4) evaluate the electrolytes for lithium-ion battery applications, and (5) develop prototype lithium-ion cells and evaluate their performance. Commercial Applications and other Benefits as described by the awardee: The technology should lead to the development of a highly effective, low-temperature-performance electrolyte for lithium-ion batteries.

* information listed above is at the time of submission.

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