Improved Performance of Lithium-ion Cells at Low Temperature

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$750,000.00
Award Year:
2006
Program:
STTR
Phase:
Phase II
Contract:
DE-FG02-05ER86251
Award Id:
72304
Agency Tracking Number:
79469B05-I
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
7960 South Kolb Road, Tucson, AZ, 85706
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
SohrabHossain
Dr.
(520) 574-1980
shossain@mercorp.com
Business Contact:
RaoufLoutfy
Dr.
(520) 574-1980
rloutfy@mercorp.com
Research Institute:
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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