IMPROVEMENT IN THE CAPACITY AND SAFETY OF LITHIUM/INORGANIC ELECTROLYTE SULFUR DIOXIDE RECHARGEABLE CELLS

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$496,000.00
Award Year:
1988
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
5586
Agency Tracking Number:
5586
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1636 Hyde Park Ave, Hyde Park, MA, 02189
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Carl Schlaikjer
(617) 361-7555
Business Contact:
() -
Research Institution:
n/a
Abstract
THE OBJECTIVE IS TO INCREASE THE CAPACITY AND SAFETY OF THE LITHIUM/ LIALCL4.6SO2/CARBON RECHARGEABLE CELL BY ALTERING THE ELECTROLYTE AND THE POSITIVE ELECTRODE, AND BY IMPROVING THE METHODS CURRENTLY EMPLOYED FOR MAKING THE ELECTROLYTE. ALUMINUM IS REMOVED AS DISCHARGE PROCEEDS, SINCE ONE OF THE PRODUCTS IS AN INSOLUBLE COMPLEX BETWEEN THE ALUMINUM, REDUCED SO2, AND THE CARBON SURFACE. THE DILEMMA IS THAT ADDING MORE ALUMINUM AS LIALCL4, WHILE IT MIGHT IMPROVE THE CAPACITY, WOULD ALSO RAISE THE ELECTROLYE FREEZING POINT TO AN UNACCEPTABLE HIGH LEVEL. WE PROPOSE TO CHANGE THE COMPOSITION OF THE ELECTROLYTE SUCH THAT THE LOW FREEZING POINT IS MAINTAINED, YET ADDING SOLUTES WHICH ARE LIKELY TO INCREASE THE CAPACITY. IN ADDITION, INSOLUBLE MATERIALS WHICH COULD BE INSTRUMENTAL IN INCREASING THE CAPACITY BY ENCOURAGING THE FORMATION OF COMPLEXES SIMILAR TO THE ONE WHICH FORMS ON THE KETJENBLACK NOW USED IN THESE CELLS WILL BE ADDED TO THE CARBON POSITIVE ELECTRODE. WE EXPECT IMPROVEMENTS IN SAFETY THROUGH THE ADDITION TO THE ELECTROLYTE OF MATERIALS WHICH WOULD IMPROVE THE MORPHOLOGY OF THE PLATED LITHIUM.

* information listed above is at the time of submission.

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