AN ENERGY-DENSE HIGH-RATE POWER SUPPLY FOR ROBOTS

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$49,583.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
5768
Agency Tracking Number:
5768
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
20 Assembly Square Dr, Somerville, MA, 02145
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
DR FRASER WALSH
(617) 776-6610
Business Contact:
() -
Research Institute:
n/a
Abstract
THE PROPOSED PROGRAM RELATES TO THE IDENTIFICATION OF A MIXED SOLVENT ELECTROLYTE CAPABLE OF EXTENDING THE POWER DENSITY, CYCLE LIFE AND USEFUL TEMPERATURE RANGE OF A LITHIUM SECONDARY BATTERY. CELLS WITH ELECTROLYTES CONTAINING A MIXTURE OF A CYCLIC ETHER AND AN ALKYL UREA WILL BE TESTED. THE MIXTURE HAS BEEN CHOSEN FOR EVALUATION BECAUSE INITIAL NMR DATA SHOWED THESE TWO SOLVENT TYPES TO HAVE CONSIDERABLE ELECTRON CLOUD OVER-LAP WHEN MIXED IN THE PROPER PROPORTIONS. SUCH OVER-LAP PROVIDES FOR HIGHER CHEMICAL STABILITY AND SOLUTE SOLVATION POWER. SUCCESSFUL COMPLETION OF THE PROGRAM WILL RESULT IN THE IDENTIFICATION OF A MIXED SOLVENT ELECTROLYTE WHICH PROVIDE AT LEAST 2 MA/CM 2 PERFORMANCE OVER A BROAD TEMPERATURE RANGE (-40 DEG TO +71 DEG C) OF A LITHIUM SECONDARY CELL) THE MIXTURE WILL ALSO SUPPORT EXTENDED CELL CYCLING ON STORAGE. THE PROGRAM APPROACH IS TO CARRY OUT CELL CYCLE TESTS OVER A BROAD TEMPERATURE RANGE. ELECTROLYTE DEGRADATION WILL BE FOLLOWED BY GC AND NMR; ANODE SURFACE CHARACTERISTICS WILL BE DETERMINED BY A TECHNIQUE BASED ON THE MEASUREMENT OF GAL VANOSTATIC TRANSIENTS. THE OPTIMIZED ELECTROLYTE MIXTURE WILL BE TESTED IN MULTIELECTRODE SEALED CELLS.

* information listed above is at the time of submission.

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