THE IMPACT OF HYDROLYSIS PRODUCTS AND POSITIVE ELECTRODE BINDERS ON SAFETY OF LITHIUM/SULFUR DIOXIDE.../CARBON RECHARGEABLE CELLS

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 9494
Amount: $56,941.00
Phase: Phase I
Program: SBIR
Awards Year: 1989
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Battery Engineering Inc
1636 Hyde Park Ave, Hyde Park, MA, 02136
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr Carl R Schlaikjer
 (617) 361-7555
Business Contact
Phone: () -
Research Institution
N/A
Abstract
OUR OBJECTIVE IS TO IMPROVE THE SAFETY OF LITHIUM/SULFUR DIOXIDE (TETRACHLOROALUMINATE) RECHARGEABLE CELLS. RECENT WORK AT OUR LABORATORY SHOWED THAT SULFUR DIOXIDE SOLUTIONS OF TETRACHLOROALUMINATE SALTS CONTAIN HYDROLYSIS PRODUCTS WHICH ARE DIFFICULT TO ELIMINATE, EVEN IF THE ALUMINUM CHLORIDE USED HAS FIRST BEEN CAREFULLY PURIFIED. WE HAVE SUSPECTED THAT HYDROLYSIS PRODUCTS CONTRIBUTE TO THE INSTABILITY OF CELLS DURING CHARGING, AND PROPOSE THREE METHODS TO ELIMINATE PROTON-CONTAINING IMPURITIES. WE ALSO PROPOSE TO INVESTIGATE WHETHER REPLACING THE TEFLON BINDER IN THE POSITIVE ELECTRODE WITH AN ACID RESISTANT ELASTOMER THAT WILL NOT REACT AS VIOLENTLY WITH LITHIUM MIGHT REDUCE THE INCIDENCE OF RUNAWAY REACTIONS DURING CHARGING. THE TEST VEHICLE IS TO BE A HERMETICALLY SEALED AA SIZE CELL PREVIOUSLY ENGINEERED FOR USE IN THE STUDY OF LITHIUM RECHARGEABLE SYSTEMS.

* information listed above is at the time of submission.

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