Accession Number : AD0821051

Title :   LITHIUM-ANODE LIMITED CYCLE BATTERY INVESTIGATION.

Descriptive Note : Final rept. 1 Jan 66-1 Jun 67,

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB

Personal Author(s) : Bauman, H. F. ; Chilton, J. E. ; Hultquist, A. E.

Report Date : JUL 1967

Pagination or Media Count : 75

Abstract : This program was concerned with the development of technology required to build batteries based on the lithium-cupric fluoride and lithium-cobaltic fluoride electrochemical couples. All experimental work during this period was with the lithium-cupric fluoride couple with a lithium perchlorate-propylene carbonate electrolyte. The major effort was directed toward increasing the utilization of cupric fluoride in the cathode structure and improving the discharge capabilities of the cathode in laboratory cells and in assembled batteries. A relationship was found between wet stand life, discharge current density, and the water present in the cell system. Cells in which the water content of the components has been reduced discharge with a plateau at about 2.5 V at a current density of 1.5 mA/sq in. Cells in which special techniques were used to remove water from the cathodes, separators, and electrolyte have discharged for 140 hr above the 2.0-V level at a current density of 1.5 mA/sq in. after 130 days of wet stand. Extended low-rate discharge to a 1-V endpoint showed CuF2 utilization of more than 90% for plastic-bagged cells. Aluminum-cased 30-V batteries with 25 A-hr nominal capacity delivered over 50 W-hr/lb to a 22.0-V endpoint. The best cells in this series showed energy densities of over 85 W-hr/lb to a 2.0-V endpoint. Plastic-bagged cells of 1500 A-hr capacity were discharged as 30-V batteries. Discharges were nonuniform.

Descriptors :   *ANODES(ELECTROLYTIC CELL)), (*LITHIUM, (*PRIMARY BATTERIES, MANUFACTURING), (*STORAGE BATTERIES, MANUFACTURING), (*COPPER COMPOUNDS, CATHODES(ELECTROLYTIC CELL)), ENERGY CONVERSION, ELECTROCHEMISTRY, ELECTROLYTES, PROPENES, CARBONATES, LITHIUM COMPOUNDS, PERCHLORATES, INFRARED SPECTROSCOPY, BATTERY SEPARATORS, POLARIZATION, ELECTRIC DISCHARGES, TEMPERATURE, VOLTAGE.

Subject Categories : Electrochemical Energy Storage
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE