LITHIUM ANODE LIMITED CYCLE BATTERY INVESTIGATION.
Quarterly technical progress rept. no. 7,
LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB
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The purpose of this experimental program is to develop the technology of the lithium-cupric fluoride system and construct and test batteries based on this system. During this work period, primary emphasis was on the optimization of electrodes that could be used in 25 A-hr and larger batteries. Cathodes prepared by the hydrofluorination of basic carbonate have showed promise. Copper powder is incorporated in these electrodes to obtain conductivity, or copper acetate, which is reduced to copper in the processing, is added to the mixture. Mechanical strength in electrodes made to date has been poor, resulting in cell tests with poor reproducibility. Discharge of a cell at low rate showed an ampere-hour capacity equivalent to the theoretical capacity of the cathode but the voltage during discharge was without a plateau and the voltage gradually approached zero. No other reaction than the reduction of copper fluoride has been proposed to explain this which agrees with the test conditions. Similarly, 25 A-hr cells discharged at a series of decreasing rates delivered 70 to 75 W-hrlb to a 2.0-V endpoint. This was equivalent to 300 W-hrlb of active material in the cell.
- Electrochemical Energy Storage