Accession Number:

AD0601128

Title:

LIMITED-CYCLE SECONDARY BATTERY USING LITHIUM ANODE

Descriptive Note:

Final rept.

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA

Personal Author(s):

Report Date:

1964-05-01

Pagination or Media Count:

43.0

Abstract:

The lithium-cupric fluoride and lithium-cobaltic fluoride electrochemical systems were investigated with eventual battery development as the goal. Specific conductivities of .0134Omegacm and .0068Omegacm were experimentally determined for solutions of sodium hexafluorophosphate in butyrolactone and propylene carbonate. Cells with reference electrodes showed lithium anode polarization of 70 mv during a 100-hr discharge at 1 masq. in NaPF6-propylene carbonate and 150 mv under similar conditions with NaPF6- butyrolactone electrolyte. Approximately 90-percent utilization of lithium was achieved in these tests. Cupric fluoride cathodes were prepared from cupric fluoride-silver flake blends. Utilization of 72 percent was achieved for cupric fluoride to 1.5-v polarization, which is approximately equivalent to a 2.0-v cell endpoint. Values of 128 w-hrlb of electrodes or 24 w-hrlb of electrodes and electrolyte actually used were obtained during these tests. Aluminum-cased cells discharged with a profiled load rate had lower weight-to-energy figures than the previous test cells. Figures of 4 to 15 w-hrlb of electrode and electrolyte were obtained at 1.2 to 0.6 masq. in. current density to a 2.0-v endpoint.

Subject Categories:

  • Physical Chemistry
  • Electrochemical Energy Storage
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE