INVESTIGATION OF POROUS LITHIUM BATTERY ELECTRODES.
Abstract
The objective of this program is to investigate methods for producing highly porous lithium electrodes for use in rechargeable spacecraft batteries. This report describes theoretical considerations for, and experimental measurements of, electrochemical parameters for the purpose of correlating electrode performance with true electrochemical areas of electrodes. Among such parameters are: (1) direct charging capacitance, (2), potentiostatic pulse oxidation, and (3) exchange current measurements. Smooth planar surfaces and porous electroformed screen surfaces are to be considered. First results with area measurements have shown that double layer capacitance data in propylene carbonate electrolyte should be useful for estimating true surface areas of inert porous electrode supports. Research is being continued to establish, if possible, a method for measurement of the true surface area of lithium in an inert support. Other work used smooth foils as electrode supports in cell-like construction. Results showed efficiency of utilization of electrodeposited lithium up to 31 percent. Such efficiency was measured during cycling at about 5 ma/sq cm and at a nominal 125-minute rate. At this rate, the calculated thickness of lithium coatings on the 0.5-mil foil support would be about 2 mils.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1966
- Accession Number
- AD0487623
Entities
People
- C. L. Faust
- D. E. Semones
- E. A. Roeger Jr.
- J. Mccallum
Organizations
- Battelle Memorial Institute