Characterization of the Li(Si)/CoS(2) couple for a high-voltage, high-power thermal battery Page: 4 of 36
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SAND2000-0396
Unlimited Release
Printed February 2000
Characterization of the Li(Si)/CoS2 Couple for a
High-Voltage, High-Power Thermal Battery
Ronald A. Guidotti and Frederick W. Reinhardt
Power Sources Engineering and Development Department
Sandia National Laboratories
P.O. Box 5800
Albuquerque, NM 87185-0614
Abstract
In order to determined the capabilities of a thermal battery with high-voltage and high-power
requirements, a detailed characterization of the candidate LiSi/LiCl-LiBr-LiF/CoS2
electrochemical couple was conducted. The rate capability of this system was investigated
using 0.75"- and 1.25"-dia. single and multiple cells under isothermal conditions, where the
cells were regularly pulsed at increasingly higher currents. Limitations of the electronic loads
and power supplies necessitated using batteries to obtain the desired maximum current
densities possible for this system. Both 1.25"- and 3"-dia. stacks were used with the number of
cells ranging from 5 to 20. Initial tests involved 1.25"-dia. cells, where current densities in
excess of 15 A/cm2 (>200 W/cm2) were attained with 20-cell batteries during 1-s pulses. In
subsequent follow-up tests with 3"-dia., 10-cell batteries, ten 400-A, 1-s pulses were delivered
over an operating period of ten minutes. These tests formed the foundation for subsequent full-
sized battery tests with 125 cells with this chemistry.- -.-.------ ..-~'nr* -- V - - .--- ,-- -~ --
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GUIDOTTI,RONALD A. & REINHARDT,FREDERICK W. Characterization of the Li(Si)/CoS(2) couple for a high-voltage, high-power thermal battery, report, February 1, 2000; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc704794/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.