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Development of ambient temperature secondary lithium cellsJPL is developing ambient temperature secondary lithium cells for future spacecraft applications. Prior studies on experimental laboratory type Li-TiS2 cells yielded promising results in terms of cycle life and rate capability. To further assess the performance of this cell, 5 Ah engineering model cells were developed. Initially baseline cells were designed and fabricated. Each cell had 15 cathodes and 16 anodes and the ratio of anode to cathode capacity is 6:1. A solution of 1.5 molar LiAsF6 in 2Me-THF was used as the electrolyte. Cells were evaluated for their cycle life at C/1 and C/5 discharge rates and 100 percent depth of discharge. The cells were cycled between voltage limits 1.7 and 2.8 volts. The rate of charge in all cases is C/10. The results obtained indicate that cells can operate at C/10 to C/2 discharge rates and have an initial energy density of 70 Wh/kg. Cells delivered more than 100 cycles at C/2 discharge rate. The details of cell design, the test program, and the results obtained are described.
Document ID
19870020492
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Subbarao, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Shen, D. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dawson, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Deligiannis, F. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Taraszkiewicz, J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Halpert, Gerald (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1987
Publication Information
Publication: NASA-Lewis Research Center, Space Electrochemical Research and Technology (SERT)
Subject Category
Energy Production And Conversion
Accession Number
87N29925
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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