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Advances in ambient temperature secondary lithium cellsThe Jet Propulsion Laboratory is involved in a Research and Development program sponsored by NASA/OAST on the development of ambient temperature secondary lithium cells for future space applications. Some of the projected applications are planetary spacecraft, planetary rovers, and astronaut equipment. The main objective is to develop secondary lithium cells with greater than 100 Wh/kg specific energy while delivering 1000 cycles at 50 percent Depth of Discharge (DOD). To realize these ambitious goals, the work was initially focused on several important basic issues related to the cell chemistry, selection of cathode materials and electrolytes, and component development. The performance potential of Li-TiS2, Li-MoS3, Li-V6O13 and Li-NbSe3 electrochemical systems was examined. Among these four, the Li-TiS2 system was found to be the most promising system in terms of realizable specific energy and cycle life. Some of the major advancements made so far in the development of Li-TiS2 cells are in the areas of cathode processing technology, mixed solvent electrolytes, and cell assembly. Methods were developed for the fabrication of large size high performance TiS2 cathodes. Among the various electrolytes examined, 1.5M LiAsF6/EC + 2-MeTHF mixed solvent electrolyte was found to be more stable towards lithium. Experimental cells activated with this electrolyte exhibited more than 300 cycles at 100 percent Depth of Discharge. Work is in progress in other areas such as selection of lithium alloys as candidate anode materials, optimization of cell design, and development of 5 Ah cells. The advances made at the Jet Propulsion Laboratory on the development of secondary lithium cells are summarized.
Document ID
19890013640
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)
Deligiannis, F. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Huang, C-K. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Halpert, G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Publication Information
Publication: NASA, Lewis Research Center, Space Electrochemical Research and Technology Conference: Abstracts
Subject Category
Energy Production And Conversion
Accession Number
89N23011
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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