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Li-Ion Electrolytes with Improved Safety and Tolerance to High-Voltage SystemsGiven that lithium-ion (Li-ion) technology is the most viable rechargeable energy storage device for near-term applications, effort has been devoted to improving the safety characteristics of this system. Therefore, extensive effort has been devoted to developing nonflammable electrolytes to reduce the flammability of the cells/battery. A number of promising electrolytes have been developed incorporating flame-retardant additives, and have been shown to have good performance in a number of systems. However, these electrolyte formulations did not perform well when utilizing carbonaceous anodes with the high-voltage materials. Thus, further development was required to improve the compatibility. A number of Li-ion battery electrolyte formulations containing a flame-retardant additive [i.e., triphenyl phosphate (TPP)] were developed and demonstrated in high-voltage systems. These electrolytes include: (1) formulations that incorporate varying concentrations of the flame-retardant additive (from 5 to 15%), (2) the use of mono-fluoroethylene carbonate (FEC) as a co-solvent, and (3) the use of LiBOB as an electrolyte additive intended to improve the compatibility with high-voltage systems. Thus, improved safety has been provided without loss of performance in the high-voltage, high-energy system.
Document ID
20130012674
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other - NASA Tech Brief
External Source(s)
http://www.techbriefs.com/component/content/article/16126
Authors
Smart, Marshall C. (California Inst. of Tech. Pasadena, CA, United States)
Bugga, Ratnakumar V. (California Inst. of Tech. Pasadena, CA, United States)
Prakash, Surya (University of Southern California CA, United States)
Krause, Frederick C. (University of Southern California CA, United States)
Date Acquired
August 27, 2013
Publication Date
April 1, 2013
Publication Information
Publication: NASA Tech Briefs, April 2013
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
NPO-47980
Distribution Limits
Public
Copyright
Public Use Permitted.

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IDRelationTitle20130012640Collected WorksNASA Tech Briefs, April 2013
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