NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Electrolytes for Use in High Energy Lithium-ion Batteries with Wide Operating Temperature RangeMet programmatic milestones for program. Demonstrated improved performance with wide operating temperature electrolytes containing ester co-solvents (i.e., methyl butyrate) containing electrolyte additives in A123 prototype cells: Previously demonstrated excellent low temperature performance, including 11C rates at -30 C and the ability to perform well down to -60 C. Excellent cycle life at room temperature has been displayed, with over 5,000 cycles being demonstrated. Good high temperature cycle life performance has also been achieved. Demonstrated improved performance with methyl propionate-containing electrolytes in large capacity prototype cells: Demonstrated the wide operating temperature range capability in large cells (12 Ah), successfully scaling up technology from 0.25 Ah size cells. Demonstrated improved performance at low temperature and good cycle life at 40 C with methyl propionate-based electrolyte containing increasing FEC content and the use of LiBOB as an additive. Utilized three-electrode cells to investigate the electrochemical characteristics of high voltage systems coupled with wide operating temperature range electrolytes: From Tafel polarization measurements on each electrode, it is evident the NMC-based cathode displays poor lithium kinetics (being the limiting electrode). The MB-based formulations containing LiBOB delivered the best rate capability at low temperature, which is attributed to improved cathode kinetics. Whereas, the use of lithium oxalate as an additive lead to the highest reversible capacity and lower irreversible losses.
Document ID
20140001963
Document Type
Presentation
External Source(s)
Authors
Smart, Marshall C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ratnakumar, B. V. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
West, W. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Whitcanack, L. D. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Huang, C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Soler, J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Krause, F. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
March 17, 2014
Publication Date
May 17, 2012
Subject Category
Energy Production and Conversion
Meeting Information
DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review & Peer Evaluation Meeting(Arlington, VA)
Distribution Limits
Public
Copyright
Other
Keywords
low temperature batteries
lithium-ion batteries
Li-ion battery electrolytes