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Wide Operating Temperature Range Electrolytes for High Voltage and High Specific Energy Li-Ion CellsA number of electrolyte formulations that have been designed to operate over a wide temperature range have been investigated in conjunction with layered-layered metal oxide cathode materials developed at Argonne. In this study, we have evaluated a number of electrolytes in Li-ion cells consisting of Conoco Phillips A12 graphite anodes and Toda HE5050 Li(1.2)Ni(0.15)Co(0.10)Mn(0.55)O2 cathodes. The electrolytes studied consisted of LiPF6 in carbonate-based electrolytes that contain ester co-solvents with various solid electrolyte interphase (SEI) promoting additives, many of which have been demonstrated to perform well in 4V systems. More specifically, we have investigated the performance of a number of methyl butyrate (MB) containing electrolytes (i.e., LiPF6 in ethylene carbonate (EC) + ethyl methyl carbonate (EMC) + MB (20:20:60 v/v %) that contain various additives, including vinylene carbonate, lithium oxalate, and lithium bis(oxalato)borate (LiBOB). When these systems were evaluated at various rates at low temperatures, the methyl butyrate-based electrolytes resulted in improved rate capability compared to cells with all carbonate-based formulations. It was also ascertained that the slow cathode kinetics govern the generally poor rate capability at low temperature in contrast to traditionally used LiNi(0.80)Co(0.15)Al(0.05)O2-based systems, rather than being influenced strongly by the electrolyte type.
Document ID
20150008720
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Smart, M. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hwang, C.
(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)
Soler, J.
(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)
Ratnakumar, B. V.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Amine, K.
(Argonne National Lab. IL, United States)
Date Acquired
May 21, 2015
Publication Date
October 7, 2012
Subject Category
Energy Production And Conversion
Meeting Information
Meeting: Pacific Rim Meeting on Electrochemical and Solid-State Science PRiME 2012
Location: Honolulu, HI
Country: United States
Start Date: October 7, 2012
End Date: October 12, 2012
Sponsors: Electrochemical Society, Inc.
Funding Number(s)
CONTRACT_GRANT: DE-AC02-05CH11231 sub. 6879235
Distribution Limits
Public
Copyright
Other
Keywords
Li-ion Battery

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