ELECTROLYTE COMPOSITIONS FOR LITHIUM-ION BATTERY CELLS WITH ANODES COMPRISING A BLEND OF SILICON-CARBON COMPOSITE PARTICLES AND GRAPHITE PARTICLES

ELECTROLYTE COMPOSITIONS FOR LITHIUM-ION BATTERY CELLS WITH ANODES COMPRISING A BLEND OF SILICON-CARBON COMPOSITE PARTICLES AND GRAPHITE PARTICLES

An electrolyte for a lithium-ion battery includes a primary lithium salt and a solvent composition. In some implementations, the solvent composition includes fluoroethylene carbonate (FEC), at least one linear ester, and at least one branched ester. In some implementations, a mole fraction of the FE...

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Bibliographische Detailangaben
Hauptverfasser: YUE, Xiujun, TERAN, Natasha, NITTA, Naoki, TURCHENIUK, Kostiantyn, HARRY, Katherine, IABLOKOV, Viacheslav, GENT, William, YUSHIN, Gleb
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:An electrolyte for a lithium-ion battery includes a primary lithium salt and a solvent composition. In some implementations, the solvent composition includes fluoroethylene carbonate (FEC), at least one linear ester, and at least one branched ester. In some implementations, a mole fraction of the FEC in the electrolyte is in a range of about 2 mol. % to about 30 mol. %, a total mole fraction of the at least one linear ester and the at least one branched ester in the electrolyte is at least about 45 mol. %, a molar ratio of the at least one linear ester to the at least one branched esters is in a range of about 1:10 to about 20:1, and the electrolyte is substantially free of four-carbon cyclic carbonates. Lithium-ion batteries employing such electrolytes are also disclosed.