Electrolyte solution and lithium ion battery using said electrolyte solution
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United States of America Patent
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Mar 21, 2017
Grant Date -
Jun 23, 2016
app pub date -
Aug 12, 2015
filing date -
Dec 17, 2014
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Abstract
An electrolyte solution for a lithium-ion battery and a lithium-ion battery using the electrolyte solution are provided. The electrolyte solution includes organic solvents, an electrolyte lithium salt, and additives. The additives include succinonitrile, fluorobenzene, and lithium tetrafluoroborate. The percentage by mass of the fluorobenzene in the electrolyte solution is 0.1%-15%. The percentage by mass of the succinonitrile in the electrolyte solution is 0.1%-10%. The percentage by mass of the lithium tetrafluoroborate in the electrolyte solution is 0.01%-1%. The electrolyte solution may increase the charging voltage upper limit and improve the high-temperature intermittent cyclability of the lithium-ion battery. At the same time, the electrolyte may lower the battery swelling rate, reduce the internal resistance, and improve the stability and safety of the lithium-ion battery.
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