Quinary electrolytes for high power lithium ion batteries
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United States of America Patent
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Aug 25, 2020
Grant Date -
Dec 20, 2018
app pub date -
Jan 15, 2016
filing date -
Jan 15, 2016
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Abstract
High power lithium-ion batteries are disclosed. Such batteries may be used, for example, as the sole electric starter motor power sources for automotive vehicles powered by multi-cylinder engines with reciprocating pistons when the vehicles are to be operated in an engine start-stop mode to conserve fuel. Such batteries typically utilize non-aqueous solutions of lithium salts, such as LiPF6 or LiBF4, in combination with durable lithium intercalating electrodes. In accordance with this disclosure the performance of the battery's electrolyte and cells over a wide ambient temperature range is enhanced by a mixture of five miscible solvents formed of lower alkyl moieties. The quinary solvent mixture comprises two cyclic alkyl carbonates, two linear alkyl carbonates, and with a major portion of an alkyl ester.
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