Nonaqueous electrolyte solution and lithium ion battery
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United States of America Patent
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Feb 24, 2015
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Mar 20, 2014
app pub date -
May 8, 2012
filing date -
May 9, 2011
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Abstract
A nonaqueous electrolyte and a lithium ion battery with reduced temporal variations in battery characteristics from initial values are provided. A mixed solution is prepared by dissolving a lithium salt such as LiPF6 in a nonaqueous solvent such as ethylene carbonate. Allylboronate ester and siloxane are mixed with the mixed solution. The content of the allylboronate ester is 1 wt % or less. The content of the siloxane is 2 wt % or less. 2-Allyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is used as the allylboronate ester. At least one kind selected from hexamethyldisiloxane and 1,3-divinyltetramethyldisiloxane is used as the siloxane.
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