Lithium ion secondary battery
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United States of America Patent
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Sep 15, 2020
Grant Date -
Jan 5, 2017
app pub date -
Jun 2, 2016
filing date -
Jun 30, 2015
priority date (Note) -
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Abstract
Provided is a lithium ion secondary battery including: a positive electrode; a negative electrode; a separator; and an electrolyte solution, the electrolyte solution including an additive A containing sulfur, and at least one of a cyclic carbonate additive B which is different from the additive A and which has an unsaturated bond and a cyclic carbonate additive C which is different from the additives A and B and which has a halogen. A molar ratio of the additive A relative to a total molar amount of the additive A, the additive B, and the additive C is smaller than a total of a molar ratio of the additive B and a molar ratio of the additive C relative to the total molar amount.
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