CPC H01M 10/0567 (2013.01) [H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 10/4235 (2013.01); H01M 2300/0025 (2013.01)] | 14 Claims |
1. A non-aqueous electrolyte secondary battery, comprising:
a positive electrode capable of the absorbing and releasing of a lithium ion;
a negative electrode capable of the absorbing and releasing of the lithium ion; and
a non-aqueous electrolyte solution containing a non-aqueous solvent and an electrolyte dissolved in the non-aqueous solvent, wherein
the negative electrode comprises a carbonaceous material,
the non-aqueous electrolyte solution further comprises, in addition to the electrolyte and the non-aqueous solvent:
(A) a compound having at least two isocyanate groups per molecule; and
(B) a monofluorophosphate salt or a difluorophosphate salt, at from 0.001 mass % or more to 5 mass % or less in the non-aqueous electrolyte solution, and
a weight ratio between the compound having at least two isocyanate groups per molecule and the monofluorophosphate salt or the difluorophosphate salt is in the range from 1:500 to 300:1.
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