Nonaqueous electrolyte secondary battery
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United States of America Patent
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Jan 10, 2017
Grant Date -
Dec 26, 2013
app pub date -
Aug 23, 2013
filing date -
Feb 23, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, there is provided a nonaqueous electrolyte secondary battery. A negative electrode current collector comprises a coated portion on which the negative electrode active material layer is provided and a noncoated portion which is adjacent to the coated portion, in which the negative electrode active material layer is not present. A density of the negative electrode active material layer is within a range of 2.1 g/cc to 2.4 g/cc. A ratio W1/W2 of a mass of the coated portion per unit area (W1) to a mass of the noncoated portion per unit area (W2) is from 0.997 to 1.
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