Nonaqueous electrolyte secondary battery
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United States of America Patent
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Dec 19, 2017
Grant Date -
Feb 25, 2016
app pub date -
Mar 20, 2014
filing date -
Mar 29, 2013
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Abstract
A nonaqueous electrolyte secondary battery comprising a negative electrode plate including a negative electrode collector and a negative electrode mix layer which is placed on the negative electrode collector and which contains a negative electrode active material, a binder A containing a rubber polymer compound as a binder, and a binder B containing a water-soluble polymer compound. The negative electrode mix layer has a cross section in a thickness direction thereof, the cross section being halved into a collector-side region and a surface-side region. The sum of the perimeters of the negative electrode active material per unit area in the cross section is more distributed in the collector-side region than in the surface-side region. The binder A is more distributed in the collector-side region than in the surface-side region.
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