Patent ID: 9698400
Date: 2017-07-04
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A non-aqueous electrolyte secondary battery, comprising: an electrode body formed by sequentially stacking a positive electrode, a separator, and a negative electrode; and a non-aqueous electrolyte, wherein the separator has a separator substrate made of resin and a first porous heat resistance layer, the first porous heat resistance layer containing a first inorganic filler and being formed on a surface of the separator substrate on a side facing the positive electrode, a surface of the negative electrode on a side facing the separator is formed by a second porous heat resistance layer containing a second inorganic filler, the first and second porous heat resistance layers satisfy following conditions (1) and (2): a ratio of the average particle diameter of the inorganic filler contained in the second porous heat resistance layer to the average particle diameter of the inorganic filler contained in the first porous heat resistance layer is 0.1 or more and 0.5 or less and a ratio of the second average thickness of the second porous heat resistance layer to the first average thickness of the first porous heat resistance layer is 0.1 or more and 0.5 or less.