Nonaqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery, comprising an electrode assembly including a plurality of first electrodes and a plurality of second electrodes alternately laminated with a separator interposed therebetween, wherein

• the separator includes a porous resin base material and a porous heat-resistant layer, the porous heat-resistant layer being formed on one side of the resin base material and having larger surface irregularities than surface irregularities of the resin base material,
• the electrode assembly has:
• first adhesive particles bonding the first electrodes to the heat resistant layer;
• and
• second adhesive particles bonding the second electrodes to the resin base material,
• a mass of the first adhesive particles per unit area at a first interface between the first electrodes and the heat resistant layer is larger than a mass of the second adhesive particles per unit area at a second interface between the second electrodes and the resin base material,
• wherein (A) the number of the first adhesive particles per unit area at the first interface is larger than (B) the number of the second adhesive particles per unit area at the second interface,
• wherein a ratio of the number of particles (AB) between the number of first adhesive particles (A) and the number of the second adhesive particles (B) is 1.01 to 2.5, and wherein an average particle diameter of the first adhesive particles is smaller than a concave part present on the surface of the heat resistant layer, and an average particle diameter of the second adhesive particles is larger than a concave part present on the surface of the resin base material.