Non-aqueous electrolyte secondary battery

A non-aqueous non-electrolyte secondary battery comprising:

• a positive electrode;
• a negative electrode;
• and
• a separator interposed between the positive electrode and the negative electrode, wherein
• the separator comprises:
• a porous base member;
• a first filler layer which contains phosphate particles as a primary component, and which is placed on a side of one surface of the base member;
• and
• a second filler layer which contains one or more compounds selected from the group consisting of an aromatic polyamide, an aromatic polyimide, and an aromatic polyamideimide, and which is placed between the base member and the first filler layer or on a side of the first filler layer opposite from the side of the base member,
• a BET specific surface area of the phosphate particles is greater than or equal to 5 m2/g and less than or equal to 100 m2/g, and
• a content of the compound in the second filler layer is greater than or equal to 15 mass %.