Nonaqueous electrolyte secondary battery and battery pack

A battery pack comprising a nonaqueous electrolyte secondary battery which includes:

• an exterior member;
• a cathode including a cathode active material layer housed in the exterior member;
• an anode including an anode active material layer housed in the exterior member and spatially separated from the cathode by a separator;
• and
• a nonaqueous electrolyte filled in the exterior member,
• wherein the cathode active material layer contains lithium-copper oxide and copper oxide, and
• a peak intensity ratio d(002)/d(010) between a plane index d(010) derived from the lithium-copper oxide and a plane index d(002) derived from the copper oxide is not lower than 0.1 and not higher than 0.5 at an X-ray diffraction peak.

A nonaqueous electrolyte secondary battery comprising:

• an exterior member;
• a cathode including a cathode active material layer housed in the exterior member;
• an anode including an anode active material layer housed in the exterior member and spatially separated from the cathode by a separator;
• and
• a nonaqueous electrolyte filled in the exterior member,
• wherein at least one material selected from copper, copper oxide, and copper composite oxide exists in 5 to 95% of a surface area of the anode active material layer on the anode active material layer.