Non-aqueous electrolyte secondary battery and storage circuit using the same

A non-aqueous electrolyte secondary battery comprising:

• a positive electrode having a positive electrode active material layer and a positive electrode current collector;
• a negative electrode having a negative electrode active material layer and a negative electrode current collector;
• a separator interposed between the positive electrode and the negative electrode;
• a non-aqueous electrolyte solution;
• and
• an exterior material enclosing the positive electrode, the negative electrode, the separator and the non-aqueous electrolyte solution, wherein:
• the positive electrode active material layer comprises a lithium transition metal oxide having a layered crystal structure;
• the negative electrode active material layer comprises a lithium titanium oxide having a spinel-type crystal structure, and having a thickness of 25.0 μm or more and 27.8 μm or less;
• a ratio between a thickness of the positive electrode active material layer and the thickness of the negative electrode active material layer is 0.59 ≤(thickness of positive electrode active material layer/thickness of negative electrode active material layer)≤1.14;
• and
• an electric capacity of the positive electrode is higher than an electric capacity of the negative electrode.