| 摘要 |
Provided are a non-aqueous electrolyte secondary battery which has high reliability under environment at high temperature, and has excellent charge-discharge rate characteristics due to lowered resistance, and a storage circuit using the battery. In a non-aqueous electrolyte secondary battery including: a positive electrode with a positive electrode active material layer formed on a positive electrode current collector; a negative electrode with a negative electrode active material layer formed on a negative electrode current collector; a separator provided to be interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte solution, which are enclosed in an exterior material, the positive electrode active material layer includes a lithium transition metal oxide of layered crystal structure; the negative electrode active material layer includes a lithium titanium oxide of spinel-type crystal structure, and is 20.0 µ m or more and 33.4 µ m or less in thickness; and the ratio between the thickness of the positive electrode active material layer and the thickness of the negative electrode active material layer meets the requirement of the following formula (1): 0.59 ‰¤ thickness of positive electrode active material layer / thickness of negative electrode active material layer ‰¤ 1.50 |
