LITHIUM ION SECONDARY BATTERY

摘要

There is provided is a lithium ion secondary battery. The lithium ion secondary battery includes: a positive electrode having a positive electrode active material layer containing a positive electrode active material containing a vanadium-based compound; and a negative electrode having a negative electrode active material layer containing a negative electrode active material into which lithium ions can be inserted/deinserted reversibly. A vanadium-based compound is dispersed in the negative electrode active material layer. As a result, a vanadium-based compound, corresponding to the vanadium-based compound contained in the positive electrode active material is dispersed in the negative electrode active material layer.