Nonaqueous electrolyte secondary battery and fabrication method thereof

摘要

A nonaqueous electrolyte secondary battery including a positive electrode containing a positive active material, a negative electrode containing a negative active material and a nonaqueous electrolyte. The secondary battery contains, as the negative active material, a lithium-containing molybdenum oxide represented by a chemical formula Li_xMoO₂ (0.05<=x<=0.25) when in a fully discharged state. The lithium-containing molybdenum oxide can be obtained by allowing lithium to react to molybdenum dioxide (MoO₂) electrochemically, for example.