Patent ID: 8372541

Claim:
A non-aqueous electrolyte secondary battery comprising: a positive electrode comprising lithium-iron phosphate; and a negative electrode comprising a lithium-titanium composite oxide, wherein the lithium-titanium composite oxide is Li 4 Ti 5 O 12 , and a lithium composite oxide which is different from the lithium-titanium composite oxide, the lithium composite oxide having a potential of 2.5 to 3V vs. Li/Li + at a lithium absorption/desorption and a spinel-type crystal structure; wherein the lithium composite oxide is represented by the general formula Li 1+p (Mn 1−x M x ) 2 O 4 where M is at least one metal selected from the group consisting of Ti, Li, Al, Ni, Cr and Mg, and x and p satisfy the following equation 0<x≦0.5 and 0≦p≦1.