| 摘要 |
The nonaqueous electrolyte secondary battery according to one aspect of the present invention includes a lithium-transition metal compound as a positive electrode active material that is capable of intercalating and deintercalating a lithium ion and is represented by Li<SUB>1+a</SUB>Ni<SUB>x</SUB>CO<SUB>y</SUB>M<SUB>z</SUB>O<SUB>2 </SUB>(wherein M is at least one element selected from Mn, Al, Ti, Zr, Nb, B, Mg and Mo; and 0<=a<=0.3, 0.1<=x<=1, 0<=y<=0.5, 0<=z<=0.9, a+x+y+z=1), and carbon as a negative electrode active material that is capable of intercalating and deintercalating a lithium ion and is added with a powder of a compound having an imide bond. In the nonaqueous electrolyte secondary battery of the present invention, by incorporating a compound having an imide bond, the initial efficiency of the negative electrode is lowered, so that at a low state of charge of 20% or less, an increasing rate of the IV resistance value becomes small. With such a constitution, a nonaqueous electrolyte secondary battery in which a change in the IV resistance value at a low state of charge is suppressed, which is excellent in output properties and regeneration properties, and which is suitable for an electric vehicle (EV) and a hybrid electric vehicle (HEV), for example, can be provided.
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