| 摘要 |
A nonaqueous electrolyte secondary battery includes a nonaqueous electrolyte and a positive electrode including an active material containing lithium composite oxide powder, the lithium composite oxide powder includes secondary particles, exhibits a peak intensity ratio satisfying the following formula (4), satisfies the following formula (5), and has a particle distribution wherein a particle diameter at a volumetric cumulative frequency of 90% (D90) falls within the range of 10 to 25 m, and the nonaqueous electrolyte contains a sultone compound including a ring having at least one double bond; <?in-line-formulae description="In-line Formulae" end="lead"?>2<=(I<SUB>003</SUB>/I<SUB>104</SUB>)<5 (4)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>0.95<=(X<SUB>Li</SUB>/X<SUB>M</SUB>)<=1.02. (5)<?in-line-formulae description="In-line Formulae" end="tail"?>
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