Positive electrode and nonaqueous electrolyte secondary battery using same

The invention relates to a positive electrode and a nonaqueous electrolyte secondary battery using the same. Provided is a positive electrode capable of achieving high capacity and high output in a non-aqueous electrolyte secondary battery. A positive electrode disclosed herein includes a positive electrode current collector and a positive electrode active material layer supported by the positive electrode current collector. The positive electrode active material layer contains, as a positive electrode active material, particles of a lithium composite oxide having a layered structure. The porosity of the positive electrode active material layer is 17%-20%. The peak pore diameter in the pore distribution of the positive electrode active material layer as measured by mercury intrusion method is 0.400 [mu] m to 0.550 [mu] m. 本发明涉及正极及使用了其的非水电解质二次电池。提供能够实现非水电解质二次电池的高容量化和高输出化的正极。在此公开的正极具备正极集电体和支承于所述正极集电体的正极活性物质层。上述正极活性物质层含有具有层状结构的锂复合氧化物的粒子作为正极活性物质。所述正极活性物质层的空隙率为17％～20％。采用水银压入法测定的所述正极活性物质层的细孔分布中的峰值细孔径为0.400μm～0.550μ