Electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery provided with same

An electrode for nonaqueous electrolyte secondary batteries comprising:

• a collector;
• and
• a positive electrode active material layer that is arranged on the collector and contains a positive electrode active material,
• wherein the positive electrode active material comprises lithium transition metal composite oxide particles represented by the following formula (1),
• wherein the particles have:
• a layered structure composed of two or more transition metals,
• an average particle diameter DSEM of 1 to 7 μm based on the observation with an electron microscope,
• 50% particle diameter D50 in a volume-based cumulative particle size distribution of 1 to 3.3 μm,
• a ratio of the 50% particle diameter D50 in a volume-based cumulative particle size distribution to the average particle diameter DSEM (D50/DSEM) of 1 to 4, and
• a ratio of the 90% particle diameter D90 in the volume-based cumulative particle size distribution to the 10% particle diameter D10 in the volume-based cumulative particle size distribution (D90/D10) of 4 or less, and
• the positive electrode active material layer has a void fraction of 10 to 37%,
• LipNixCoyM1zO2+α Formula (1)
• in the formula (1), p, x, y, z, and α satisfy 1.0≤p≤1.3, 0.3≤x≤0.95, 0≤y≤0.4, 0≤z≤0.5, x+y+z=1, and −0.1≤α≤0.1, and M1 represents at least one of Mn and Al.