POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALL-SOLID-STATE LITHIUM ION BATTERY, POSITIVE ELECTRODE FOR ALL-SOLID-STATE LITHIUM ION BATTERY, ALL-SOLID-STATE LITHIUM ION BATTERY, AND METHOD OF PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALL-SOLID-STATE LITHIUM ION BATTERY

摘要

To provide a positive electrode active material for an all-solid-state lithium ion battery, having good rate characteristics when applied to an all-solid-state lithium ion battery.SOLUTION: A positive electrode active material for an all-solid-state lithium ion battery has a composition represented by LiNiCoMnMO(where, a+b+c+d=1, 1.0≤x≤1.1, 0d/(a+b+c)≤0.1, and 0α≤0.2 are satisfied, and M is Nb or comprises Nb and at least one selected from among Ti, Mg, Al, Zr, Mo, and W), has an S content of 100 mass ppm or less, and is aspherical particles. In the positive electrode active material, Ni, Co, Mn, and M other than Al are all uniformly dispersed in EDX measurement of a particle cross section.SELECTED DRAWING: None