MANGANESE-NICKEL COMPOSITE OXIDE PARTICLE POWDER, PRODUCTION METHOD THEREFOR, POSITIVE-ELECTRODE ACTIVE MATERIAL PARTICLE POWDER FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, PRODUCTION METHOD THEREFOR, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Positive-electrode active material particle powder for nonaqueous electrolyte secondary batteries has a spinel structure having a composition expressed by a chemical formula (1), and is characterized by having the following characteristic (A) and/or (B) when being indexed with Fd-3m in X-ray diffraction of the positive-electrode active material particle powder. (A) The ratio (I(311)/I(111)) between I(311) and I(111) falls within the range of 35-43%. (B) When the half-value width (B) for each peak position (2?) (10-90 degrees) is set, the inclination of a straight line obtained by the least squares method in a graph with sin? as the horizontal axis and Bcos? as the vertical axis falls within the range of 3.0×10-4-20.0×10-4.