Metal composites

Abstract

Providing metal composite compounds that can be used to manufacture highly durable lithium-ion batteries. [Solution] A metal composite compound containing at least Ni, obtained by measuring the powder of the metal composite compound using scanning electron microscopy-energy dispersive X-ray spectroscopy, is used to obtain a scatter plot on which the projected area equivalent diameter (μm) of the particles of the metal composite compound is on the horizontal axis and the Ni content (mol%) of the particles of the metal composite compound is on the vertical axis. The slope S of the approximate straight line calculated by the least squares method is greater than 0.2, and in the volume-based particle size distribution, the particle size D is such that the cumulative volume percentage from the smallest particle side is 10%. 10 When (μm), the above D 10 A metal composite compound in which X, the standard deviation of the Ni content (mol%) in particles with a projected area equivalent diameter of (μm) or less, is 1.6 mol% or more.