| abstract |
A lithium composite metal oxide powder contains at least Li, Ni, an element X and an element M. The element X is at least one element selected from the group consisting of Co, Mn, Fe, Cu, Ti, Mg, Al, W, Mo, Nb, Zn, Sn, Zr, Ga and V. The element M is at least one element selected from the group consisting of B, Si, S and P. A ratio M/(Ni+X) which indicates the amount of the element M relative to the total amount of Ni and the element X exceeds 0 mol % but is not more than 5 mol %. The lithium composite metal oxide powder contains core particles and a coating substance. The coating substance contains a compound produced by reaction of the element M and lithium. A weight reduction percentage 1 when a thermogravimetric measurement is conducted under specific measurement conditions 1 is not more than 0.15 wt %. |