Process for producing cathode active material for lithium ion secondary battery

摘要

To provide a process for producing a cathode active material for a lithium ion secondary battery, a cathode for a lithium ion secondary battery, and a lithium ion secondary battery.;A production process which comprises contacting a lithium-containing composite oxide containing Li element and a transition metal element with a composition (1) {an aqueous solution containing cation M having at least one metal element (m)} and a composition (2) {an aqueous solution containing anion N having at least one element (n) selected from the group consisting of S, P, F and B, forming a hardly soluble salt when reacted with the cation M}, wherein the total amount A (mL/100 g) of the composition (1) and the composition (2) contacted per 100 g of the lithium-containing composite oxide is in a ratio of 0.1

主权项

1. A process for producing a cathode active material for a lithium ion secondary battery, comprising:
contacting a lithium-containing composite oxide comprising Li element and a transition metal element with composition (1) and composition (2); and heating the lithium-containing composite oxide, the composition (1), and the composition (2), wherein the total amount A (ml/100 g) of the composition (1) and the composition (2) contacted per 100 g of the lithium-containing composite oxide is in the ratio of 0.7≦A/B based on the oil absorption B (ml/100 g) of the lithium-containing composite oxide, and the contacting of the composition (1) and the composition (2) with the lithium-containing composite oxide is carried out by spraying the composition (1) and the composition (2) to the lithium-containing composite oxide, and by drying the composition (1) and the composition (2) simultaneously or alternatively with the spraying: composition (1): an aqueous solution comprising containing cation M which comprises having at least one metal element (m) selected from the group consisting of Li, Mg, Ca, Sr, Ba, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Cu, Zn, Al, In, Sn, Sb, Bi, La, Ce, Pr, Nd, Gd, Dy, Er and Yb; composition (2): an aqueous solution comprising containing-anion N which comprises having at least one element (n) selected from the group consisting of S, P, F and B, forming a hardly soluble salt when reacted with the cation M.