lithium transition metal oxide powder for use in a rechargeable battery, process for covering a lithium transition metal oxide powder (m) with a lif coating, and use of a lithium transition metal oxide powder lithium.

摘要

lithium transition metal oxide powder for use in a rechargeable battery, process for covering a lithium transition metal oxide powder (m) with a lif coating, and use of a transition metal oxide powder Lithium A lithium transition metal oxide powder for use in a rechargeable battery is described, wherein the surface of the primary particles of said powder is coated with the lif layer, which layer consists of a reaction product of a polymer. containing fluorine and a primary particle surface. lithium from lif originates from the surface of the primary particle. Examples of the fluorine-containing polymer are either one of pvdf, pvdf-hfp or ptfe. Examples of the lithium transition metal oxide are either one of lithic ~ d ~ m ~ e ~ o ~ 2 ~, where m is or one of both of mg and ti, with e 0.02 and d + e = 1; - li ~ 1 ~ + ~ a ~ m '~ 1 ~ + ~ 2 sym ~ b ~ m ^ 1 ^ ks ~ m ~ with -0.03 a 0.06, b 0.02, m 'being a transition metal compound consisting of at least 95% of one or more elements of the group ni, mn, co and ti; m ^ 1 ^ consisting of or one or more elements of the group ca, sr, y, la, ce and zr, having 0 k 243 0.1% by weight; and 0 243 0.624 m being expressed in% mol; e - li ~ a ~ 'ni ~ x ~ co ~ y ~ m "~ z ~ o ~ 2 ~ sym and a ~ f ~, with 0.9 a' 1.1, 0.5 243 x 243 0.9, 0 y 243 0.4, 0 z 243 0.35, and 0.02, 0 243 f 243 0.05 and 0.9 (x + y + z + f) 1.1; m "consisting of one or more elements of the group al, mg, and ti; a consisting of one or more both of s and c.