Umicore

Umicore Korea, Ltd.

Liang Zhu

Maxime Blangero

Kris Driesen

YuRi Lee

Jens M Paulsen

Randy De Palma

Dae-Hyun Kim

Kasper Lambrighs

Sung Jun Cho

The present invention provides a process is presented for preparing a positive electrode active material for rechargeable lithium ion batteries. The process comprises a sintering step having a short sintering time. This improves the production throughput. More particularly, the process applies to positive electrode active material powders having a general formula Li(NiMnCoMe)O, wherein Me comprises at least one element of the group consisting of Al, Mg, Ti, Zr, W, Nb, B, and Sr, with −0.1≤a≤0.1, 0.33≤x≤0.95, 0≤y≤0.35, 0<z≤0.35, 0≤c≤0.05, and x+y+z+c=1. The sintering step is performed for a predefined sintering time t, expressed in hours, and at a predefined temperature T, expressed in ° C., such that 0.3≤t≤6.0, and 1140+50 Log(6/t)−580 x≤T≤1245+50 Log(6/t)−580 x.

Process for preparing a positive electrode material for rechargeable lithium ion batteries

The present invention relates to positive electrode active materials in rechargeable lithium-ion batteries having a difference in cobalt concentration between the center and the edge of particle.

Positive electrode active material for a rechargeable lithium-ion battery

A precursor compound for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor being either one of a metal-bearing M′-hydroxide, -oxyhydroxide or -carbonate, with M′=NiMnCOAwith x>0, y>0, 0.70≤1-x-y-z≤0.95 and 0≤z<0.1, the precursor comprising having a core comprising a metal-bearing compound M′and a shell comprising a metal-bearing compound M′, wherein M′=NiMnCOAwith 0<xc≤0.2, 0<yc≤0.2, 0≤zc<0.1 and 0.75≤1-x-y-z≤0.95, and M′=NiMnCOAwith 0<xs≤0.25, 0.75<ys≤0.95, 0≤zs<0.1 and 0≤≤0.10.

Precursor of a positive electrode material for a rechargeable lithium-ion battery

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Olen, Belgium

Liang Zhu