Umicore

Umicore Korea, Ltd.

Dongjoon Ihm

Stijn Put

Daniël Nelis

Jean-Sébastien Bridel

A rechargeable electrochemical cell comprising a negative electrode and a positive electrode is described. The positive electrode comprises a product having as overall formula Lip(NiMnCoMAlA)O, wherein M signifies one or more elements from the group Mg, Ti, Cr, V and Fe, wherein A signifies one or more elements from the group F, C, Cl, S, Zr, Ba, Y, Ca, B, Sn, Sb, Na and Zn, and wherein 0.9&#x3c;(x+y+z+m+n+a)&#x3c;1.1, b&#x3c;0.02, 0.9&#x3c;p&#x3c;1.110, 0.30&#x3c;x&#x3c;0.95, (y+z)&#x2265;0.09, 0&#x2264;m&#x2264;0.05, 0&#x2264;a&#x2264;0.05, and 0&#x2264;n&#x2264;0.15. The negative electrode comprises composite particles, wherein the composite particles comprise silicon-based domains in a matrix material. The individual silicon-based domains are either free silicon-based domains that are not or not completely embedded in the matrix or are fully embedded silicon-based domains that are completely surrounded by the matrix material.

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Cheonan, South Korea

Dongjoon Ihm