Umicore

Umicore Korea, Ltd.

Daniël Nelis

Jens M Paulsen

Stijn Put

Kris Driesen

Eric Robert

Randy De Palma

Liang Zhu

Jean Scoyer

Jin Hu

Sung Ho Cho

Dae-Hyun Kim

HeonPyo Hong

Jean-Sébastien Bridel

JinDoo Oh

Hyo Sun Ahn

Dirk Vanhoutte

Dongjoon Ihm

Heonpyo Hong

A submicron sized Si based powder having an average primary particle size between 20 nm and 200 nm, wherein the powder has a surface layer comprising SiO, with 0&#x3c;x&#x3c;2, the surface layer having an average thickness between 0.5 nm and 10 nm, and wherein the powder has a total oxygen content equal or less than 3% by weight at room temperature. The method for making the powder comprises a step where a Si precursor is vaporized in a gas stream at high temperature, after which the gas stream is quenched to obtain Si particles, and the Si particles are quenched at low temperature in an oxygen containing gas.

Submicron sized silicon powder with low oxygen content

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.

Rechargeable electrochemical cell and battery

A crystalline precursor compound for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula M(O)(OH)(CO), with 0&#x3c;x&#x2264;1, 0&#x3c;y&#x3c;0.03 and M=NiMnCoA. A being a dopant, with 0.30&#x2264;a&#x3c;0.90, 0.10&#x2264;b&#x3c;0.40, 0.10&#x2264;c&#x3c;0.40, d&#x3c;0.05 and a+b+c+d=1, the precursor having a Na content less than 200 ppm, a S content less than 250 ppm, the precursor having a specific surface area with a BET value expressed in m/g and a tap density TD expressed in g/cm, with a ratio BET/TD&#x3e;30.10cm/g.

Precursors for cathode material with improved secondary battery performance and method to prepare the precursors

This invention relates to an industrial process of manufacturing hydroxide precursor for lithium transition metal oxide used in secondary lithium ion batteries. More particularly, this process utilizes highly concentrated nitrate salts and is designed to mitigate waste production.

Nitrate process for manufacturing transition metal hydroxide precursors

A method for producing a M-carbonate precursor of a Li-M oxide cathode material in a continuous reactor, wherein M=NixMnyCozAn, A being a dopant, with x&#x3e;0, y&#x3e;0, 0&#x2264;z&#x2264;0.35, 0&#x2264;n&#x2264;0.02 and x+y+z+n=1, the method comprising the steps of: &#x2014;providing a feed solution comprising Ni-, Mn-, Co- and A-ions, and having a molar metal content M&#x2033; feed, &#x2014;providing an ionic solution comprising either one or both of a carbonate and a bicarbonate solution, the ionic solution further comprising either one or both of Na- and K-ions, &#x2014;providing a slurry comprising seeds comprising M'-ions and having a molar metal content M&#x2032; seeds, wherein M&#x2032;=Nix&#x2032;Mny&#x2032;Coz&#x2032;A&#x2032;n&#x2032;, A&#x2032; being a dopant, with 0&#x2264;x&#x2032;&#x2264;1, 0&#x2264;y&#x2032;&#x2264;1, 0&#x2264;z&#x2032;&#x2264;1, 0&#x2264;n&#x2032;&#x2264;1 and x&#x2032;+y&#x2032;+z&#x2032;+n&#x2032;=1, and wherein the molar ratio M&#x2032; seeds/M&#x2033; feed is between 0.001 and 0.1, &#x2014;mixing the feed solution, the ionic solution and the slurry in the reactor, thereby obtaining a reactive liquid mixture, &#x2014;precipitating a carbonate onto the seeds in the reactive liquid mixture, thereby obtaining a reacted liquid mixture and the M-carbonate precursor, and &#x2014;separating the M-carbonate precursor from the reacted liquid mixture.

Carbonate precursors for lithium nickel manganese cobalt oxide cathode material and the method of making same

A particulate precursor compound for manufacturing a lithium transition metal (M)-oxide powder for use as an active positive electrode material in lithium-ion batteries, wherein (M) is NiMnCoA, A being a dopant, wherein 0.33&#x2264;x&#x2264;0.60, 0.20&#x2264;y&#x2264;0.33, and 0.20&#x2264;z&#x2264;0.33, v&#x2264;0.05, and x+y+z+v=1, the precursor comprising Ni, Mn and Co in a molar ratio x:y:z and having a specific surface area BET in m/g and a sulfur content S expressed in wt %, wherein formula (I).

Precursors for lithium transition metal oxide cathode materials for rechargeable batteries

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Peer, Belgium

Daniël Nelis