Umicore

Showa Denko K.k.

Umicore Korea, Ltd.

Stijn Put

Nicolas Marx

Kris Driesen

Dirk Van Genechten

Masataka Takeuchi

Nobuaki Ishii

Jean-Sébastien Bridel

Jan Gilleir

Daniël Nelis

Arihiro Muto

Yasunari Otsuka

Hailei Zhao

Delphine Longrie

Dan V Goia

Bernard Lestriez

Jean Scoyer

Hirokazu Murata

Jean-Sebastien Bridel

Boaz Moeremans

Jing Wang

Yvan A Strauven

Michael Gilles

Jin Hu

Kun Feng

Arihiro Mutoh

Mohamed Ati

John I Njagi

Michal Tulodziecki

Sam Siau

Nathalie Delpuech

Yves Van Rompaey

Sylvain Van Den Rul

Philippe Moreau

Dongjoon Ihm

Nicolas Dupre

Daniel Nelis

Akihiro Muto

A powder for use in a negative electrode of a battery, said powder comprising particles, wherein the particles comprise a carbonaceous matrix material and silicon-based domains dispersed in the carbonaceous matrix material, wherein the particles further comprise pores wherein at least 1000 cross-sections of pores comprised in a cross-section of the powder satisfy optimized conditions of size and size distribution, allowing the battery containing such a powder to achieve a superior cycle life and a production method of such a powder.

Powder for use in the negative electrode of a battery and a battery comprising such a powder

A negative electrode material for lithium ion secondary batteries, including composite material particles containing nanosilicon particles having a 50% particle diameter (D) of 5 to 100 nm in a number-based cumulative particle size distribution of primary particles, graphite particles and an amorphous carbon material; the composite material particles containing the nanosilicon particles at a content of 30 to 60 mass % or less, and the amorphous carbon material at a content of 30 to 60 mass % or less; the composite material particles having a 90% particle diameter (D) in the volume-based cumulative particle size distribution of 10.0 to 40.0 &#x3bc;m, a BET specific surface area of 1.0 to 5.0 m/g, and an exothermic peak temperature in DTA measurement of 830&#xb0; C. to 950&#xb0; C. Also disclosed is a paste for negative electrodes, a negative electrode sheet, a lithium ion secondary battery and a method for manufacturing the negative electrode material.

Negative electrode material for lithium ion secondary batteries, method for manufacturing the same, paste for negative electrode, negative electrode sheet, and lithium ion secondary

Powder comprising particles comprising a matrix material and silicon-based domains dispersed in this matrix material, whereby the matrix material is carbon or a material that can be thermally decomposed to carbon, whereby either part of the silicon-based domains are present in the form of agglomerates of silicon-based domains whereby at least 98% of these agglomerates have a maximum size of 3 &#x3bc;m or less, or the silicon-based domains are not at all agglomerated into agglomerates.

Powder, electrode and battery comprising such a powder

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 composite powder for use in the negative electrode of a battery, whereby the composite powder comprises composite particles, whereby the composite particles comprise a matrix material and silicon, whereby the composite particles have a particle size distribution having a d10 and a d90, whereby over at least part of the size range from d10 to d90 the composite particles have a size-dependent silicon content. Preferably a finer fraction of the composite powder has an average particle size D1 and a silicon content S1 and a coarser fraction of the composite powder has an average particle size D2 and a silicon content S2, whereby a size dependence factor F is defined as follows F=(S2&#x2212;S1)/(D2&#x2212;D1), whereby the absolute value of the size dependence factor F is at least 0.04 wt % silicon/&#x3bc;m.

Composite powder for use in the negative electrode of a battery and a battery comprising such a composite powder

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

An active material powder for use in a negative electrode of a battery, wherein the active material powder comprises active material particles, wherein the active material particles comprise silicon-based particles, wherein when said active material powder is crossed by a plane, then at least 65% of the discrete cross-sections of the silicon-based particles included in that plane, satisfy optimized conditions of shape and size, allowing the battery containing such an active material powder to achieve a superior cycle life and a production method of such an active material powder.

Active material powder for use in a negative electrode of a battery and a battery comprising such an active material powder

Composite powder for use as electrochemically active material in an anode of a lithium ion battery, whereby the particles of the composite powder comprise a carbon-based matrix material and silicon particles embedded in this matrix material, whereby the silicon particles and the matrix material have an interface, characterized in that at this interface there are Si&#x2014;C chemical bonds present.

Composite powder for use in an anode of a lithium ion battery, method for manufacturing a composite powder and lithium ion battery

A negative electrode material for a lithium ion battery, including silicon-containing particles, artificial graphite particles and a carbonaceous material, wherein at least part of the silicon-containing particles, the artificial graphite particles and the carbonaceous material form composite particles; wherein the silicon-containing particles are silicon particles having a SiOx (0&#x3c;x&#x2264;2) layer on the particle surface, having an oxygen content of 1.0 mass % or more and 18.0 mass % or less, and mainly containing particles having a primary particle diameter of 200 nm or less; wherein the artificial graphite particles are non-flaky artificial graphite particles and have a 50% particle diameter in a volume-based cumulative particle size distribution, D50, of 1.0 &#x3bc;m or more and 15.0 &#x3bc;m or less. Also disclosed is a lithium-ion battery including a negative electrode using the negative electrode material.

Negative electrode material for lithium-ion batteries including non-flaky artificial graphite including silicon-containing particles, artificial graphite particles and carbonaceous material

Powder comprising particles comprising a matrix material and silicon-based domains dispersed in this matrix material, whereby either part of the silicon-based domains are present in the form of agglomerates of silicon-based domains whereby at least 98% of these agglomerates have a maximum size of 3 &#x3bc;m or less, or the silicon-based domains are not at all agglomerated into agglomerates.

A production method for a composite of fine particles (A) and carbon particles (B), including the steps of: mixing fine particles (A) formed of a substance comprising at least one kind of Si, Sn, Al, Ge and In; and molten pitch, to obtain a mixture (); pulverizing the mixture () to obtain a pulverized product (); dry-mixing the pulverized product () and carbon particles (B) to obtain a mixture (); and firing the mixture (), followed by pulverization; or including the steps of: adding carbon particles (B) to the mixture (), followed by dry mixing and pulverizing, to obtain a pulverized product (); and firing the pulverized product (), followed by pulverization.

Method for producing composite, and negative electrode material for lithium ion battery

Composite powder for use in an anode of a lithium ion battery, whereby the particles of the composite powder comprise a carbon matrix material and silicon particles embedded in this matrix material, characterized in that the composite powder further comprises silicon carbide.

Composite powder for use in an anode of a lithium ion battery, whereby the particles of the composite powder comprise silicon-based domains in a matrix, whereby 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, whereby the percentage of free silicon-based domains is lower than or equal to 4 weight % of the total amount of Si in metallic or oxidized state in the composite powder.

Composite powder for use in an anode of a lithium ion battery, method of preparing such a composite powder and method for analysing such a composite powder

This invention relates to a negative electrode material for lithium-ion batteries comprising silicon and having a chemically treated or coated surface influencing the zeta potential of the surface. The active material consists of particles or particles and wires comprising a core comprising silicon, wherein the particles have a positive zeta potential in an interval between pH 3.5 and 9.5, and preferably between pH 4 and 9.5. The core is either chemically treated with an amino-functional metal oxide, or the core is at least partly covered with OSiHgroups, with 1&#x3c;x&#x3c;3, 1&#x2264;y&#x2264;3, and x&#x3e;y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Growing community of inventors

Olmen, Belgium

Stijn Put