Abstract: 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.

Abstract: 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.

Abstract: 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 OySiHx groups, with 1<x<3, 1?y?3, and x>y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Abstract: An electrode assembly for a rechargeable Li-ion battery, comprising a current collector provided with an electrode composition comprising carboxymethyl cellulose (CMC) binder material and silicon powder provided with a layer of SiO2 or silicon suboxides SiOx, with 0<x?2, such that the oxygen content of said silicon is between 3 and 18% by weight.

Abstract: 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 SiOx, with 0<x<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.

Abstract: 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 SiOx, with 0<x<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.

Abstract: The present invention relates to a negative electrode material for a lithium ion battery, made of a composite material comprising silicon-containing particles, artificial graphite particles and a carbon coating layer, wherein the silicon-containing particles are silicon particles having a SiOx layer (0<x?2) on a particle surface, have an oxygen content ratio of 1 mass % or more and 18 mass % or less, and mainly comprise particles having a primary particle diameter of 200 nm or less; and the artificial graphite particles have a scale-like shape. By using the negative electrode material, a lithium ion battery having a high capacitance and excellent charge-discharge cycle characteristics can be produced.

Abstract: 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<x?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 ?m or more and 15.0 ?m or less. Also disclosed is a lithium-ion battery including a negative electrode using the negative electrode material.

Abstract: 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—C chemical bonds present.

Abstract: 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.

Abstract: 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 ?m or less, or the silicon-based domains are not at all agglomerated into agglomerates.

Abstract: 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.

Abstract: 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 ?m or less, or the silicon-based domains are not at all agglomerated into agglomerates.

Abstract: 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 OySiHx groups, with 1<x<3, 1?y?3, and x>y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Abstract: The invention relates to An active material for a rechargeable lithium ion battery, comprising metal (M) based particles and a silicon oxide SiOx with 0<x<2, wherein said SiOx is an intimate mixture of amorphous silicon (Si) and crystalline silicon dioxide (SiO2); wherein the metal (M) is preferably selected from the group consisting of Si, Sn, In, Al, Fe and combinations thereof.

Abstract: The invention relates to a negative electrode powder for a lithium-ion rechargeable battery comprising a mixture comprising carbon and SiOx, with 0<x<1, wherein the SiOx consists of a nanometric composite of crystalline SiO2 and amorphous Si. The method for preparing the powder comprises the steps of providing an aqueous solution comprising an anti-agglomeration agent, dispersing a silicon comprising organic compound in the aqueous solution, hydrothermally treating the aqueous solution at a temperature between 90 and 180° C. for a period of 0.5 to 24 h, preferably between 110 and 140° C. for a period of 0.5 to 4 h, thereby forming a suspension of SiO2 and Si in the aqueous solution, evaporating the solution, thereby obtaining a slurry, subjecting the slurry to a coking process whereby a solid residue is formed, calcining the solid residue at a temperature between 500 and 1300° C., preferably between 600 and 1000° C., in a non-oxidizing atmosphere.

Abstract: The invention relates to a powder comprising particles containing a core and a shell, said powder preferably having a surface area (BET) of at most 50 m2/g, said core containing silicon (Si) and said shell containing silicon oxide SiOx with 0<x?2, wherein said silicon oxide contains Sin+ cations with n being an integer from 1 to 4, wherein said silicon oxide contains Si4+ cations in an amount of at least 70 mol % from the total amount of Sin? cations.

Abstract: The present invention relates to a negative electrode material for a lithium ion battery, made of a composite material comprising silicon-containing particles, artificial graphite particles and a carbon coating layer, wherein the silicon-containing particles are silicon particles having a SiOx layer (0<x?2) on a particle surface, have an oxygen content ratio of 1 mass % or more and 18 mass % or less, and mainly comprise particles having a primary particle diameter of 200 nm or less; and the artificial graphite particles have a scale-like shape. By using the negative electrode material, a lithium ion battery having a high capacitance and excellent charge-discharge cycle characteristics can be produced.

Abstract: 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 (1); pulverizing the mixture (1) to obtain a pulverized product (2a); dry-mixing the pulverized product (2a) and carbon particles (B) to obtain a mixture (3a); and firing the mixture (3a), followed by pulverization; or including the steps of: adding carbon particles (B) to the mixture (1), followed by dry mixing and pulverizing, to obtain a pulverized product (2b); and firing the pulverized product (2b), followed by pulverization.

Abstract: 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 SiOx, with 0<x<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.