Umicore

Showa Denko K.k.

Nicolas Marx

Stijn Put

Nobuaki Ishii

Jan Gilleir

Dirk Van Genechten

Jean-Sébastien Bridel

Masataka Takeuchi

Boaz Moeremans

Delphine Longrie

Dan V Goia

Kris Driesen

Hirokazu Murata

Arihiro Muto

Yasunari Otsuka

Kun Feng

Sam Siau

John I Njagi

Michal Tulodziecki

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 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

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

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.

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, method for manufacturing a composite powder and lithium ion battery

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.

Positively charged silicon for lithium-ion batteries

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&#x3c;x&#x2264;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.

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Geel, Belgium

Nicolas Marx