Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Wacker-Chemie Gmbh

Other

Eckhard Hanelt

Franz-Heinrich Kreuzer

Horst Leigeber

Michael Fricke

Norman H&auml;berle

Frank Sandmeyer

Koichi Fujisawa

Masato Kuwabara

Wolfram Schindler

Norman Haberle

Harald Hertlein

Peter Gigler

Stefan Haufe

Karl Hesse

Dennis Troegel

J&uuml;rgen K&uuml;pfer

Markus Jandke

Robert Maurer

Jürgen Pfeiffer

Christoph M&uuml;ller-Rees

Christian Schierlinger

Rebecca Bernhard

Daniel Bräunling

Thomas Kammel

Thilo Gebhard

Claudia Kleinlein

Alena Kalyakina

Christoph Dräger

An anode active material for lithium ion batteries includes one or more unaggregated silicon particles having a mass-based chlorine content of from 5 to 200 ppm and a volume-weighted particle size distribution having diameter percentiles dof from 0.5 μm to 10.0 μm.

Silicon particles having a specific chlorine content, as active anode material for lithium ion batteries

The invention relates to methods for producing silicon particles by grinding silicon-containing solids, wherein one or more gases are used, which contain reactive gas at a partial pressure of &#x2265;0.3 bar, wherein reactive gases are selected from the group comprising oxygen, ozone, inorganic peroxides, carbon monoxide, carbon dioxide, ammonia, nitrogen oxides, hydrogen cyanide, hydrogen sulfide, sulfur dioxide, and volatile organic compounds.

Method for grinding silicon-containing solids

The object of the invention are methods for the production of silicon particles by grinding silicon-containing solids in a jet mill using a grinding fluid containing water vapor.

The invention relates to a method for size-reducing silicon, wherein a mixture containing a suspension containing silicon to be size-reduced and silicon grinding media is set in motion in the grinding space of a grinding media mill. The size-reduced silicon is used as the active material in the anode of a lithium-ion battery.

Method for size-reduction of silicon and use of the size-reduced silicon in a lithium-ion battery

The invention relates to silicon/graphite/carbon composites (Si/G/C-composites), containing graphite (G) and non-aggregated, nanoscale silicon particles (Si), wherein the silicon particles are embedded in a carbon matrix (C). The invention also relates to a method for producing said type of composite, electrode material for lithium ion batteries containing said type of composite and to a lithium ion battery.

Si/G/C-composites for lithium-ion-batteries

A mixture which is polymerizable to polymers exhibiting a high optical anisotropy which is stable during polymerization. The mixture contains a first monomer or (and/or) oligomer having two or more polymerizable functional groups and optionally a mesogenic group; a second monomer or oligomer bearing at least one mesogenic group having an aromatic double ring structure and only one polymerizable group; and from 1 to 50% by weight of a monomer non-polymerizable with the first or second monomer, but which also contains a mesogenic group having an aromatic double ring structure.

Polymerizable mixtures

Reflective liquid crystalline polymer films having increased bandwidth have a single layer of liquid crystalline material with short, long, and medium pitch of the helical molecular structure of the liquid crystalline polymer. The films are easily produced by a readily reproducible and economic process of low complexity.

Liquid crystalline film with broadened reflection bandwidth and process for preparation thereof

Preparation of organosilicon compounds containing &agr;, &bgr;-unsaturated carboxylic acids

The invention relates to nematic organosiloxanes (F) having at least two mesogenic side groups, of which at most one has three nuclei and all the others have two nuclei, where the term nucleus is taken to mean a six-membered ring or a bicyclic structure consisting of six-membered rings, and where at least one of the mesogenic side groups contains a methacryloyl or acryloyl group.

Liquid-crystalline nematic organosiloxanes which can be crosslinked to form optically anisotropic polymer layers

An optically anisotropic film obtained from a mixture comprising a polymer and a liquid crystal compound, wherein retardation of the optically anisotropic film at 80&deg; C., 60&deg; C. or 0&deg; C. measured from a normal direction is 20-97%, 20-99% or 101-150%, respectively, of retardation at 30&deg; C., and an absolute value of a deviation in retardation by said liquid crystal compound is not greater than 6% when the optically anisotropic film is held at 30% for 200 hours, has the temperature dependence in accordance with the temperature dependence of retardation of a liquid crystal display cell, and a small variation of retardation by the liquid crystal compound with the lapse of time, and thus is suitable for use in a liquid crystal display apparatus.

Optically anisotropic film, method of manufacturing the same, and liquid crystal display apparatus

The invention relates to mixtures containing pigments which comprise oriented three-dimensionally crosslinked substances having a liquid-crystalline structure with a chiral phase, and to the use of such mixtures. Pigment and matrix are matched to one another in such a way that on application of the mixture at different temperatures to a substrate, the lowest application temperature and highest application temperature differing by at least 10&deg; C. and by not more than 150&deg; C., there are no visually perceptible color differences of the pigmented paint on the substrate after drying.

Mixture comprising pigments having a liquid-crystalline structure with a chiral phase and its use

The invention relates to a process for the preparation of three-dimensionally crosslinked polymeric materials having a broad cholesteric reflection band, which comprises bringing polymeric materials having cholesteric properties and an extractable material content into contact with a solvent or solvent mixture.

Process for the production of three-dimensionally crosslinked polymeric

Liquid-crystalline materials having a cholesteric phase with a pitch of less than 400 nm, comprising a) liquid-crystalline organosiloxanes containing dianhydrohexitol derivatives as chiral groups, and b) chiral monomeric additives which induce the same helicality as the respective liquid-crystalline organo-siloxanes.

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Geltendorf, Germany

Eckhard Hanelt