NANOSTRUCTURED SI-C-COMPOSITE FOR ELECTRODE APPLICATIONS

• Main Authors: ZIMMERMANN JUTTA, PILGRAM PETER, DANNEHL MANFRED, MAISELS ARKADI, STOMMEL YVES GORAT, MIESSEN MARTIN, STENGER FRANK
• Format: Patent
• Language: English
• Published: 21.06.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention relates to a process for producing nanostructured silicon-carbon composites, comprising the (A) introduction of at least one of components (a1) mono- and/or polyhydroxyaromatic compound, and (a2) an aldehyde, and (a3) a catalyst, into a reactor to obtain a composition in which the components react with one another in the presence of the catalyst at a reaction temperature T of 75 to 200° C., and at a pressure of 80 to 2400 kPa, and over a period to of 0.001 to 1 000 000 s, which gives a preliminary gel, and (B) introduction of at least one component (b1) sub-micron silicon powder, in crystalline or amorphous form, into the composition obtained during or after step (A), and then (C) introduction of the product obtained after step (B) into a neutralizing agent selected from an acid if (a3) is a basic catalyst, or an alkali if (a3) is an acidic catalyst, which gives a finely divided product, and (D) drying the product obtained during or after step (C) and then (E) carbonizing the product obtained after step (D) at a temperature of 500 to 1200° C., to the composites themselves, to the use thereof as an anode material for lithium ion cells and batteries, and to the lithium ion cells and batteries.