Method for producing composite powder, and for a porous composite material for electrochemical electrodes that is produced using the composite powder

US9960410B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Christian Neumann · Hungen, DE
• Jörg Becker · Florstadt, DE
• Sascha Pihan · Aschaffenburg, DE
• Matthias Otter · Hamm, DE

Key dates

• Filing date: Jun 12, 2013
• Grant date: May 1, 2018
• Expiry date: Sep 25, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to a method for economically producing a composite powder made of carbon and electrochemical active material. According to the invention, a melt made of a meltable carbon precursor substance having nanoparticles made of an active material distributed in the melt is provided, and said melt is divided into the composite powder, in which nanoparticles made of the active material are embedded in a matrix made of the carbon precursor substance. A porous composite material produced using the composite powder is used to produce an electrode for a secondary battery, in particular for use as an anode material. The production of the composite material comprises the following steps: providing template particles made of inorganic template material, producing a powder mixture of the composite powder and the template particles, heating the powder mixture and softening the composite powder in such a way that the composite powder penetrates the pores and is carbonated, and removing the template material to form the porous electrochemical composite material.