Porous carbon product and method for producing an electrode for a rechargeable lithium battery

摘要

A known method for producing a porous carbon body comprises providing a template of inorganic template material which comprises interconnected pores, providing a precursor substance for carbon, infiltrating the pores of the template with the precursor substance, carbonizing the precursor substance and removing the template with formation of the porous carbon product. Starting therefrom, to provide a method which allows a cost-effective production of a porous carbon structure also with thick wall thicknesses, it is suggested according to the invention that precursor substance particles of fusible material and template particles are provided and a powder mixture is formed from the particles, and that the powder mixture is heated before or during carbonization according to method step (d) in such a manner that precursor substance melt penetrates into the pores of the template particles.

主权项

1. A method for producing a porous carbon product, the method comprising the following steps:
(a) providing a template comprising template particles of inorganic template material having interconnected pores, said providing comprising
i) converting a feedstock material into the inorganic template material by flame hydrolysis or pyrolysis,ii) depositing the inorganic template material on a deposition surface so as to form a soot body, andiii) fragmentizing the soot body so as to form the template particles; (b) providing a precursor substance for carbon comprising precursor substance particles of fusible material; (c) infiltrating the pores of the template with the precursor substance; (d) carbonizing the precursor substance; (e) removing the template so as to form the porous carbon product,
wherein a powder mixture is formed from the template particles and the precursor substance, andwherein the powder mixture is heated before or during the carbonizing so as to form a melt of the precursor substance that penetrates into the pores of the template particles.