Method of depositing silicon on carbon materials and forming an anode for use in lithium ion batteries

摘要

A method of modifying the surface of carbon materials such as vapor grown carbon nanofibers is provided in which silicon is deposited on vapor grown carbon nanofibers using a chemical vapor deposition process. The resulting silicon-carbon alloy may be used as an anode in a rechargeable lithium ion battery.

主权项

1. A method of depositing silicon onto a carbon material to form an alloy for use in lithium ion batteries comprising: providing a carbon material selected from vapor grown carbon fibers, vapor grown carbon nanofibers, and PAN or pitch derived carbon fibers; wherein said carbon material further includes a carbide material selected from metal carbides, and silicon carbides; heating said carbon material at a temperature between about 100° C. to about 1200° C.; flowing a silicon-containing precursor gas in contact with said carbon material for a time sufficient for said gas to decompose and form a coating on at least the surface of said carbon material.