Method of depositing silicon on carbon materials and forming an anode for use in lithium ion batteries
AssigneeApplied Sciences, Inc.
InventorsDavid J. Burton, Max L. Lake, Maryam Nazri
Life of this patent
Estimating the term…
Abstract
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.
Claims20
An anode for use in a lithium ion battery, said anode formed by:
- providing a carbon material selected from vapor grown carbon fibers, vapor grown carbon nanofibers, and PAN or pitch derived carbon fibers;
- 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;
- and
- adding a binder to said silicon-coated carbon material.
A lithiated carbon-silicon alloy formed by providing a carbon material selected from vapor grown carbon fibers, vapor grown carbon nanofibers, PAN or pitch derived carbon fibers, graphite flakes, graphene platelets, and carbon nanotubes;
- 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;
- and
- depositing lithium on the silicon-coated carbon material by evaporation.
Dependencies are inferred from the claim text.