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US 8,828,481 B2Granted
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
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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.
Claims17
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.
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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;
- 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;
- wherein said silicon-coated carbon material has a graded interface.
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Dependencies are inferred from the claim text.