Nanostructured battery active materials and methods of producing same
First Claim
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1. A method for producing nanowires, the method comprising:
- providing a porous substrate having catalyst nanoparticles disposed thereon, wherein the porous substrate comprises a population of particles comprising at least one of graphite particles, graphene particles, carbon black particles, or carbon nanotubes and wherein the catalyst nanoparticles comprise copper, a copper compound, and/or a copper alloy;
loading the porous substrate into a reaction vessel wherein the population of particles with the catalyst nanoparticles disposed thereon form a packed bed in the reaction vessel; and
growing nanowires on the porous substrate in the reaction vessel from the catalyst nanoparticles via a Vapor-Solid-Solid (VSS) synthesis technique, wherein the growing comprises mixing the packed bed while flowing one or more reactant gases in the reaction vessel during the nanowire growing process.
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Abstract
Methods for producing nanostructures from copper-based catalysts on porous substrates, particularly silicon nanowires on carbon-based substrates for use as battery active materials, are provided. Related compositions are also described. In addition, novel methods for production of copper-based catalyst particles are provided. Methods for producing nanostructures from catalyst particles that comprise a gold shell and a core that does not include gold are also provided.
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21 Claims
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1. A method for producing nanowires, the method comprising:
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providing a porous substrate having catalyst nanoparticles disposed thereon, wherein the porous substrate comprises a population of particles comprising at least one of graphite particles, graphene particles, carbon black particles, or carbon nanotubes and wherein the catalyst nanoparticles comprise copper, a copper compound, and/or a copper alloy; loading the porous substrate into a reaction vessel wherein the population of particles with the catalyst nanoparticles disposed thereon form a packed bed in the reaction vessel; and growing nanowires on the porous substrate in the reaction vessel from the catalyst nanoparticles via a Vapor-Solid-Solid (VSS) synthesis technique, wherein the growing comprises mixing the packed bed while flowing one or more reactant gases in the reaction vessel during the nanowire growing process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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