Patents by Inventor Ruying Li
Ruying Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9539643Abstract: A method of making metal nanostructures having a nanometer size in at least one dimension includes preparing an aqueous solution comprising a cation of a first metal and an anion, and mixing commercial elemental powder particles of an elemental second metal having a greater reduction potential than the first metal with the aqueous solution in an amount that reacts and dissolves all of the second metal and precipitates the first metal as metal nanostructures. The temperature and concentration of the aqueous solution and the selection of the anions and the second metal are chosen to produce metal nanostructures of a desired shape, for example ribbons, wires, flowers, rods, spheres, hollow spheres, scrolls, tubes, sheets, hexagonal sheets, rice, cones, dendrites, or particles.Type: GrantFiled: February 12, 2010Date of Patent: January 10, 2017Assignee: GM Global Technology Operations LLCInventors: Xueliang Sun, Gaixia Zhang, Mei Cai, Shuhui Sun, Ruying Li
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Patent number: 9531006Abstract: This invention provides a method for mass production of silicon nanowires and/or nanobelts. The invented method is a chemical etching process employing an etchant that preferentially etches and removes other phases from a multiphase silicon alloy, over a silicon phase, and allows harvesting of the residual silicon nanowires and/or nanobelts. The silicon alloy comprises, or is treated so as to comprise, one-dimensional and/or two-dimensional silicon nanostructures in the microstructure of the multi-phase silicon alloy prior to etching. When used as anode for secondary lithium batteries, the silicon nanowires or nanobelts produced by the invented method exhibit high storage capacity.Type: GrantFiled: December 31, 2013Date of Patent: December 27, 2016Assignee: SPRINGPOWER INTERNATIONAL INCORPORATEDInventors: Xueliang Sun, Yuhai Hu, Xifei Li Li, Ruying Li, Quanmin Yang
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Publication number: 20150099173Abstract: This invention provides a method for mass production of silicon nanowires and/or nanobelts. The invented method is a chemical etching process employing an etchant that preferentially etches and removes other phases from a multiphase silicon alloy, over a silicon phase, and allows harvesting of the residual silicon nanowires and/or nanobelts. The silicon alloy comprises, or is treated so as to comprise, one-dimensional and/or two-dimensional silicon nanostructures in the microstructure of the multi-phase silicon alloy prior to etching. When used as anode for secondary lithium batteries, the silicon nanowires or nanobelts produced by the invented method exhibit high storage capacity.Type: ApplicationFiled: December 31, 2013Publication date: April 9, 2015Inventors: Xueliang SUN, Yuhai HU, Xifei Li LI, Ruying LI, Quanmin YANG
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Patent number: 8709127Abstract: Platinum particles have been formed as porous, hollow tubular dendrites by using silver dendrite particles in a galvanic replacement reaction conducted in an aqueous solution of a platinum compound. The dendritic platinum particles have been found useful as catalysts and particularly useful as a hydrogen-oxidation electrocatalyst and/or an oxygen-reduction catalyst in a polymer electrolyte membrane fuel cell.Type: GrantFiled: September 14, 2011Date of Patent: April 29, 2014Assignees: GM Global Technology Operations LLC, The University of Western OntarioInventors: Mei Cai, Xueliang Sun, Gaixia Zhang, Shuhui Sun, Ruying Li
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Patent number: 8709602Abstract: Tin powder is heated in a flowing stream of an inert gas, such as argon, containing a small concentration of carbon-containing gas, at a temperature to produce metal vapor. The tin deposits as liquid on a substrate, and reacts with the carbon-containing gas to form carbon nanotubes in the liquid tin. Upon cooling and solidification, a composite of tin nanowires bearing coatings of carbon nanotubes is formed.Type: GrantFiled: August 13, 2012Date of Patent: April 29, 2014Assignees: GM Global Technology Operations LLC, The University of Western OntarioInventors: Xueliang Sun, Ruying Li, Yuqin Zhou, Mei Cai, Hao Liu
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Patent number: 8591990Abstract: An arrangement of elongated nanowires that include titanium silicide or tungsten silicide may be grown on the exterior surfaces of many individual electrically conductive microfibers of much larger diameter. Each of the nanowires is structurally defined by an elongated, centralized titanium silicide or tungsten silicide nanocore that terminates in a distally spaced gold particle and which is co-axially surrounded by a removable amorphous nanoshell. A gold-directed catalytic growth mechanism initiated during a low pressure chemical vapor deposition process is used to grow the nanowires uniformly along the entire length and circumference of the electrically conductive microfibers where growth is intended. The titanium silicide- or tungsten silicide-based nanowires can be used in a variety electrical, electrochemical, and semiconductor applications.Type: GrantFiled: March 25, 2011Date of Patent: November 26, 2013Assignees: GM Global Technology Operations LLC, The University of Western OntarioInventors: Mei Cai, Xueliang Sun, Yong Zhang, Mohammad Norouzi Banis, Ruying Li
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Patent number: 8409659Abstract: Metal oxide nanowires and carbon-coated metal nanowires are effective as supports for particles of an expensive catalyst material, such as platinum metal group catalyst. Such supported catalysts are useful when included in an electrode on, for example, a proton exchange membrane in a hydrogen/oxygen fuel cell. For example, tin oxide nanowires are formed on carbon fibers of carbon paper and platinum nanoparticles are deposited on the tin oxide nanowires. The nanowires provide good surfaces for effective utilization of the platinum material.Type: GrantFiled: November 13, 2007Date of Patent: April 2, 2013Assignees: GM Global Technology Operations LLC, The University of Western OntarioInventors: Xueliang Sun, Madhu S. Saha, Ruying Li, Mei Cai
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Publication number: 20120308818Abstract: Tin powder is heated in a flowing stream of an inert gas, such as argon, containing a small concentration of carbon-containing gas, at a temperature to produce metal vapor. The tin deposits as liquid on a substrate, and reacts with the carbon-containing gas to form carbon nanotubes in the liquid tin. Upon cooling and solidification, a composite of tin nanowires bearing coatings of carbon nanotubes is formed.Type: ApplicationFiled: August 13, 2012Publication date: December 6, 2012Applicants: THE UNIVERSITY OF WESTERN ONTARIO, GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Xueliang SUN, Ruying LI, Yuqin ZHOU, Mei CAI, Hao LIU
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Publication number: 20120241192Abstract: An arrangement of elongated nanowires that include titanium silicide or tungsten silicide may be grown on the exterior surfaces of many individual electrically conductive microfibers of much larger diameter. Each of the nanowires is structurally defined by an elongated, centralized titanium silicide or tungsten silicide nanocore that terminates in a distally spaced gold particle and which is co-axially surrounded by a removable amorphous nanoshell. A gold-directed catalytic growth mechanism initiated during a low pressure chemical vapor deposition process is used to grow the nanowires uniformly along the entire length and circumference of the electrically conductive microfibers where growth is intended. The titanium silicide- or tungsten silicide-based nanowires can be used in a variety electrical, electrochemical, and semiconductor applications.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Applicants: THE UNIVERSITY OF WESTERN ONTARIO, GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Mei Cai, Xueliang Sun, Yong Zhang, Mohammad Norouzi Banis, Ruying Li
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Patent number: 8263180Abstract: Tin powder is heated in a flowing stream of an inert gas, such as argon, containing a small concentration of carbon-containing gas, at a temperature to produce metal vapor. The tin deposits as liquid on a substrate, and reacts with the carbon-containing gas to form carbon nanotubes in the liquid tin. Upon cooling and solidification, a composite of tin nanowires bearing coatings of carbon nanotubes is formed.Type: GrantFiled: August 19, 2010Date of Patent: September 11, 2012Assignees: GM Global Technology Operations LLC, The University of Western OntarioInventors: Xueliang Sun, Ruying Li, Yuqin Zhou, Mei Cai, Hao Liu
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Publication number: 20120003563Abstract: Platinum particles have been formed as porous, hollow tubular dendrites by using silver dendrite particles in a galvanic replacement reaction conducted in an aqueous solution of a platinum compound. The dendritic platinum particles have been found useful as catalysts and particularly useful as a hydrogen-oxidation electrocatalyst and/or an oxygen-reduction catalyst in a polymer electrolyte membrane fuel cell.Type: ApplicationFiled: September 14, 2011Publication date: January 5, 2012Applicants: THE UNIVERSITY OF WESTERN ONTARIO, GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Mei CAI, Xueliang SUN, Gaixia ZHANG, Shuhui SUN, Ruying LI
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Patent number: 8043598Abstract: Rare earth element(s) doped alumina nanowires are formed by a thermal evaporation method in which vapor from aluminum powder and vapor from a rare earth element compound (such as an halide) are reacted in an oxygen-containing inert gas stream to form alumina which deposits as alumina nanowires and as a rare earth element and oxygen-containing material that deposits with and/or on the alumina nanowires. Where the RE-doped alumina nanowires are to be used as catalyst supports, a catalyst material, such as platinum, may be deposited as small particles on the nanowires.Type: GrantFiled: November 26, 2008Date of Patent: October 25, 2011Assignees: GM Global Technology Operations LLC, The University of Western OntarioInventors: Mei Cai, Xueliang Sun, Yong Zhang, Ruying Li
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Patent number: 8034408Abstract: Metal powder (such as tin, titanium, or tungsten powder) is heated in a flowing stream of an inert gas, such as argon, containing a small abundance of oxygen at a temperature to produce metal vapor. The metal reacts with the oxygen to form and deposit one-dimensional nanostructures of oxygen-containing metal on the metal powder (in the case of Ti and W) or on a suitable nearby substrate in the case of the lower melting tin. The metal oxides are not necessarily stoichiometric compounds. Water may be introduced into the flowing inert gas to increase or control the oxygen content. Sulfur vapor or a carbon source may be introduced to dope the nanostructures with sulfur or carbon. Reaction conditions may be modified to vary the shapes of the one-dimensional nanostructures.Type: GrantFiled: September 6, 2007Date of Patent: October 11, 2011Assignees: GM Global Technology Operations LLC, University of Western OntarioInventors: Xueliang Sun, Ruying Li, Yuqin Zhou, Mei Cai, Hao Liu
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Publication number: 20110197710Abstract: A method of making metal nanostructures having a nanometer size in at least one dimension includes preparing an aqueous solution comprising a cation of a first metal and an anion, and mixing commercial elemental powder particles of an elemental second metal having a greater reduction potential than the first metal with the aqueous solution in an amount that reacts and dissolves all of the second metal and precipitates the first metal as metal nanostructures. The temperature and concentration of the aqueous solution and the selection of the anions and the second metal are chosen to produce metal nanostructures of a desired shape, for example ribbons, wires, flowers, rods, spheres, hollow spheres, scrolls, tubes, sheets, hexagonal sheets, rice, cones, dendrites, or particles.Type: ApplicationFiled: February 12, 2010Publication date: August 18, 2011Applicants: THE UNIVERSITY OF WESTERN ONTARIO, GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Xueliang Sun, Gaixia Zhang, Mei Cai, Shuhui Sun, Ruying Li
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Publication number: 20100316873Abstract: Tin powder is heated in a flowing stream of an inert gas, such as argon, containing a small concentration of carbon-containing gas, at a temperature to produce metal vapor. The tin deposits as liquid on a substrate, and reacts with the carbon-containing gas to form carbon nanotubes in the liquid tin. Upon cooling and solidification, a composite of tin nanowires bearing coatings of carbon nanotubes is formed.Type: ApplicationFiled: August 19, 2010Publication date: December 16, 2010Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INCInventors: Xueliang Sun, Ruying Li, Yuqin Zhou, Mei Cai, Hao Liu
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Publication number: 20100130351Abstract: Rare earth element(s) doped alumina nanowires are formed by a thermal evaporation method in which vapor from aluminum powder and vapor from a rare earth element compound (such as an halide) are reacted in an oxygen-containing inert gas stream to form alumina which deposits as alumina nanowires and as a rare earth element and oxygen-containing material that deposits with and/or on the alumina nanowires. Where the RE-doped alumina nanowires are to be used as catalyst supports, a catalyst material, such as platinum, may be deposited as small particles on the nanowires.Type: ApplicationFiled: November 26, 2008Publication date: May 27, 2010Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC, THE UNIVERSITY OF WESTERN ONTARIOInventors: Mei Cai, Xueliang Sun, Yong Zhang, Ruying Li
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Publication number: 20090004552Abstract: Metal oxide nanowires and carbon-coated metal nanowires are effective as supports for particles of an expensive catalyst material, such as platinum metal group catalyst. Such supported catalysts are useful when included in an electrode on, for example, a proton exchange membrane in a hydrogen/oxygen fuel cell. For example, tin oxide nanowires are formed on carbon fibers of carbon paper and platinum nanoparticles are deposited on the tin oxide nanowires. The nanowires provide good surfaces for effective utilization of the platinum material.Type: ApplicationFiled: November 13, 2007Publication date: January 1, 2009Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., THE UNIVERSITY OF WESTERN ONTARIOInventors: Xueliang Sun, Madhu S. Saha, Ruying Li, Mei Cai
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Publication number: 20080292789Abstract: Metal powder (such as tin, titanium, or tungsten powder) is heated in a flowing stream of an inert gas, such as argon, containing a small abundance of oxygen at a temperature to produce metal vapor. The metal reacts with the oxygen to form and deposit one-dimensional nanostructures of oxygen-containing metal on the metal powder (in the case of Ti and W) or on a suitable nearby substrate in the case of the lower melting tin. The metal oxides are not necessarily stoichiometric compounds. Water may be introduced into the flowing inert gas to increase or control the oxygen content. Sulfur vapor or a carbon source may be introduced to dope the nanostructures with sulfur or carbon. Reaction conditions may be modified to vary the shapes of the one-dimensional nanostructures.Type: ApplicationFiled: September 6, 2007Publication date: November 27, 2008Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., THE UNIVERSITY OF WESTERN ONTARIOInventors: Xueliang Sun, Ruying Li, Yuqin Zhou, Mei Cai, Hao Liu
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Patent number: 7250188Abstract: Metal catalyst particles are deposited on carbon nanotubes by preparing a silane solution of a metal catalyst salt, e.g. platinum or ruthenium chloride, immersing an electrically conducting substrate carrying nanotubes in the silane solution to yield a composite structure of substrate, nanotubes and catalyst, and reducing the composite structure to yield a composite of substrate, carbon nanotubes and metallic catalyst particles.Type: GrantFiled: March 31, 2004Date of Patent: July 31, 2007Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defense of her Majesty's Canadian GovernmentInventors: Jean Pol Dodelet, Xuellang Sun, Ruying Li, Dominique Villers, Sylvain Desilets
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Publication number: 20050220988Abstract: Metal catalyst particles are deposited on carbon nanotubes by preparing a silane solution of a metal catalyst salt, e.g. platinum or ruthenium chloride, immersing an electrically conducting substrate carrying nanotubes in the silane solution to yield a composite structure of substrate, nanotubes and catalyst, and reducing the composite structure to yield a composite of substrate, carbon nanotubes and metallic catalyst particles.Type: ApplicationFiled: March 31, 2004Publication date: October 6, 2005Inventors: Jean Dodelet, Xueliang Sun, Ruying Li, Dominique Villers, Sylvain Desilets