Patents by Inventor Ionel C. Stefan
Ionel C. Stefan 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: 10490817Abstract: The present invention relates to nanostructured materials (including nanowires) for use in batteries. Exemplary materials include carbon-comprising, Si-based nanostructures, nanostructured materials disposed on carbon-based substrates, and nanostructures comprising nanoscale scaffolds. The present invention also provides methods of preparing battery electrodes, and batteries, using the nanostructured materials.Type: GrantFiled: May 19, 2010Date of Patent: November 26, 2019Assignee: OneD Material LLCInventors: Yimin Zhu, Jay L. Goldman, Jason Hartlove, Hans Jurgen Hofler, Baixin Qian, Vijendra Sahi, Ionel C. Stefan, David P. Stumbo
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Patent number: 9040208Abstract: A catalyst layer for a fuel cell membrane electrode assembly includes a plurality of agglomerates, adjacent ones of the plurality of agglomerates contacting with each other with pores provided between said adjacent ones of the plurality of agglomerates, each of the plurality of agglomerates being formed by packing a plurality of catalysts each consisting of noble metal fine particles supported on a fiber-like support material, adjacent ones of the plurality of catalysts contacting with each other with pores provided between said adjacent ones of the plurality of catalysts, and each of the plurality of catalysts contacting with a plurality of catalysts other than said each catalyst at a plurality of contact points. This allows providing a catalyst layer, a fuel cell membrane electrode assembly, and a fuel cell, each of which has compact size and excellent power generation performance, and a method for producing the same.Type: GrantFiled: May 3, 2010Date of Patent: May 26, 2015Assignees: OneD Material LLC, Sharp Kabushiki KaishaInventors: Masashi Muraoka, Kohtaroh Saitoh, Hirotaka Mizuhata, Takenori Onishi, Yimin Zhu, Ionel C. Stefan, Baixin Qian, Jay Goldman
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Patent number: 9006133Abstract: The present invention relates to electrochemical catalyst particles, including nanoparticles, which can be used membrane electrode assemblies and in fuel cells. In exemplary embodiments, the present invention provides electrochemical catalysts supported by various materials. Suitably the catalysts have an atomic ratio of oxygen to a metal in the nanoparticle of about 3 to about 6.Type: GrantFiled: October 22, 2009Date of Patent: April 14, 2015Assignees: OneD Material LLC, Sharp Kabushiki KaishaInventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan, Mutsuko Komoda, Hirotaka Mizuhata, Takenori Onishi
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Patent number: 8278011Abstract: The present invention relates to SiC nanostructures, including SiC nanopowder, SiC nanowires, and composites of SiC nanopowder and nanowires, which can be used as catalyst supports in membrane electrode assemblies and in fuel cells. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly.Type: GrantFiled: February 23, 2009Date of Patent: October 2, 2012Assignee: Nanosys, Inc.Inventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan
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Publication number: 20120021331Abstract: The present invention relates to SiC nanostructures, including SiC nanopowder, SiC nanowires, and composites of SiC nanopowder and nanowires, which can be used as catalyst supports in membrane electrode assemblies and in fuel cells. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly.Type: ApplicationFiled: February 23, 2009Publication date: January 26, 2012Applicant: NANOSYS, Inc.Inventors: Yimin ZHU, Jay L. GOLDMAN, Baixin QIAN, Ionel C. STEFAN
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Publication number: 20110275005Abstract: The present invention relates to interfacial layers for use m membrane electrode assemblies that comprise nanowire-supported catalysts, and fuel cells comprising such membrane electrode assemblies. The present invention also relates to methods of preparing membrane electrode assemblies and fuel cells comprising interfacial layers and nanowire-supported catalysts.Type: ApplicationFiled: October 22, 2009Publication date: November 10, 2011Applicant: Nanosys, IncInventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan, Masashi Muraoka, Takenori Onishi, Kohtaroh Saitoh, Hirotaka Mizuhata
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Publication number: 20110275011Abstract: The present invention relates to electrochemical catalyst particles, including nanoparticles, which can be used membrane electrode assemblies and in fuel cells. In exemplary embodiments, the present invention provides electrochemical catalysts supported by various materials. Suitably the catalysts have an atomic ratio of oxygen to a metal in the nanoparticle of about 3 to about 6.Type: ApplicationFiled: October 22, 2009Publication date: November 10, 2011Applicants: Sharp Kabushiki Kaisha, Nanosys, Inc.Inventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan, Mutsuko Komoda, Hirotaka Mizuhata, Takenori Onishi
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Publication number: 20110008707Abstract: A catalyst layer for a fuel cell membrane electrode assembly includes a plurality of agglomerates, adjacent ones of the plurality of agglomerates contacting with each other with pores provided between said adjacent ones of the plurality of agglomerates, each of the plurality of agglomerates being formed by packing a plurality of catalysts each consisting of noble metal fine particles supported on a fiber-like support material, adjacent ones of the plurality of catalysts contacting with each other with pores provided between said adjacent ones of the plurality of catalysts, and each of the plurality of catalysts contacting with a plurality of catalysts other than said each catalyst at a plurality of contact points. This allows providing a catalyst layer, a fuel cell membrane electrode assembly, and a fuel cell, each of which has compact size and excellent power generation performance, and a method for producing the same.Type: ApplicationFiled: May 3, 2010Publication date: January 13, 2011Applicants: NANOSYS, Inc., Sharp Kabushiki KaishaInventors: Masashi MURAOKA, Kohtaroh Saitoh, Hirotaka Mizuhata, Takenori Onishi, Yimin Zhu, Ionel C. Stefan, Baixin Qian, Jay L. Goldman
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Publication number: 20100297502Abstract: The present invention relates to nanostructured materials (including nanowires) for use in batteries. Exemplary materials include carbon-comprising, Si-based nanostructures, nanostructured materials disposed on carbon-based substrates, and nanostructures comprising nanoscale scaffolds. The present invention also provides methods of preparing battery electrodes, and batteries, using the nanostructured materials.Type: ApplicationFiled: May 19, 2010Publication date: November 25, 2010Applicant: NANOSYS, Inc.Inventors: Yimin ZHU, Jay L. GOLDMAN, Jason HARTLOVE, Hans Jurgen HOFLER, Baixin QIAN, Vijendra SAHI, Ionel C. STEFAN, David P. STUMBO
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Patent number: RE45703Abstract: The present invention relates to SiC nanostructures, including SiC nanopowder, SiC nanowires, and composites of SiC nanopowder and nanowires, which can be used as catalyst supports in membrane electrode assemblies and in fuel cells. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly.Type: GrantFiled: October 2, 2014Date of Patent: September 29, 2015Assignee: OneD Material LLCInventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan
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Patent number: RE46921Abstract: The present invention relates to SiC nanostructures, including SiC nanopowder, SiC nanowires, and composites of SiC nanopowder and nanowires, which can be used as catalyst supports in membrane electrode assemblies and in fuel cells. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly.Type: GrantFiled: September 28, 2015Date of Patent: June 26, 2018Assignee: OneD Material LLCInventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan
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Patent number: RE48084Abstract: The present invention relates to SiC nanostructures, including SiC nanopowder, SiC nanowires, and composites of SiC nanopowder and nanowires, which can be used as catalyst supports in membrane electrode assemblies and in fuel cells. The present invention also relates to composite catalyst supports comprising nanopowder and one or more inorganic nanowires for a membrane electrode assembly.Type: GrantFiled: June 25, 2018Date of Patent: July 7, 2020Assignee: ONED MATERIAL LLCInventors: Yimin Zhu, Jay L. Goldman, Baixin Qian, Ionel C. Stefan