Patents by Inventor Richard K. Holman
Richard K. Holman 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: 7988746Abstract: An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.Type: GrantFiled: September 20, 2010Date of Patent: August 2, 2011Assignees: A123 Systems, Inc., Massachusetts Institute of TechnologyInventors: Yet-Ming Chiang, William D. Moorehead, Antoni S. Gozdz, Richard K. Holman, Andrew L. Loxley, Gilbert N. Riley, Jr., Michael S. Viola
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Publication number: 20110027656Abstract: Methods are provided for making bipolar electrochemical devices, such as batteries, using electrophoresis. A bipolar device is assembled by applying a field that creates a physical separation between two active electrode materials, without requiring insertion of a discrete separator film or electrolyte layer.Type: ApplicationFiled: January 22, 2010Publication date: February 3, 2011Applicants: Massachusetts Institute of Technology, A123 Systems, Inc.Inventors: Yet-Ming Chiang, Benjamin Hellweg, Richard K. Holman, Steven M. Tobias, Dong-Wan Kim, Ryan Craig Wartena
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Publication number: 20110005065Abstract: An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.Type: ApplicationFiled: September 20, 2010Publication date: January 13, 2011Inventors: Yet-Ming CHIANG, William Douglas MOOREHEAD, Antoni S. GOZDZ, Richard K. HOLMAN, Andrew LOXLEY, Gilberg N. RILEY, JR., Michael S. VIOLA
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Publication number: 20100323244Abstract: This disclosure relates to compositions and methods of manufacture of electrodes for batteries, including rechargeable lithium batteries, wherein at least one electrode comprises an electroactive material and a malleable metal. The electrode may be substantially free of other conductive additives and organic binders. Manufacture of the electrode may be performed without solvent or sintering.Type: ApplicationFiled: June 23, 2010Publication date: December 23, 2010Applicant: A123 Systems, Inc.Inventors: Yet-Ming CHIANG, Shen J. DILLON, Richard K. HOLMAN
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Patent number: 7662265Abstract: Methods are provided for making bipolar electrochemical devices, such as batteries, using electrophoresis. A bipolar device is assembled by applying a field that creates a physical separation between two active electrode materials, without requiring insertion of a discrete separator film or electrolyte layer.Type: GrantFiled: April 18, 2005Date of Patent: February 16, 2010Assignees: Massachusetts Institute of Technology, A123 Systems, Inc.Inventors: Yet-Ming Chiang, Benjamin Hellweg, Richard K. Holman, Steven M. Tobias, Dong-Wan Kim, Ryan Craig Wartena
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Publication number: 20100003603Abstract: An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.Type: ApplicationFiled: July 30, 2009Publication date: January 7, 2010Inventors: Yet-Ming CHIANG, William Douglas MOOREHEAD, Antoni S. GOZDZ, Richard K. HOLMAN, Andrew LOXLEY, Gilberg N. RILEY, JR., Michael S. VIOLA
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Patent number: 7579112Abstract: An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.Type: GrantFiled: July 26, 2002Date of Patent: August 25, 2009Assignees: A123 Systems, Inc., Massachusetts Institute of TechnologyInventors: Yet Ming Chiang, William Douglas Moorehead, Antoni S. Gozdz, Richard K. Holman, Andrew Loxley, Gilbert N. Riley, Jr., Michael S. Viola
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Publication number: 20090029261Abstract: Porous separators for use in electrochemical cells and methods of their manufacture are provided. The separators are porous structures comprising an electroactive material and an electronically insulating structural material, wherein the electroactive material forms a percolating path in the separator.Type: ApplicationFiled: June 2, 2008Publication date: January 29, 2009Applicant: A123 SYSTEMS, INC.Inventors: Karen E. THOMAS-ALYEA, Susan J. BABINEC, Richard K. HOLMAN
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Publication number: 20080311470Abstract: An electrochemical device includes a first electrode in electrical communication with a first current collector, a second electrode in electrical communication with a second current collector and a crosslinked solid polymer in contact with the first and second electrodes. At least one of the first and second electrodes includes a network of electrically connected particles comprising an electroactive material, and the particles of one electrode exert a repelling force on the other electrode when the first and second electrodes are combined with an uncrosslinked precursor to the solid polymer.Type: ApplicationFiled: June 16, 2008Publication date: December 18, 2008Applicant: A123 SYSTEMS, INC.Inventors: Antoni S. GOZDZ, Richard K. HOLMAN, Andrew L. LOXLEY, Ronnie WILKINS
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Publication number: 20080248375Abstract: Secondary batteries having fast charge times are provided. In some implementations, the cathode includes LiFePO4 as an active material. In some implementations, the batteries include carbon-based anodes.Type: ApplicationFiled: July 11, 2007Publication date: October 9, 2008Inventors: George M. Cintra, Alexander Kaplan, Matthew R. Stone, Kirakodu S. Nanjundaswamy, Richard K. Holman, Frank Kressmann, Harmut Loth-Krausser
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Publication number: 20080199764Abstract: A lithium secondary cell includes a plurality of stacked layers. Each stacked layer includes a lithium-containing positive electrode in electronic contact with a positive electrode current collector, a negative electrode in electronic contact with a negative electrode current collector, a separator positioned between the positive electrode and the negative electrode, and an electrolyte in ionic contact with the positive and negative electrodes. The positive current collector is in electrical connection with an external circuit and has a total thickness of at least about 200 ?m. The negative current collector is in electrical connection with an external circuit. The total cell polarization during a failure event reduces the rate of discharge such that catastrophic failure does not occur. Thus, the lithium secondary cell exhibits safer failure modes than conventional cells known in the art.Type: ApplicationFiled: April 20, 2006Publication date: August 21, 2008Inventors: Richard K. Holman, Andrew L. Loxley
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Patent number: 7387851Abstract: An electrochemical device includes a first electrode in electrical communication with a first current collector, a second electrode in electrical communication with a second current collector and a crosslinked solid polymer in contact with the first and second electrodes. At least one of the first and second electrodes includes a network of electrically connected particles comprising an electroactive material, and the particles of one electrode exert a repelling force on the other electrode when the first and second electrodes are combined with an uncrosslinked precursor to the solid polymer.Type: GrantFiled: January 30, 2003Date of Patent: June 17, 2008Assignee: A123 Systems, Inc.Inventors: Antoni S. Gozdz, Richard K. Holman, Andrew L. Loxley, Ronnie Wilkins
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Patent number: 7087348Abstract: Electrodes for use in electrochemical devices are disclosed. More particularly coated electrode particles for use in solid electrochemical cells and materials and systems for improving electronic conductivity and repulsive force characteristics of an electrode network are disclosed. An article containing a plurality of distinct first particles that form an electrode network in which the distinct first particles are coated with a system of electrically conductive material is also disclosed. In some embodiments, the coating layer also includes a low refractive index material. In some embodiments, the coating layer of the electroactive material includes a plurality of second particles.Type: GrantFiled: January 30, 2003Date of Patent: August 8, 2006Assignee: A123 Systems, Inc.Inventors: Richard K. Holman, Yet Ming Chiang, Antoni S. Gozdz, Andrew L. Loxley, Benjamin Nunes, Michele Ostraat, Gilbert N. Riley, Michael S. Viola
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Publication number: 20040018430Abstract: The present invention relates generally to electrodes for use in electrochemical devices, and more particularly, to coated electrode particles for use in solid electrochemical cells, and to materials and systems for improving electronic conductivity and repulsive force characteristics of an electrode network. The present invention also relates to an article comprising a plurality of electroactive particles that form an electrode network wherein the electroactive particles are coated with a system of electrically conductive and low refractive index materials.Type: ApplicationFiled: January 30, 2003Publication date: January 29, 2004Applicant: A123 Systems, Inc.Inventors: Richard K. Holman, Yet-Ming Chiang, Antoni S. Gozdz, Andrew Loxley, Benjamin Nunes, Michele Ostraat, Gilbert N. Riley, Michael S. Viola
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Publication number: 20040018431Abstract: An electrochemical device includes a first electrode in electrical communication with a first current collector, a second electrode in electrical communication with a second current collector and a crosslinked solid polymer in contact with the first and second electrodes. At least one of the first and second electrodes includes a network of electrically connected particles comprising an electroactive material, and the particles of one electrode exert a repelling force on the other electrode when the first and second electrodes are combined with an uncrosslinked precursor to the solid polymer.Type: ApplicationFiled: January 30, 2003Publication date: January 29, 2004Applicant: A123 Systems, Inc.Inventors: Antoni S. Gozdz, Richard K. Holman, Andrew Loxley, Ronnie Wilkins
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Publication number: 20030099884Abstract: An energy storage device includes a first electrode comprising a first material and a second electrode comprising a second material, at least a portion of the first and second materials forming an interpenetrating network when dispersed in an electrolyte, the electrolyte, the first material and the second material are selected so that the first and second materials exert a repelling force on each other when combined. An electrochemical device, includes a first electrode in electrical communication with a first current collector; a second electrode in electrical communication with a second current collector; and an ionically conductive medium in ionic contact with said first and second electrodes, wherein at least a portion of the first and second electrodes form an interpenetrating network and wherein at least one of the first and second electrodes comprises an electrode structure providing two or more pathways to its current collector.Type: ApplicationFiled: July 26, 2002Publication date: May 29, 2003Applicant: A123SYSTEMS, INC.Inventors: Yet Ming Chiang, William Douglas Moorehead, Antoni S. Gozdz, Richard K. Holman, Andrew Loxley, Gilbert N. Riley, Michael S. Viola