Patents by Inventor Daniel J. Lisi
Daniel J. Lisi 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: 9385379Abstract: A bipolar plate for a fuel cell is provided including a plate having an active surface with a plurality of flow channels formed therein. The plurality of flow channels have a hydrophilic coating deposited thereon and define a plurality of lands disposed therebetween. The plurality of lands is substantially free of the hydrophilic coating. Furthermore, a thickness of the hydrophilic coating is substantially constant along a length of the active surface and an edge of the hydrophilic coating adjacent the plurality of lands is substantially continuous. A method for preparing the bipolar plate is also provided.Type: GrantFiled: August 27, 2013Date of Patent: July 5, 2016Assignee: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Richard H. Blunk, Daniel J. Lisi
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Patent number: 8735016Abstract: In at least one embodiment, the present invention provides a hydrophilic electrically conductive fluid distribution plate and a method of making, and system for using, the hydrophilic electrically conductive fluid distribution plate. In at least one embodiment, the plate comprises a plate body defining a set of fluid flow channels configured to distribute flow of a fluid across at least one side of the plate, and a composite conductive coating having a water contact angle of less than 40° adhered to the plate body. In at least one embodiment, the composite coating comprises a polymeric conductive layer adhered to the plate body having an exterior surface, and a particulate carbon layer adhered to the exterior surface of the polymeric conductive layer.Type: GrantFiled: May 12, 2005Date of Patent: May 27, 2014Assignee: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Gayatri Vyas, Feng Zhong, Richard H. Blunk, Daniel J. Lisi, Michael K. Budinski, Gerald W. Fly, Timothy J. Fuller, Brian K. Brady, Keith E. Newman
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Patent number: 8623573Abstract: In at least one embodiment, the present invention provides an electrically conductive fluid distribution plate and a method of making, and system for using, the electrically conductive fluid distribution plate. In at least one embodiment, the plate comprises a plate body defining a set of fluid flow channels configured to distribute flow of a fluid across at least one side of the plate, and a polymeric porous conductive layer proximate the plate body, with the porous conductive layer having a porosity sufficient to result in a water contact angle of the surface of less than 40°.Type: GrantFiled: May 12, 2005Date of Patent: January 7, 2014Assignee: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Feng Zhong, Richard H. Blunk, Youssef M. Mikhail, Gayatri Vyas, Daniel J. Lisi, Michael K. Budinski, Gerald W. Fly, Timothy J. Fuller, Brian K. Brady, Keith E. Newman
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Publication number: 20130344420Abstract: A bipolar plate for a fuel cell is provided including a plate having an active surface with a plurality of flow channels formed therein. The plurality of flow channels have a hydrophilic coating deposited thereon and define a plurality of lands disposed therebetween. The plurality of lands is substantially free of the hydrophilic coating. Furthermore, a thickness of the hydrophilic coating is substantially constant along a length of the active surface and an edge of the hydrophilic coating adjacent the plurality of lands is substantially continuous. A method for preparing the bipolar plate is also provided.Type: ApplicationFiled: August 27, 2013Publication date: December 26, 2013Applicant: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Richard H. Blunk, Daniel J. Lisi
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Patent number: 8563075Abstract: A bipolar plate for a fuel cell is provided including a plate having an active surface with a plurality of flow channels formed therein. The plurality of flow channels have a hydrophilic coating deposited thereon and define a plurality of lands disposed therebetween. The plurality of lands is substantially free of the hydrophilic coating. Furthermore, a thickness of the hydrophilic coating is substantially constant along a length of the active surface and an edge of the hydrophilic coating adjacent the plurality of lands is substantially continuous. A method for preparing the bipolar plate is also provided.Type: GrantFiled: April 4, 2007Date of Patent: October 22, 2013Assignee: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Richard H. Blunk, Daniel J. Lisi
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Patent number: 8084164Abstract: In at least one embodiment, the present invention provides an electrically conductive fluid distribution separator plate assembly, a method of making, and a system for using, the electrically conductive fluid distribution separator plate assembly. In at least one embodiment, the electrically conductive fluid distribution separator plate assembly comprises a metallic cathode plate having opposed surfaces and a first contact resistance, a polymeric composite anode plate adjacent to the metallic cathode plate, and a low contact resistance coating located on at least one of the surfaces of the plates, with the coating having a second contact resistance, less than the first contact resistance.Type: GrantFiled: January 10, 2011Date of Patent: December 27, 2011Assignee: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Richard H. Blunk, John N. Owens, Daniel J. Lisi, Gayatri Vyas
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Publication number: 20110254198Abstract: Devices comprising an electrochemical conversion assembly comprise a plurality of electrochemical conversion cells, and a plurality of electrically conductive bipolar plates, wherein the electrochemical conversion cells are disposed between the adjacent bipolar plates. The electrochemical conversion assembly further comprises a plurality of conversion assembly gaskets, wherein the respective conversion assembly gaskets are molded onto corresponding ones of the plurality of bipolar plates. The conversion assembly gaskets comprise a mixture including polyvinylidene fluoride (PVDF).Type: ApplicationFiled: June 23, 2011Publication date: October 20, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Daniel J. Lisi, Gayatri Vyas
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Patent number: 7972449Abstract: A metal composite for use in electrochemical devices is disclosed. The metal composite comprises a stainless steel interior component and a deposited nitrided metal exterior layer, wherein the nitrided exterior layer has lower electric contact resistance and greater corrosion resistance than the stainless steel interior component. A bipolar plate made of such metal composite and methods of producing the metal composite and bipolar plate are also disclosed.Type: GrantFiled: January 3, 2008Date of Patent: July 5, 2011Assignee: GM Global Technology Operations LLCInventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Gayatri Vyas Dadheech, Feng Zhong, Richard H. Blunk, Daniel J. Lisi
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Patent number: 7883819Abstract: In at least one embodiment, the present invention provides an electrically conductive fluid distribution separator plate assembly, a method of making, and a system for using, the electrically conductive fluid distribution separator plate assembly. In at least one embodiment, the electrically conductive fluid distribution separator plate assembly comprises a metallic cathode plate having opposed surfaces and a first contact resistance, a polymeric composite anode plate adjacent to the metallic cathode plate, and a low contact resistance coating located on at least one of the surfaces of the plates, with the coating having a second contact resistance, less-than the first contact resistance.Type: GrantFiled: August 30, 2005Date of Patent: February 8, 2011Assignee: GM Global Technologies Operations, Inc.Inventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Richard H. Blunk, John N. Owens, Daniel J. Lisi, Gayatri Vyas
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Patent number: 7700212Abstract: An enhanced stability and inexpensive bipolar plate for a fuel cell is disclosed. The enhanced stability bipolar plate includes a bipolar plate substrate and a corrosion-resistant coating thermally sprayed on the bipolar plate substrate. A method for enhancing corrosion resistance of a bipolar plate is also disclosed.Type: GrantFiled: October 7, 2004Date of Patent: April 20, 2010Assignee: GM Global Technology Operations, Inc.Inventors: Mahmoud H. Abd Elhamid, Gayatri Vyas, Youssef M. Mikhail, Richard H. Blunk, Daniel J. Lisi
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Publication number: 20090176142Abstract: A metal composite for use in electrochemical devices is disclosed. The metal composite comprises a stainless steel interior component and a deposited nitrided metal exterior layer, wherein the nitrided exterior layer has lower electric contact resistance and greater corrosion resistance than the stainless steel interior component. A bipolar plate made of such metal composite and methods of producing the metal composite and bipolar plate are also disclosed.Type: ApplicationFiled: January 3, 2008Publication date: July 9, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Gayatri Vyas Dadheech, Feng Zhong, Richard H. Blunk, Daniel J. Lisi
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Publication number: 20080248370Abstract: A bipolar plate for a fuel cell is provided including a plate having an active surface with a plurality of flow channels formed therein. The plurality of flow channels have a hydrophilic coating deposited thereon and define a plurality of lands disposed therebetween. The plurality of lands is substantially free of the hydrophilic coating. Furthermore, a thickness of the hydrophilic coating is substantially constant along a length of the active surface and an edge of the hydrophilic coating adjacent the plurality of lands is substantially continuous. A method for preparing the bipolar plate is also provided.Type: ApplicationFiled: April 4, 2007Publication date: October 9, 2008Inventors: Mahmoud H. Abd Elhamid, Richard H. Blunk, Daniel J. Lisi
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Patent number: 7285353Abstract: A composite separator plate for use in a fuel cell stack and method of manufacture is provided. The composite separator plate includes a plurality of elongated support members oriented generally parallel to each other and a polymeric body portion formed around the support members. The body portion includes a first surface with a plurality of flow channels and a second surface opposite the first surface. A plurality of electrically conductive fibers are disposed within the polymeric body portion, each fiber extending continuously from the first surface of the polymeric body portion to the second surface of the polymeric body portion in a through plane configuration.Type: GrantFiled: October 8, 2004Date of Patent: October 23, 2007Assignee: General Motors CorporationInventors: Daniel J Lisi, Richard H Blunk, Mahmoud M Abd Elhamid, Youssef M Mikhail
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Patent number: 7261963Abstract: Embodiments of an electrically conductive fluid distribution plate are provided, wherein the electrically conductive fluid distribution plate comprises a plate body defining a set of fluid flow channels configured to distribute flow of a fluid across at least one side of said plate, and a coating adhered to the plate in an area of the plate including the fluid flow channels defined by the plate body. The coating comprises expanded graphite comprising less than about 0.01% by weight of impurities. The coating also comprises less than about 10% by weight expanded graphite plus carbon black, and about 70% to about 95% by wt. binder, wherein the binder is comprised of a polymeric resin.Type: GrantFiled: November 12, 2002Date of Patent: August 28, 2007Assignee: General Motors CorporationInventors: Mahmoud H. Abd Elhamid, Youssef Mikhail, Richard H. Blunk, Daniel J. Lisi
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Patent number: 7195836Abstract: A separator plate in an electrochemical cell and method for making the same includes a body with an electrically conductive first section having fluid flow fields with a plurality of flow channels formed therein. A second section is provided adjacent to the first section that has a header area defining a manifold that supplies fluids to the flow fields of each fuel cell. The second section is non-conductive to prevent possible electrical interaction with any aqueous fluids of finite ionic conductivity present in the fuel cell, which may result in inefficient fuel cell operations.Type: GrantFiled: March 7, 2003Date of Patent: March 27, 2007Assignee: General Motors CorporationInventors: Daniel J Lisi, Richard H Blunk, John N Owens, Youssef M Mikhail, Mahmoud H Abd Elhamid
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Patent number: 6942941Abstract: The present invention relates to an electrically conductive element (e.g. bipolar plate) for a fuel cell which has an improved adhesive bond. The conductive element generally comprises a first and a second conductive sheet, each having a surface that confront one another. The surfaces that confront one another are overlaid with an electrically conductive primer coating providing corrosion protection and low contact resistance to said first and said second sheets respectively in regions where the first and second sheets contact one another. The first and said second coated surfaces are joined to one another by an electrically conductive adhesive which provides adhesion of said first and said second coated surfaces of said sheets at the contact region. Further, the present invention contemplates methods to form such an improved bond in an electrically conductive element.Type: GrantFiled: August 6, 2003Date of Patent: September 13, 2005Assignee: General Motors CorporationInventors: Richard H. Blunk, Mahmoud H. Abd Elhamid, Daniel J. Lisi, Youssef M. Mikhail, Michael K. Budinski
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Patent number: 6887610Abstract: A bipolar plate assembly for a proton exchange membrane fuel cell stack advantageously connects electrically conductive plate surfaces, without the requirement to weld or braze the plate pairs. Each plate has alternating coolant channels and lands formed on an inside facing surface. An electrically conductive layer is deposited over at least the coolant channels and lands. Pairs of plates are aligned having facing electrically conductive layers. A fluid seal is disposed between the inside facing surfaces about a perimeter of the coolant channels. Each plate pair is compressed to form a plurality of electrical bond lines between adjacent lands within the perimeter seal. The perimeter seal prevents stack reactant gas oxygen from contacting and oxidizing the electrically conductive layer. A dielectric coolant is also used to reduce oxidation of the electrically conductive layer.Type: GrantFiled: January 21, 2003Date of Patent: May 3, 2005Assignee: General Motors CorporationInventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Richard H. Blunk, Daniel J. Lisi
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Patent number: 6827747Abstract: A composite separator plate for use in a fuel cell stack and method of manufacture is provided. The composite separator plate includes a plurality of elongated support members oriented generally parallel to each other and a polymeric body portion formed around the support members. The body portion includes a first surface with a plurality of flow channels and a second surface opposite the first surface. A plurality of electrically conductive fibers are disposed within the polymeric body portion, each fiber extending continuously from the first surface of the polymeric body portion to the second surface of the polymeric body portion in a through plane configuration.Type: GrantFiled: February 11, 2002Date of Patent: December 7, 2004Assignee: General Motors CorporationInventors: Daniel J. Lisi, Richard H. Blunk, Mahmoud H. Abd Elhamid, Youssef M. Mikhail
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Publication number: 20040175608Abstract: The present invention relates to a separator plate in an electrochemical cell having a body with an electrically conductive first section having fluid flow fields with a plurality of flow channels formed therein and a second section adjacent to the first section that has a header area defining a manifold that supplies fluids to the flow fields of each fuel cell. The second section is non-conductive to prevent possible electrical interaction with any aqueous fluids of finite ionic conductivity present in the fuel cell, which may result in inefficient fuel cell operations. Further, the present invention contemplates methods to form such a separator plate.Type: ApplicationFiled: March 7, 2003Publication date: September 9, 2004Inventors: Daniel J. Lisi, Richard H. Blunk, John N. Owens, Youssef M. Mikhail, Mahmoud H. Abd Elhamid
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Publication number: 20040142224Abstract: A bipolar plate assembly for a proton exchange membrane fuel cell stack advantageously connects electrically conductive plate surfaces, without the requirement to weld or braze the plate pairs. Each plate has alternating coolant channels and lands formed on an inside facing surface. An electrically conductive layer is deposited over at least the coolant channels and lands. Pairs of plates are aligned having facing electrically conductive layers. A fluid seal is disposed between the inside facing surfaces about a perimeter of the coolant channels. Each plate pair is compressed to form a plurality of electrical bond lines between adjacent lands within the perimeter seal. The perimeter seal prevents stack reactant gas oxygen from contacting and oxidizing the electrically conductive layer. A dielectric coolant is also used to reduce oxidation of the electrically conductive layer.Type: ApplicationFiled: January 21, 2003Publication date: July 22, 2004Inventors: Mahmoud H. Abd Elhamid, Youssef M. Mikhail, Richard H. Blunk, Daniel J. Lisi