Patents by Inventor Eric D. Wachsman
Eric D. Wachsman 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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Publication number: 20160268631Abstract: The present invention is directed to solid NASICON electrolytes in which the zirconium site is doped with a 2+ oxidation state cation. The present invention is also directed to methods of making the solid electrolytes and methods of using the solid electrolytes in batteries and other electrochemical technologies.Type: ApplicationFiled: March 9, 2016Publication date: September 15, 2016Inventors: ERIC D. WACHSMAN, ADAM JOLLEY
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Patent number: 9343746Abstract: Embodiments of the invention are directed to SOFC with a multilayer structure comprising a porous ceramic cathode, optionally a cathodic triple phase boundary layer, a bilayer electrolyte comprising a cerium oxide comprising layer and a bismuth oxide comprising layer, an anion functional layer, and a porous ceramic anode with electrical interconnects, wherein the SOFC displays a very high power density at temperatures below 700° C. with hydrogen or hydrocarbon fuels. The low temperature conversion of chemical energy to electrical energy allows the fabrication of the fuel cells using stainless steel or other metal alloys rather than ceramic conductive oxides as the interconnects.Type: GrantFiled: October 14, 2009Date of Patent: May 17, 2016Assignee: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.Inventors: Eric D. Wachsman, Heesung Yoon, Kang Taek Lee, Matthew Camaratta, Jin Soo Ahn
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Publication number: 20160133979Abstract: A fuel cell anode comprises a porous ceramic molten metal composite of a metal or metal alloy, for example, tin or a tin alloy, infused in a ceramic where the metal is liquid at the temperatures of an operational solid oxide fuel cell, exhibiting high oxygen ion mobility. The anode can be employed in a SOFC with a thin electrolyte that can be a ceramic of the same or similar composition to that infused with the liquid metal of the porous ceramic molten metal composite anode. The thicknesses of the electrolyte can be reduced to a minimum that allows greater efficiencies of the SOFC thereby constructed.Type: ApplicationFiled: October 20, 2015Publication date: May 12, 2016Inventors: Eric D. Wachsman, Sean Robert Bishop
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Patent number: 9334195Abstract: The subject invention discloses a method for the preparation of a dual structure cellular ceramic object where a dispersion of a ceramic precursor a chain-growth or step-growth polymer precursor and a solvent is heated to a first temperature at a first rate followed by heating to a second temperature at a second rate and holding the temperature to form a sintered dual structure cellular ceramic object which is then cooled at a third rate to room temperature. The dual structure cellular ceramic object has a dense surface layer over at least a portion of the object that abruptly yet smoothly and continuously transitioning into a porous ceramic.Type: GrantFiled: October 20, 2010Date of Patent: May 10, 2016Assignees: UNIVERSITA DEGLI STUDI DI ROMA “TOR VERGATA”, UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.Inventors: Francesco Basoli, Silvia Licoccia, Eric D. Wachsman, Enrico Traversa
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Publication number: 20150253275Abstract: Electrode configurations for electric-field enhanced performance in catalysis and solid-state devices involving gases are provided. According to an embodiment, electric-field electrodes can be incorporated in devices such as gas sensors and fuel cells to shape an electric field provided with respect to sensing electrodes for the gas sensors and surfaces of the fuel cells. The shaped electric fields can alter surface dynamics, system thermodynamics, reaction kinetics, and adsorption/desorption processes. In one embodiment, ring-shaped electric-field electrodes can be provided around sensing electrodes of a planar gas sensor.Type: ApplicationFiled: May 18, 2015Publication date: September 10, 2015Inventors: Bryan M. BLACKBURN, Eric D. WACHSMAN, Frederick Martin VAN ASSCHE, IV
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Publication number: 20150249262Abstract: Solid electrolytes compositions, methods of making the solid electrolytes, and methods of using the solid electrolytes in batteries and other electrochemical technologies are disclosed. The method of producing a solid electrolyte comprises (a) ball milling Na2CO3, SiO2, NH4H2PO4, a zirconium source, and a dopant to produce a ball milled powder; (b) calcining the ball milled powder to produce a calcined powder; and (c) sintering the calcined powder to produce a solid electrolyte. The zirconium source for the solid electrolyte may be ZrO2. The dopant for the solid electrolyte may be AI2O3, Fe2O3, Sb2O3, Yb2O3, or Dy2O3.Type: ApplicationFiled: September 25, 2013Publication date: September 3, 2015Applicant: University of Marylnd, College ParkInventors: Eric D. Wachsman, Gregory Thomas Hitz, Kang Taek Lee
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Publication number: 20150241383Abstract: Embodiments of the subject invention relate to a gas sensor and method for sensing one or more gases. An embodiment incorporates an array of sensing electrodes maintained at similar or different temperatures, such that the sensitivity and species selectivity of the device can be fine tuned between different pairs of sensing electrodes. A specific embodiment pertains to a gas sensor array for monitoring combustion exhausts and/or chemical reaction byproducts. An embodiment of the subject device related to this invention operates at high temperatures and can withstand harsh chemical environments. Embodiments of the device are made on a single substrate. The devices can also be made on individual substrates and monitored individually as if they were part of an array on a single substrate. The device can incorporate sensing electrodes in the same environment, which allows the electrodes to be coplanar and, thus, keep manufacturing costs low.Type: ApplicationFiled: May 11, 2015Publication date: August 27, 2015Inventors: Bryan BLACKBURN, Eric D. WACHSMAN
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Patent number: 9034170Abstract: Electrode configurations for electric-field enhanced performance in catalysis and solid-state devices involving gases are provided. According to an embodiment, electric-field electrodes can be incorporated in devices such as gas sensors and fuel cells to shape an electric field provided with respect to sensing electrodes for the gas sensors and surfaces of the fuel cells. The shaped electric fields can alter surface dynamics, system thermodynamics, reaction kinetics, and adsorption/desorption processes. In one embodiment, ring-shaped electric-field electrodes can be provided around sensing electrodes of a planar gas sensor.Type: GrantFiled: December 12, 2008Date of Patent: May 19, 2015Assignee: University of Florida Research Foundation, Inc.Inventors: Bryan M. Blackburn, Eric D. Wachsman, Frederick Martin Van Assche, IV
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Patent number: 9027387Abstract: Embodiments of the subject invention relate to a gas sensor and method for sensing one or more gases. An embodiment incorporates an array of sensing electrodes maintained at similar or different temperatures, such that the sensitivity and species selectivity of the device can be fine tuned between different pairs of sensing electrodes. A specific embodiment pertains to a gas sensor array for monitoring combustion exhausts and/or chemical reaction byproducts. An embodiment of the subject device related to this invention operates at high temperatures and can withstand harsh chemical environments. Embodiments of the device are made on a single substrate. The devices can also be made on individual substrates and monitored individually as if they were part of an array on a single substrate. The device can incorporate sensing electrodes in the same environment, which allows the electrodes to be coplanar and, thus, keep manufacturing costs low.Type: GrantFiled: October 9, 2008Date of Patent: May 12, 2015Assignee: University of Florida Research Foundation, Inc.Inventors: Bryan M. Blackburn, Eric D. Wachsman
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Publication number: 20150028259Abstract: In one embodiment, a membrane of proton-electron conducting ceramics that is useful for the conversion of a hydrocarbon and steam to hydrogen has a porous support coated with a film of a Perovskite-type oxide. By including the Zr and M in the oxide in place of Ce, the stability can be improved while maintaining sufficient hydrogen flux for efficient generation of hydrogen. In this manner, the conversion can be carried out by performing steam methane reforming (SMR) and/or water-gas shift reactions (WGS) at high temperature, where the conversion of CO to CO2 and H2 is driven by the removal of H2 to give high conversions.Type: ApplicationFiled: September 30, 2014Publication date: January 29, 2015Inventors: ERIC D. WACHSMAN, HEE SUNG YOON, TAKKEUN OH, JIANLIN LI
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Publication number: 20140302420Abstract: Novel anode materials including various compositions of vanadium-doped strontium titanate (SVT), and various compositions of vanadium- and sodium-doped strontium niobate (SNNV) for low- or intermediate-temperature solid oxide fuel cell (SOFCs). These materials offer high conductivity achievable at intermediate and low temperatures and can be used as the structural support of the SOFC anode and/or as the conductive phase of an anode. A method of making a low- or intermediate-temperature SOFC having an anode layer including SVT or SNNV is also provided.Type: ApplicationFiled: March 12, 2014Publication date: October 9, 2014Applicant: University of Maryland, College ParkInventors: Eric D. WACHSMAN, Ke-Ji PAN, Colin GORE, Mohammed Hussain Abdul JABBAR, Hee Sung YOON
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Patent number: 8845768Abstract: In one embodiment, a membrane of proton-electron conducting ceramics that is useful for the conversion of a hydrocarbon and steam to hydrogen has a porous support of M?-Sr1-z?M?z?Ce1-x?-y?Zrx?M??y?O3-?, Al2O3, mullite, ZrO2, CeO2 or any mixtures thereof where: M? is Ni, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, W, Zn, Pt, Ru, Rh, Pd, alloys thereof or mixtures thereof; M? is Ba, Ca, Mg, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, or Yb; M?? is Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, W, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, or Yb; z? is 0 to about 0.5; x? is 0 to about 0.5; y? is 0 to about 0.5; and x?+y?>0; for example, Ni—SrCe1-x?Zrx?O3-?, where x? is about 0.1 to about 0.3. The porous support is coated with a film of a Perovskite-type oxide of the formula SrCe1-x-yZrxMyO3-? where M is at least one of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, W, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb, x is 0 to about 0.15 and y is about 0.1 to about 0.3.Type: GrantFiled: June 10, 2009Date of Patent: September 30, 2014Assignee: University of Florida Research Foundation, Inc.Inventors: Eric D. Wachsman, Heesung Yoon, Takkeun Oh, Jianlin Li
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Publication number: 20140287305Abstract: Solid-state, ion-conducting batteries with an ion-conducting, solid-state electrolyte. The solid-state electrolyte has at least one porous region (e.g., porous layer) and a dense region (e.g., dense layer). The batteries are, for example, lithium-ion, sodium-ion, or magnesium-ion conducting solid-state batteries. The ion-conducting, solid-state electrolyte is, for example, a lithium-garnet material.Type: ApplicationFiled: March 21, 2014Publication date: September 25, 2014Inventors: Eric D. Wachsman, Liangbing Hu, Venkataraman Thangadurai
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Publication number: 20140272665Abstract: Ceramic fuel cells having enhanced flatness and strength are disclosed. The fuel cell can include a half-cell having, in order, a patterned layer, an anode support layer and an electrolyte layer. Methods of making ceramic fuel cells are also provided.Type: ApplicationFiled: March 12, 2014Publication date: September 18, 2014Applicants: Redox Power Systems, LLC, University of Maryland, College ParkInventors: Hee Sung YOON, Eric D. WACHSMAN, Bryan M. BLACKBURN
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Patent number: 8613848Abstract: A device for the concurrent oxygen generation and control of carbon dioxide for life support system involves two stages, where a first stage removes CO2 from an exhalent side of a ventilation loop and a second stage employs Ceramic Oxygen Generators (COGs) to convert CO2 into carbon and O2. The first stage includes a plurality of chambers and means to switch the ventilation loop through at least one of the chambers, where CO2 removal is carried out before discharge of the CO2 depleted gas to an inhalant side of the ventilation loop, and to exclude the ventilation loop from the remaining chambers of the first stage, where these chambers are placed in communication with the second stage. The second stage has two portions separated by the COGs such that CO2 and the formed carbon remain on an intake portion from the O2 rich atmosphere on the exhaust side, which is plumbed via a metering valve to introduce the O2 rich atmosphere to the inhalant side of the ventilation loop.Type: GrantFiled: April 30, 2008Date of Patent: December 24, 2013Assignee: University of Florida Research Foundation, Inc.Inventors: Eric D. Wachsman, Keith L. Duncan, Helena Hagelin-Weaver
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Publication number: 20120231366Abstract: A fuel cell anode comprises a porous ceramic molten metal composite of a metal or metal alloy, for example, tin or a tin alloy, infused in a ceramic where the metal is liquid at the temperatures of an operational solid oxide fuel cell, exhibiting high oxygen ion mobility. The anode can be employed in a SOFC with a thin electrolyte that can be a ceramic of the same or similar composition to that infused with the liquid metal of the porous ceramic molten metal composite anode. The thicknesses of the electrolyte can be reduced to a minimum that allows greater efficiencies of the SOFC thereby constructed.Type: ApplicationFiled: March 9, 2012Publication date: September 13, 2012Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.Inventors: ERIC D. WACHSMAN, Sean Robert Bishop
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Publication number: 20120225270Abstract: The subject invention discloses a method for the preparation of a dual structure cellular ceramic object where a dispersion of a ceramic precursor a chain-growth or step-growth polymer precursor and a solvent is heated to a first temperature at a first rate followed by heating to a second temperature at a second rate and holding the temperature to form a sintered dual structure cellular ceramic object which is then cooled at a third rate to room temperature. The dual structure cellular ceramic object has a dense surface layer over at least a portion of the object that abruptly yet smoothly and continuously transitioning into a porous ceramic.Type: ApplicationFiled: October 20, 2010Publication date: September 6, 2012Applicants: UNIVERSITA DEGLI STUDI DE ROMA "TOR VERGATA", UNIVERSITY OF FLORIDA RESEARCH FOUNDATION INC.Inventors: Francesco Basoli, Silvia Licoccia, Eric D. Wachsman, Enrico Traversa
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Publication number: 20110200910Abstract: Embodiments of the invention are directed to SOFC with a multilayer structure comprising a porous ceramic cathode, optionally a cathodic triple phase boundary layer, a bilayer electrolyte comprising a cerium oxide comprising layer and a bismuth oxide comprising layer, an anion functional layer, and a porous ceramic anode with electrical interconnects, wherein the SOFC displays a very high power density at temperatures below 700° C. with hydrogen or hydrocarbon fuels. The low temperature conversion of chemical energy to electrical energy allows the fabrication of the fuel cells using stainless steel or other metal alloys rather than ceramic conductive oxides as the interconnects.Type: ApplicationFiled: October 14, 2009Publication date: August 18, 2011Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION INC.Inventors: Eric D. Wachsman, Heesung Yoon, Kang Taek Lee, Matthew Camaratta, Jin Soo Ahn
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Publication number: 20110084237Abstract: In one embodiment, a membrane of proton-electron conducting ceramics that is useful for the conversion of a hydrocarbon and steam to hydrogen has a porous support of M?-Sr1-z?M?z?Ce1-x?-y?Zrx?M??y?O3-?, Al2O3, mullite, ZrO2, CeO2 or any mixtures thereof where: M? is Ni, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, W, Zn, Pt, Ru, Rh, Pd, alloys thereof or mixtures thereof; M? is Ba, Ca, Mg, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, or Yb; M?? is Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, W, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, or Yb; z? is 0 to about 0.5; x? is 0 to about 0.5; y? is 0 to about 0.5; and x?+y?>0; for example, Ni—SrCe1-x?Zrx?O3-?, where x? is about 0.1 to about 0.3. The porous support is coated with a film of a Perovskite-type oxide of the formula SrCe1-x-yZrxMyO3-? where M is at least one of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Nb, Mo, W, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb, x is 0 to about 0.15 and y is about 0.1 to about 0.3.Type: ApplicationFiled: June 10, 2009Publication date: April 14, 2011Applicant: University of Florida Research Foundation Inc.Inventors: Eric D. Wachsman, Heesung Yoon, Takkeun Oh, Jianlin Li
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Publication number: 20100323258Abstract: Electrode configurations for electric-field enhanced performance in catalysis and solid-state devices involving gases are provided. According to an embodiment, electric-field electrodes can be incorporated in devices such as gas sensors and fuel cells to shape an electric field provided with respect to sensing electrodes for the gas sensors and surfaces of the fuel cells. The shaped electric fields can alter surface dynamics, system thermodynamics, reaction kinetics, and adsorption/desorption processes. In one embodiment, ring-shaped electric-field electrodes can be provided around sensing electrodes of a planar gas sensor.Type: ApplicationFiled: December 12, 2008Publication date: December 23, 2010Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.Inventors: Bryan M. Blackburn, Eric D. Wachsman, Frederick Martin Van Assche