Patents by Inventor Chengxiang Xiang
Chengxiang Xiang 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: 20240133051Abstract: Systems and methods for electrochemical hydrogen looping cells are described. Generating a pH swing can expedite carbon dioxide capture from oceanwater. Many embodiments implement electrochemical hydrogen looping cells that simultaneously produce acid via anodic hydrogen oxidation and base via cathodic hydrogen evolution to generate a pH change.Type: ApplicationFiled: October 10, 2023Publication date: April 25, 2024Applicants: California Institute of Technology, The Regents of the University of CaliforniaInventors: Harry A. Atwater, Zachary Schiffer, Chengxiang Xiang, Shane Ardo
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Publication number: 20240024823Abstract: Systems and methods for catalyzed asymmetric bipolar membranes are described. Catalyzed asymmetric bipolar membranes can sustain desired current densities under low operational voltage for prolonged time periods. Catalyzed asymmetric bipolar membranes can be implemented in electrodialysis cells for various applications such as carbon capture.Type: ApplicationFiled: June 28, 2023Publication date: January 25, 2024Applicant: California Institute of TechnologyInventors: Eowyn Lucas, Harry A. Atwater, Chengxiang Xiang
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Publication number: 20230107163Abstract: Systems and methods of gas-liquid contactors for direct ocean capture and/or direct air capture are described.Type: ApplicationFiled: September 20, 2022Publication date: April 6, 2023Applicants: California Institute of Technology, The Regents of the University of CaliforniaInventors: Chengxiang Xiang, Shane Ardo, Leanna Schulte, Harry A. Atwater, Zejie Chen, Anastasiya Bender, Ibadillah A. Digdaya
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Patent number: 11377747Abstract: A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.Type: GrantFiled: August 17, 2020Date of Patent: July 5, 2022Assignee: California Institute of TechnologyInventors: Chengxiang Xiang, Xinghao Zhou, Ke Sun, Ryan J. Jones, Nathan S. Lewis
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Publication number: 20220144673Abstract: Disclosed are electrochemical systems that include an electrodialyzer and a vapor-fed CO2 reduction (CO2R) cell to capture and convert CO2 from ocean water. The electrodialyzer includes a stack of bipolar membrane electrodialysis (BPMED) cells between end electrodes. The electrodialzyer incorporates monovalent cation exchange membranes (M-CEMs) that prevent the transfer of multivalent cations between adjacent cell compartments, allowing continuous recirculation of electrolytes and solutions, and thus providing a safer and more scaling-free electrodialysis system. In some embodiments, the electrodialyzer may be configured to replace the water-splitting reaction at end electrodes with one-electron, reversible redox couples in solution at the electrodes. As a result, in the entire electrodialyzer stack, there is no bond-making, bond-breaking reactions and there is no gas generation, which significantly simplifies the cell design and improves operational safety.Type: ApplicationFiled: November 9, 2021Publication date: May 12, 2022Inventors: Chengxiang Xiang, Harry A. Atwater, Ibadillah A. Digdaya
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Publication number: 20200378016Abstract: A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.Type: ApplicationFiled: August 17, 2020Publication date: December 3, 2020Inventors: Chengxiang Xiang, Xinghao Zhou, Ke Sun, Ryan J. Jones, Nathan S. Lewis
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Patent number: 10787749Abstract: A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.Type: GrantFiled: March 1, 2018Date of Patent: September 29, 2020Assignee: California Institute of TechnologyInventors: Chengxiang Xiang, Xinghao Zhou, Ke Sun, Ryan J. Jones, Nathan S. Lewis
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Patent number: 10598644Abstract: Various samples are generated on a substrate. The samples each includes or consists of one or more analytes. In some instances, the samples are generated through the use of gels or through vapor deposition techniques. The samples are used in an instrument for screening large numbers of analytes by locating the samples between a working electrode and a counter electrode assembly. The instrument also includes one or more light sources for illuminating each of the samples. The instrument is configured to measure the photocurrent formed through a sample as a result of the illumination of the sample.Type: GrantFiled: August 18, 2017Date of Patent: March 24, 2020Assignees: California Institute of Technology, The Regents of the University of CaliforniaInventors: John M. Gregoire, Jian Jin, Kevin S. Kan, Martin R. Marcin, Slobodan Mitrovic, Paul F. Newhouse, Santosh K. Suram, Chengxiang Xiang, Lan Zhou
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Publication number: 20190264338Abstract: A solar fuels generation system includes a first reactor that contains a first solution in which a charge carrier is reduced to a reduced charge carrier. The system also includes a second reactor that contains a second solution in which the reduced charge carrier reduces protons so as to generate hydrogen gas.Type: ApplicationFiled: February 26, 2019Publication date: August 29, 2019Inventors: Christoph D. Karp, Alec S. Ho, Xinghao Zhou, Chengxiang Xiang, Nathan S. Lewis
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Patent number: 10242806Abstract: The solar fuels generator includes an ionically conductive separator between a gaseous first phase and a second phase. A photoanode uses one or more components of the first phase to generate cations during operation of the solar fuels generator. A cation conduit is positioned provides a pathway along which the cations travel from the photoanode to the separator. The separator conducts the cations. A second solid cation conduit conducts the cations from the separator to a photocathode.Type: GrantFiled: May 17, 2018Date of Patent: March 26, 2019Assignee: THE CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Nathan S. Lewis, Joshua M. Spurgeon, William C. West, Chengxiang Xiang
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Publication number: 20180269003Abstract: The solar fuels generator includes an ionically conductive separator between a gaseous first phase and a second phase. A photoanode uses one or more components of the first phase to generate cations during operation of the solar fuels generator. A cation conduit is positioned provides a pathway along which the cations travel from the photoanode to the separator. The separator conducts the cations. A second solid cation conduit conducts the cations from the separator to a photocathode.Type: ApplicationFiled: May 17, 2018Publication date: September 20, 2018Inventors: Nathan S. Lewis, Joshua M. Spurgeon, William C. West, Chengxiang Xiang
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Publication number: 20180251903Abstract: A solar fuels generator includes an anolyte and a catholyte in contact with a separator. The separator is configured such that the pH of the anolyte and the pH of the catholyte are each held at a steady state pH level during operation of the solar fuels generator. The steady state pH level of the anolyte is different from the steady state pH level of the catholyte.Type: ApplicationFiled: March 1, 2018Publication date: September 6, 2018Inventors: Chengxiang Xiang, Xinghao Zhou, Ke Sun, Ryan J. Jones, Nathan S. Lewis
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Patent number: 10026560Abstract: The solar fuels generator includes an ionically conductive separator between a gaseous first phase and a second phase. A photoanode uses one or more components of the first phase to generate cations during operation of the solar fuels generator. A cation conduit is positioned provides a pathway along which the cations travel from the photoanode to the separator. The separator conducts the cations. A second solid cation conduit conducts the cations from the separator to a photocathode.Type: GrantFiled: July 22, 2013Date of Patent: July 17, 2018Assignee: THE CALIFORNIA INSTITUTE OF TECHNOLOGYInventors: Nathan S. Lewis, Joshua M. Sprugeon, William C. West, Chengxiang Xiang
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Publication number: 20180059078Abstract: Various samples are generated on a substrate. The samples each includes or consists of one or more analytes. In some instances, the samples are generated through the use of gels or through vapor deposition techniques. The samples are used in an instrument for screening large numbers of analytes by locating the samples between a working electrode and a counter electrode assembly. The instrument also includes one or more light sources for illuminating each of the samples. The instrument is configured to measure the photocurrent formed through a sample as a result of the illumination of the sample.Type: ApplicationFiled: August 18, 2017Publication date: March 1, 2018Inventors: John M. Gregoire, Jian Jin, Kevin S. Kan, Martin R. Marcin, Slobodan Mitrovic, Paul F. Newhouse, Santosh K. Suram, Chengxiang Xiang, Lan Zhou
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Patent number: 9778234Abstract: Various samples are generated on a substrate. The samples each includes or consists of one or more analytes. In some instances, the samples are generated through the use of gels or through vapor deposition techniques. The samples are used in an instrument for screening large numbers of analytes by locating the samples between a working electrode and a counter electrode assembly. The instrument also includes one or more light sources for illuminating each of the samples. The instrument is configured to measure the photocurrent formed through a sample as a result of the illumination of the sample.Type: GrantFiled: July 21, 2014Date of Patent: October 3, 2017Assignees: California Institute Of Technology, The Regents of the University of CaliforniaInventors: John M. Gregoire, Jian Jin, Kevin S. Kan, Martin R. Marcin, Slobodan Mitrovic, Paul F. Newhouse, Santosh K. Suram, Chengxiang Xiang, Lan Zhou
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Patent number: 9645108Abstract: Electrochemical experiments are performed on a collection of samples by suspending a drop of electrolyte solution between an electrochemical experiment probe and one of the samples that serves as a test sample. During the electrochemical experiment, the electrolyte solution is added to the drop and an output solution is removed from the drop. The probe and collection of samples can be moved relative to one another so the probe can be scanned across the samples.Type: GrantFiled: May 31, 2013Date of Patent: May 9, 2017Assignees: California Institute of Technology, Lawrence Berkeley National LaboratoryInventors: Jian Jin, Chengxiang Xiang, John Gregoire
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Patent number: 9645109Abstract: Electrochemical or electrochemical and photochemical experiments are performed on a collection of samples by suspending a drop of electrolyte solution between an electrochemical experiment probe and one of the samples that serves as a test sample. During the electrochemical experiment, the electrolyte solution is added to the drop and an output solution is removed from the drop. The probe and collection of samples can be moved relative to one another so the probe can be scanned across the samples.Type: GrantFiled: April 10, 2015Date of Patent: May 9, 2017Assignees: California Institute of Technology, Lawrence Berkeley National LaboratoryInventors: Jian Jin, Chengxiang Xiang, John M. Gregoire, Aniketa A. Shinde, Dan W. Guevarra, Ryan J. Jones, Martin R. Marcin, Slobodan Mitrovic
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Patent number: 9435043Abstract: An Oxygen Evolution Reaction (OER) catalyst includes a metal oxide that includes oxygen, cerium, and one or more second metals. In some instances, the cerium is 10 to 80 molar % of the metals in the metal oxide and/or the catalyst includes two or more second metals. The OER catalyst can be included in or on an electrode. The electrode can be arranged in an oxygen evolution system such that the Oxygen Evolution Reaction occurs at the electrode.Type: GrantFiled: December 12, 2014Date of Patent: September 6, 2016Assignees: California Institute of Technology, The Regents of the University of CaliforniaInventors: Joel A. Haber, Jian Jin, Chengxiang Xiang, John M. Gregoire, Ryan J. Jones, Dan W. Guevarra, Aniketa A. Shinde
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Publication number: 20150292095Abstract: An Oxygen Evolution Reaction (OER) catalyst includes a metal oxide that includes oxygen, cerium, and one or more second metals. In some instances, the cerium is 10 to 80 molar % of the metals in the metal oxide and/or the catalyst includes two or more second metals. The OER catalyst can be included in or on an electrode. The electrode can be arranged in an oxygen evolution system such that the Oxygen Evolution Reaction occurs at the electrode.Type: ApplicationFiled: December 12, 2014Publication date: October 15, 2015Inventors: Joel A. Haber, Jian Jin, Chengxiang Xiang, John M. Gregoire, Ryan J. Jones, Dan W. Guevarra, Aniketa A. Shinde
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Publication number: 20150212036Abstract: Electrochemical or electrochemical and photochemical experiments are performed on a collection of samples by suspending a drop of electrolyte solution between an electrochemical experiment probe and one of the samples that serves as a test sample. During the electrochemical experiment, the electrolyte solution is added to the drop and an output solution is removed from the drop. The probe and collection of samples can be moved relative to one another so the probe can be scanned across the samples.Type: ApplicationFiled: April 10, 2015Publication date: July 30, 2015Inventors: Jian Jin, Chengxiang Xiang, John M. Gregoire, Aniketa A. Shinde, Dan W. Guevarra, Ryan J. Jones, Martin R. Marcin, Slobodan Mitrovic