Patents by Inventor Charly David AZRA
Charly David AZRA 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: 20250062365Abstract: Substrates for producing oxygen electrodes, oxygen electrodes, electrochemical devices and productions methods are provided. Substrates include an intermediate microporous layer (MPL) attached to a porous transport layer (PTL) to interface between the PTL and the catalytic layer deposited on the MPL—to provide microstructure compatibility, improved adhesion and better performance of the oxygen electrode produced therefrom. The MPL corresponds to the PTL with respect to the types of metallic material, to provide good electric conductivity, while the metal particle sizes of the MPL are selected to modify the pore sizes of the PTL to reach a predefined pore size distribution of the substrate—which best supports printing, adhesion and performance of the catalyst layer on the substrate. Electrochemical devices such as fuel cells, electrolyzers and reversible devices may include the oxygen electrodes, which may be optimized for the specific application.Type: ApplicationFiled: August 6, 2024Publication date: February 20, 2025Applicant: HYDROLITE LTDInventors: Anna KITAYEV, Ervin TAL-GUTELMACHER, Charly David AZRA, Viktoria SMIRNOVA
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Publication number: 20240317952Abstract: Methods of preparing reinforced anion exchange membranes are provided, as well as produced membranes and corresponding devices utilizing the membranes. Methods comprise compounding a halide-functionalized polymer (selected to react with amines to yield anion-conducting quaternary amine groups) with thermoplastic polymer(s) (selected to support and/or reinforce the membrane), and with copolymer(s) (selected to enhance the compounding of the polymers)—by heating, mixing and cooling—to form blend pellets, extruding the blend pellets to form a blend film, cross-linking polymer(s), and functionalizing the blend film to prepare the anion exchange membrane. Functionalization comprises a quaternization step comprising reacting halogen groups of the first polymer with tertiary amines to produce the quaternary amine groups with ion-exchange functionality.Type: ApplicationFiled: March 21, 2024Publication date: September 26, 2024Applicant: HYDROLITE LTDInventors: Charly David AZRA, Yauhen AKAYEU, Amiram SISSO
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Publication number: 20240120518Abstract: Oxygen electrodes, production methods and reversible, alkaline or anion exchange membrane (AEM) electrochemical devices are provided. The oxygen electrodes are operable in the reversible devices both as cathodes of a fuel cell supporting an oxygen reduction reaction (ORR), and as anodes of an electrolyzer supporting an oxygen evolution reaction (OER). The oxygen electrodes comprise a substrate layer which may be a porous transport layer (PTL), possibly coated and/or hydrophobized, or a membrane; and a blend of catalysts which is deposited on the substrate layer to form a catalyst layer, and includes ORR catalyst (e.g., a platinum group metal), OER catalyst (e.g., nickel-based particles), and possibly binders such as ionomers, PTFE or other polymers that are resistant in alkaline environment, but with the catalyst layer and the substrate layer being devoid of elemental carbon.Type: ApplicationFiled: December 18, 2023Publication date: April 11, 2024Applicant: HYDROLITE LTDInventors: Mordechai KATTAN, Aviv ASHDOT, Ortal TIURIN BURSHTEIN, Charly David AZRA, Ervin TAL-GUTELMACHER
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Publication number: 20230369626Abstract: Membrane assemblies for electrochemical devices are provided, along with methods and system for fabricating them. Membrane assemblies comprise anode layer(s) and cathode layer(s), separated by membranous separation layer(s) and all embedded in continuous polymerized ionomer material. In production, during continuous deposition of ionomer material on a substrate (e.g., by electrospinning or electrospraying), consecutive deposition stages of catalyst material and optionally binder material are performed. For example, anode particles, binder material and cathode particles may be deposited (e.g., by electrospraying or electrospinning, respectively) consecutively during the continuous deposition o the ionomer material. Self-refueling power-generating system are provided, which include reversible anion exchange membrane devices with disclosed membrane assemblies.Type: ApplicationFiled: July 20, 2023Publication date: November 16, 2023Applicant: HYDROLITE LTDInventors: Charly David AZRA, Miles Page, Ervin Tal-Gutelmacher
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Publication number: 20230369612Abstract: Membrane assemblies and separation layer(s) for electrochemical devices such as fuel cells and/or electrolyzers are provided, as well as their production methods. The separation layer(s) include surface-charged particles such as LDH particles to strengthen the membranes, enhance their ionic conductivity and prevent or reduce membrane dehydration and/or chemical degradation. In various configurations a single or few, relatively thick separation layer(s) with surface-charged particles may be used, while in other configurations alternating layers of ionomeric material and layers with surface-charged particles may be used, optimizing ionic conductivity with mechanical strength. Thin protective layers with solids content up to 100% may be set adjacent to the electrodes, and the orientation of the surface-charged particles may be set to enhance the ion conductivity of the respective layer.Type: ApplicationFiled: July 20, 2023Publication date: November 16, 2023Applicant: HYDROLITE LTDInventors: Charly David AZRA, Miles PAGE, Alina AMEL, Ervin TAL-GUTELMACHER
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Publication number: 20230178781Abstract: Membrane electrode assemblies (MEA) and electrochemical devices such as fuel cells, electrolyzers and reversible devices are provided. The MEA comprises gas diffusion electrodes (GDEs) comprising respective gas diffusion layers (GDLs) coated with respective catalyst layers, and a thin membrane coated on either or both catalyst layers and having a total thickness of at most 30 microns. The GDEs are joined together to form the MEA with the thin membrane located between the catalyst layers, and the MEA is sealed and stacked to be operable in the electrochemical devices. Advantageously, using the GDEs to deposit the membrane enable forming very thin and efficient membranes.Type: ApplicationFiled: January 31, 2023Publication date: June 8, 2023Applicant: HYDROLITE LTDInventors: Charly David Azra, Miles Page, Ervin Tal-Gutelmacher
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Patent number: 11600827Abstract: A method of making an alkaline membrane fuel cell assembly is disclosed. The method may include: depositing a first catalyst layer on a first gas diffusion layer to form a first gas diffusion electrode; depositing a second catalyst layer one a second gas diffusion layer to form a second gas diffusion electrode; depositing a thin membrane on at least one of: the first catalyst layer and the second catalyst layer; joining together the first and second gas diffusion electrodes to form the alkaline fuel cell assembly such that the thin membrane is located between the first and second catalyst layers; and sealing the first and second gas diffusion layers, the first and second catalyst layers and the thin membrane from all sides.Type: GrantFiled: May 28, 2019Date of Patent: March 7, 2023Assignee: HYDROLITE LTDInventor: Charly David Azra
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Patent number: 11228050Abstract: Some aspects of the invention may be directed to a catalyst layer for anodes of Alkaline Exchange Membrane Fuel Cells (AEMFC). Such catalyst layer may include catalyst nanoparticles and an ionomer. Each catalyst nanoparticle may include one or more nanoparticles of catalytically active metal supported on at least one nanoparticle of crystalline RuO2. The diameter of the at least one nanoparticle of the crystalline RuO2 may be about order of magnitude larger than the diameter of the one or more nanoparticles of catalytically active metal.Type: GrantFiled: July 30, 2018Date of Patent: January 18, 2022Assignee: HYDROLITE LTDInventors: Yair Paska, Miles Page, Charly David Azra, Ben Achrai, Anna Kitayev
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Publication number: 20210265638Abstract: A method of making an alkaline membrane fuel cell assembly is disclosed. The method may include: depositing a first catalyst layer on a first gas diffusion layer to form a first gas diffusion electrode; depositing a second catalyst layer one a second gas diffusion layer to form a second gas diffusion electrode; depositing a thin membrane on at least one of: the first catalyst layer and the second catalyst layer; joining together the first and second gas diffusion electrodes to form the alkaline fuel cell assembly such that the thin membrane is located between the first and second catalyst layers; and sealing the first and second gas diffusion layers, the first and second catalyst layers and the thin membrane from all sides.Type: ApplicationFiled: May 28, 2019Publication date: August 26, 2021Applicant: POCELL TECH LTD.Inventor: Charly David AZRA
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Publication number: 20200161686Abstract: Some aspects of the invention may be directed to a catalyst layer for anodes of Alkaline Exchange Membrane Fuel Cells (AEMFC). Such catalyst layer may include catalyst nanoparticles and an ionomer. Each catalyst nanoparticle may include one or more nanoparticles of catalytically active metal supported on at least one nanoparticle of crystalline RuO2. The diameter of the at least one nanoparticle of the crystalline RuO2 may be about order of magnitude larger than the diameter of the one or more nanoparticles of catalytically active metal.Type: ApplicationFiled: July 30, 2018Publication date: May 21, 2020Applicant: POCELL TECH LTD.Inventors: Yair PASKA, Miles PAGE, Charly David AZRA, Ben ACHRAI, Anna KITAYEV