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公开(公告)号：US20230093081A1
公开(公告)日：2023-03-23
申请号：US17476833
申请日：2021-09-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Bradley R. Frieberg , Xiaosong Huang , Nicole Ellison , Roland J. Koestner
IPC: H01M4/62 , H01M4/525 , H01M4/505 , H01M10/0525 , H01M4/583
Abstract: A positive electrode including positive electrode active material particles, a polymeric binder, a polymeric dispersant, and a combination of electrically conductive carbon additive types. The combination of electrically conductive carbon additive types includes carbon particles, graphene sheet stacks, and carbon nanotubes.
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公开(公告)号：US10381653B2
公开(公告)日：2019-08-13
申请号：US15447667
申请日：2017-03-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Roland J. Koestner , Swaminatha P. Kumaraguru , Irina A. Kozhinova
IPC: H01M4/92 , H01M4/86 , H01M8/1004 , H01M4/88 , H01M8/1039 , H01M8/1041 , H01M8/1018
Abstract: An electrode ink composition that forms a fuel cell catalyst layer with reduced mudcracking is provided. The ink composition includes a solvent, a platinum group metal-containing catalyst composition dispersed in the solvent, a primary polymer dispersed within the solvent, the primary polymer being an ionomer, and a secondary polymer dispersed within the solvent, the secondary polymer interacting with the primary polymer via a non-covalent interaction.
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公开(公告)号：US11799088B2
公开(公告)日：2023-10-24
申请号：US17573089
申请日：2022-01-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Nagappan Ramaswamy , Roland J. Koestner , Swaminatha P. Kumaraguru
CPC classification number: H01M4/8657 , H01M4/8663 , H01M4/8828 , H01M4/8885 , H01M2004/8689
Abstract: A cathode configured for use within a fuel cell system is provided. The cathode includes a cathode substrate. The cathode further includes a coating disposed upon the cathode substrate and including a fluorocarbon polymer additive configured for sintering at a temperature of less than 200° C. The fluorocarbon polymer additive may be mixed with a catalyst ink coating or may be applied separately as a topcoat layer.
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公开(公告)号：US11302926B2
公开(公告)日：2022-04-12
申请号：US16552477
申请日：2019-08-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Nagappan Ramaswamy , Roland J. Koestner , Swaminatha P. Kumaraguru
Abstract: Systems, methods, fuel cells, and mixtures to inhibit ionomer permeation into porous substrates using a crosslinked ionomer are described. A method includes preparing an ionomer premix, mixing a crosslinking additive with the ionomer premix to thereby form a crosslinked-ionomer solution, and adding catalyst particles to the crosslinked-ionomer solution to produce a catalyst ink. The ionomer premix includes an ionomer dispersed within a solvent. The catalyst ink includes the catalyst particles distributed homogenously therethrough. The catalyst ink may be cast onto a porous substrate and dried to thereby form a catalyst layer for use in a fuel cell.
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公开(公告)号：US20210066726A1
公开(公告)日：2021-03-04
申请号：US16552477
申请日：2019-08-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Nagappan Ramaswamy , Roland J. Koestner , Swaminatha P. Kumaraguru
Abstract: Systems, methods, fuel cells, and mixtures to inhibit ionomer permeation into porous substrates using a crosslinked ionomer are described. A method includes preparing an ionomer premix, mixing a crosslinking additive with the ionomer premix to thereby form a crosslinked-ionomer solution, and adding catalyst particles to the crosslinked-ionomer solution to produce a catalyst ink. The ionomer premix includes an ionomer dispersed within a solvent. The catalyst ink includes the catalyst particles distributed homogenously therethrough. The catalyst ink may be cast onto a porous substrate and dried to thereby form a catalyst layer for use in a fuel cell.
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Patent Agency Ranking
公开(公告)号：US20250100075A1
公开(公告)日：2025-03-27
申请号：US18474401
申请日：2023-09-26
Applicant: GM Global Technology Operations LLC
IPC: B23K26/064 , H01M4/02 , H01M4/04
Abstract: A system comprises a donor foil, a carrier substrate disposed adjacent the donor foil, an optical system configured to generate a laser beam through the donor foil and the carrier substrate to create a plurality of cathode voxels, and a current collector foil defined by an X-Y plane and configured to collect the plurality of cathode voxels in the X-Y plane, wherein a first set of the plurality of cathode voxels at a first location on the X-Y plane are diluted with a first amount of a solvent and a second set of the plurality of cathode voxels at a second location on the X-Y plane are diluted with a second amount of a solvent, the second amount of the solvent being less than the first amount of the solvent.
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公开(公告)号：US11967721B1
公开(公告)日：2024-04-23
申请号：US17993232
申请日：2022-11-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Bradley R Frieberg , Mengyuan Chen , Roland J. Koestner , Xiaosong Huang
IPC: H01M4/62 , H01M10/0568 , H01M10/0569 , H01M4/02
CPC classification number: H01M4/625 , H01M4/623 , H01M10/0568 , H01M10/0569 , H01M2004/021 , H01M2004/028 , H01M2300/0034
Abstract: A battery cathode includes: a current collector; and a coating applied to the current collector, the coating including: conductive carbon; polyvinylidene fluoride binder polymer; acid-functionalized dispersant polymer; and electrochemically active layered metal oxide.
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公开(公告)号：US20230223552A1
公开(公告)日：2023-07-13
申请号：US17573089
申请日：2022-01-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Nagappan Ramaswamy , Roland J. Koestner , Swaminatha P. Kumaraguru
CPC classification number: H01M4/8657 , H01M4/8885 , H01M4/8828 , H01M4/8663 , H01M2004/8689
Abstract: A cathode configured for use within a fuel cell system is provided. The cathode includes a cathode substrate. The cathode further includes a coating disposed upon the cathode substrate and including a fluorocarbon polymer additive configured for sintering at a temperature of less than 200° C. The fluorocarbon polymer additive may be mixed with a catalyst ink coating or may be applied separately as a topcoat layer.
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9.发明申请ELECTRODE DESIGN WITH OPTIMAL IONOMER CONTENT FOR POLYMER ELECTROLYTE MEMBRANE FUEL CELL 审中-公开电极设计与聚合物电解质膜燃料电池的最佳离子含量公开(公告)号：US20160064741A1
公开(公告)日：2016-03-03
申请号：US14474743
申请日：2014-09-02
Applicant: GM Global Technology Operations LLC
Inventor： Swaminatha P. Kumaraguru , Roland J. Koestner , Irina Kozhinova
CPC classification number: H01M4/8807 , H01M4/8663 , H01M4/8825 , H01M4/92 , H01M8/1004 , Y02P70/56
Abstract: A method of making a membrane electrode assembly for a fuel cell, a membrane electrode assembly, a fuel cell and a fuel cell system. The method includes preferentially adsorbing an ionomer and electrocatalyst mixture onto the surface of a porous fuel cell substrate by appropriate treatment of the mixture prior to or contemporaneous with placement of the mixture onto the substrate. This promotes retention of the ionomer-coated electrocatalyst at or near the surface of the substrate where catalytic activity between it and a proton exchange membrane is designed to take place. Retention of the ionomer-coated electrocatalyst near these interfacial regions by the present invention is preferable to having the ionomer and electrocatalyst be significantly absorbed into the substrate.
Abstract translation: 一种制造用于燃料电池，膜电极组件，燃料电池和燃料电池系统的膜电极组件的方法。 该方法包括通过在将混合物置于基材上之前或同时进行适当处理来优先将离聚物和电催化剂混合物吸附到多孔燃料电池基板的表面上。 这促进了离子聚合物涂覆的电催化剂在基底表面附近的保留，其中设计了其与质子交换膜之间的催化活性。 通过本发明在这些界面区附近保留离聚物涂覆的电催化剂优选使离子聚合物和电催化剂显着吸收到基材中。
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公开(公告)号：US20250062337A1
公开(公告)日：2025-02-20
申请号：US18451163
申请日：2023-08-17
Applicant: GM Global Technology Operations LLC
Inventor： Colin Jamison , Jiazhu Hu , Bradley R. Frieberg , Roland J. Koestner , Nicole Ellison , Yuntao Gu
IPC: H01M4/525 , H01M4/04 , H01M4/505 , H01M4/62 , H01M10/0525
Abstract: A cathode for use in a lithium ion battery includes an active material present in an amount of from 70 to 99 weight percent, wherein the active material includes a lithium rich nickel manganese oxide; a conductive network of a mixture of conductive elements present in an amount of from 0.25 to 20 weight percent, wherein the mixture of conductive elements includes two or more of low aspect ratio particles, plate-like particles, and needle-like particles; and a binder system present in an amount of from 0.25 to 10 weight percent, wherein the binder system includes a primary binder polymer and an acid group or a salt thereof, wherein the amounts are based on a total weight of the cathode.
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