公开(公告)号：US20250087708A1

公开(公告)日：2025-03-13

申请号：US18605103

申请日：2024-03-14

Applicant: Advent Technologies Holdings,Inc.

Inventor： Vincente Galvin ,  Cynthia Olson ,  Sean Vale ,  Jake Kracinovich ,  Ryan Pavlicek ,  Emory S. De Castro

IPC: H01M4/90 ,  H01M4/88 ,  H01M8/1004 ,  H01M8/1018

Abstract: The present invention provides a process for making a membrane electrode assembly (MEA) through a catalyst coated membrane (CCM) with phosphoric acid doped polymer electrolyte membrane. The polymer electrolyte membranes are composed of cationic-biphosphate ion pairs, with low acid content. The CCMs can be obtained either by direct coating on a membrane or to a transfer decal in a single step. The decal transfer is completed under mild temperature and pressure holds and show complete transfer of catalyst.

公开(公告)号：US20230399758A1

公开(公告)日：2023-12-14

申请号：US18323886

申请日：2023-05-25

Applicant: Advent Technologies Holdings, Inc.

Inventor： Ian Kendrick ,  Ryan Pavlicek ,  Emory Sayre De Castro

IPC: C25B11/032 ,  C25B11/052 ,  C25B11/065

CPC classification number: C25B11/032 ,  C25B11/052 ,  C25B11/065

Abstract: Aspects of the invention provide novel cathodes to be employed with membranes that can operate in ionomer membrane-based electrolyzer cells between at least 50- and 95-degrees C. The cathodes comprise a carbon-based substrate, e.g., of woven cloth or paper, a hydrophobic binder-containing microporous layer, e.g., polytetrafluoroethylene (PTFE), and a catalyst layer comprising electrocatalysts and binders demonstrating ionic conductivity over a range of dry and wet operating conditions. According to some aspects of the invention, at least one layer of the microporous layer or catalyst layer has defined pore structure.

公开(公告)号：US20230395816A1

公开(公告)日：2023-12-07

申请号：US18328735

申请日：2023-06-03

Applicant: Advent Technologies Holdings, Inc.

Inventor： Ian Kendrick ,  Sanjeev Mukerjee

IPC: H01M4/90 ,  C25B9/23

CPC classification number: H01M4/9041 ,  C25B9/23 ,  H01M2004/027

Abstract: Aspects of the invention provide ternary catalysts for oxygen evolution reactions comprised of Ni, Fe, and a third metal X, where X comprises any of Co, Zn, Al, Mn, or Cr. Still other aspects of the invention provide such ternary catalysts, where the molar ratios in preparation of the catalysts of Ni, Fe and X are any of 8:1:1, 7:2:1, 7:1:2, 6:3:1, 6:2:2, or 6:1:3 where the first number refers to nickel; the second number, iron; and, the third number, the metal X. Further aspects of the invention provide such ternary catalysts prepared by reducing corresponding salts of each of the metals Ni, Fe and X in the presence of aniline to yield respective oxides, hydroxides, and/or oxyhydroxides of each of those metals and, then, alloying a mixture of same in argon to yield the catalyst.

公开(公告)号：US20230307677A1

公开(公告)日：2023-09-28

申请号：US17704987

申请日：2022-03-25

Applicant: Advent Technologies Holdings, Inc.

Inventor： Ryan Pavlicek ,  Cynthia Lemay Olson ,  Amariah Condon ,  George Paloumbis ,  Emory Sayre De Castro

IPC: H01M8/1004

CPC classification number: H01M8/1004

Abstract: Aspects of the invention provide novel electrodes to be employed with membranes that can operate in fuel cell mode between at least 80- and 240-degrees C. The electrodes comprise a carbon-based substrate, e.g., of woven cloth or paper, a hydrophobic binder-containing microporous layer, e.g., polytetrafluoroethylene (PTFE), and a catalyst layer comprising electrocatalysts and binders demonstrating ionic conductivity over a range of dry and wet operating conditions. According to some aspects of the invention, at least one layer of the microporous layer or catalyst layer has defined pore structure and particle size distribution.

公开(公告)号：US20230302441A1

公开(公告)日：2023-09-28

申请号：US17704711

申请日：2022-03-25

Applicant: Advent Technologies Holdings, Inc.

Inventor： Christos L. Chochos ,  Panagiotis Bexis ,  Konstantinos Gournas ,  George Paloumbis ,  Vasilis Gregoriou

IPC: B01J41/14 ,  C08F238/00 ,  C07C49/697

CPC classification number: B01J41/14 ,  C08F238/00 ,  C07C49/697 ,  C07C2601/10

Abstract: The invention relates to the development of quaterphenylene polymer derivatives with synthetic methodologies towards controllable and integer degree of functionalization on the quaterphenylene polymer backbone with specific number of side phenyl groups and monovalent hydrocarbon groups terminated by a functional group consisting of quaternary ammonium groups resulting to precise IEC, water uptake and anionic conductivity without batch-to-batch variations and compatible with industrial manufacturing processes for use as membranes or ionomers in low temperature and high temperature polymer electrolyte membrane fuel cells.

公开(公告)号：US11453749B2

公开(公告)日：2022-09-27

申请号：US16285185

申请日：2019-02-25

Applicant: Advent Technologies Holdings, Inc.

Inventor： Emory Sayre De Castro ,  Christos L. Chochos ,  Nora Gourdoupi ,  Vasilis G. Gregoriou ,  George Paloumbis

IPC: C08G65/40 ,  G01N27/404 ,  C08L81/06 ,  C08G75/23

Abstract: Aromatic polymers exhibiting thermal stability and conductivity upon imbibement into an acid are disclosed for electrochemical gas sensor applications. Membrane electrode assemblies for electrochemical gas sensors are also provided, comprising a sensing electrode, a counter electrode, and a polymer membrane comprising the polymers of the present invention, disposed between the sensing electrode and the counter electrode.

公开(公告)号：US11342573B2

公开(公告)日：2022-05-24

申请号：US16806002

申请日：2020-03-02

Applicant: Advent Technologies Inc.

Inventor： George Paloumbis ,  Christos L. Chochos ,  Emory Sayre De Castro ,  Nora Gourdoupi ,  Ryan Pavlicek ,  Manav Sharma ,  Vasilis G. Gregoriou

IPC: H01M8/18 ,  H01M8/1032 ,  H01M8/1027

Abstract: The present invention relates to a class of polymer ion imbibed membranes for electrolyte flow batteries. The membranes are a conducting aromatic polyether type copolymer bearing nitrogen heterocycles groups, especially pyridine type. While the membranes can be used in acid, basic, and neutral electrolytes, the nitrogen heterocycles in the membrane interact with acid in the electrolyte to form a proton transport network, so as to keep the proton transport performance of the membrane. The membrane has excellent mechanical stability and thermostability as well as tunable porosity.

公开(公告)号：US20140308600A1

公开(公告)日：2014-10-16

申请号：US14253339

申请日：2014-04-15

Applicant: Advent Technologies Inc.

Inventor： Christos L. Chochos ,  Vasilis G. Gregoriou

IPC: C08G73/18 ,  H01M8/10 ,  H01M4/90

CPC classification number: C08G73/18 ,  H01M4/8668 ,  H01M4/8835 ,  H01M4/886 ,  H01M8/1004 ,  H01M8/1027 ,  H01M8/103 ,  H01M8/1032 ,  H01M8/1034 ,  H01M8/1081 ,  H01M2300/0082 ,  Y02P70/56

Abstract: New polymeric networks bearing benzimidazole units have been prepared. These polymeric networks will combine high proton conductivity, superior mechanical properties and thermal and oxidative stability due to the existence of polar benzimidazole groups and the presence of the unique polymeric architecture. The prepared polymer networks can be used in the catalyst ink of the electrodes in high temperature PEM fuel cells.

Abstract translation: 已经制备了具有苯并咪唑单元的新的聚合物网络。 由于存在极性苯并咪唑基团和存在独特的聚合物结构，这些聚合物网络将结合高质子传导性，优异的机械性能和热和氧化稳定性。 制备的聚合物网络可用于高温PEM燃料电池中电极的催化剂油墨中。

公开(公告)号：US20230349057A1

公开(公告)日：2023-11-02

申请号：US18309798

申请日：2023-04-29

Applicant: Advent Technologies Holdings, Inc.

Inventor： Ian M. Kendrick ,  Sanjeev Mukerjee

IPC: C25B11/089 ,  C25B11/065 ,  C23C18/50 ,  C23C18/16

CPC classification number: C25B11/089 ,  C25B11/065 ,  C23C18/50 ,  C23C18/1639 ,  C23C18/1658 ,  C23C18/1692

Abstract: The invention provides, in some aspects, methods for fabricating an electrode comprising a nickel/molybdenum (NiMo) hydrogen evolution reaction catalyst on a carbon support, e.g., for use as a cathode in an electrolyzer. A catalyst of the type described above can be prepared by co-precipitation of nickel and molybdenum oxide species on the carbon support followed by its reduction through heat treatment in the presence of nitrogen. Such a catalyst can alternatively be prepared through the thermal degradation of metal-organic complexes of nickel and molybdenum in the presence of the carbon support. Further aspects of the invention comprise a cathode, e.g., for an anion exchange membrane electrolyzer, comprising a nickel/molybdenum hydrogen evolution reaction catalyst as described above. Still further aspects of the invention comprise an anion exchange membrane electrolyzer with a cathode as described above.

公开(公告)号：US20230056393A1

公开(公告)日：2023-02-23

申请号：US18048274

申请日：2022-10-20

Applicant: ADVENT TECHNOLOGIES INC.

Inventor： Nikolaos G. THEODOROPOULOS ,  Thomas J. PAVLIK ,  Emory S. De Castro ,  Nora GOURDOUPI ,  Vassilios GREGORIOU

IPC: H01M8/04029 ,  H01M8/04007 ,  H01M8/2425 ,  H01M8/1004

Abstract: The present invention provides fuel cell stacks comprising effective means to maintain the fuel cell stacks at a constant temperature using plates mated to at least one face of the stack and in contact with the edges of the repeat and non-repeat layers while making use of the phase change of working-fluids such as water or water-organic species mixtures for heat transfer. Also provided are processes for maintaining said fuel cell stacks at a constant temperature by adjusting the flow rate and pressure of the cooling fluid so that both liquid and vapor are present at the same time.