WO2007078289A3 - Rejuvenating contaminated fuel cell electrodes with ozone - Google Patents

Rejuvenating contaminated fuel cell electrodes with ozone Download PDF

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Publication number
WO2007078289A3
WO2007078289A3 PCT/US2005/047491 US2005047491W WO2007078289A3 WO 2007078289 A3 WO2007078289 A3 WO 2007078289A3 US 2005047491 W US2005047491 W US 2005047491W WO 2007078289 A3 WO2007078289 A3 WO 2007078289A3
Authority
WO
WIPO (PCT)
Prior art keywords
ozone
fuel cell
rejuvenating
electrodes
cell electrodes
Prior art date
Application number
PCT/US2005/047491
Other languages
French (fr)
Other versions
WO2007078289A2 (en
Inventor
Robert M Darling
Sathya Motupally
Original Assignee
Utc Fuel Cells Llc
Robert M Darling
Sathya Motupally
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Utc Fuel Cells Llc, Robert M Darling, Sathya Motupally filed Critical Utc Fuel Cells Llc
Priority to PCT/US2005/047491 priority Critical patent/WO2007078289A2/en
Publication of WO2007078289A2 publication Critical patent/WO2007078289A2/en
Publication of WO2007078289A3 publication Critical patent/WO2007078289A3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
    • H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

Contaminants are removed from one or both electrodes of proton exchange membrane fuel cells (23, 25) in a stack (17), periodically, after the fuel cell stack is shut down, by flowing an ozone containing gas (12, 13) through the oxidant reactant gas flow fields (35, 23, 25, 38) of the fuel cells and/or by flowing a mixture of nitrogen (12) and ozone (13) through the fuel reactant gas flow fields (21, 23, 24, 25, 28) of the fuel cells. Shorting (55) the electrodes allows cleansing both electrodes at once.
PCT/US2005/047491 2005-12-29 2005-12-29 Rejuvenating contaminated fuel cell electrodes with ozone WO2007078289A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2005/047491 WO2007078289A2 (en) 2005-12-29 2005-12-29 Rejuvenating contaminated fuel cell electrodes with ozone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2005/047491 WO2007078289A2 (en) 2005-12-29 2005-12-29 Rejuvenating contaminated fuel cell electrodes with ozone

Publications (2)

Publication Number Publication Date
WO2007078289A2 WO2007078289A2 (en) 2007-07-12
WO2007078289A3 true WO2007078289A3 (en) 2007-10-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/047491 WO2007078289A2 (en) 2005-12-29 2005-12-29 Rejuvenating contaminated fuel cell electrodes with ozone

Country Status (1)

Country Link
WO (1) WO2007078289A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9368817B2 (en) * 2009-10-16 2016-06-14 GL Global Technology Operations LLC In-situ fuel cell stack reconditioning
US20140170512A1 (en) * 2012-12-19 2014-06-19 GM Global Technology Operations LLC Method for mitigating recoverable voltage loss through humidification control
CN108987768B (en) * 2018-06-26 2023-05-09 华电电力科学研究院有限公司 Self-purifying fuel cell system and self-purifying method
DE102022206069A1 (en) 2022-06-15 2023-12-21 Robert Bosch Gesellschaft mit beschränkter Haftung Fuel cell system with electrolysis cell stack, vehicle and method for cleaning a catalytic converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040001980A1 (en) * 2002-06-26 2004-01-01 Balliet Ryan J. System and method for shutting down a fuel cell power plant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040001980A1 (en) * 2002-06-26 2004-01-01 Balliet Ryan J. System and method for shutting down a fuel cell power plant

Also Published As

Publication number Publication date
WO2007078289A2 (en) 2007-07-12

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