Low humidification effect on performance of proton exchange membrane fuel cells under high current density conditions.
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| Title: | Low humidification effect on performance of proton exchange membrane fuel cells under high current density conditions. |
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| Authors: | Guo, Zi Rui1 (AUTHOR), Chen, Hao1 (AUTHOR) chenh@bjut.edu.cn, Guo, Hang1 (AUTHOR), Ye, Fang1 (AUTHOR) |
| Source: | International Communications in Heat & Mass Transfer. Jun2024, Vol. 155, pN.PAG-N.PAG. 1p. |
| Subjects: | Fuel cells, Proton exchange membrane fuel cells, Humidity control |
| Abstract: | To enhance water management in proton exchange membrane fuel cells, the influence of drying and flooding on performance in different voltage ranges is investigated by experiment. The current density attenuates as the voltage decreases in the concentration polarization range. Through the analysis of the performance curves under different conditions, the performance attenuation is due to the high current and overpotential at low voltage, which leads to the temperature rising and drying up. At high flow rates, the current attenuates at low voltages, indicating that the current density attenuation is not because of flooding and insufficient reactants. According to calculations, the anode water content is low due to more protons and water being transferred from anode toward cathode at the high current, which causes the current density to attenuate. From the current ratio, the cell can generate an additional current density of 3.2% at 0.1 V voltage, which can evaluate the degree of carbon corrosion and water electrolyzation due to the insufficient supply of reactants. In addition, the voltage undershoot of switching to high current is great, and the fuel cell has a high demand for water. Finally, reducing temperature and increasing humidification can alleviate the attenuation of current density. • Current attenuates at high overpotential due to temperature increasing and drying. • Current ratio evaluates carbon corrosion and water electrolysis caused by starvation. • The increase in proton transport at a high current causes the anode to dry up. • Reducing temperature and providing humidification can alleviate the current decrease. [ABSTRACT FROM AUTHOR] |
| Copyright of International Communications in Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 177453975 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Low humidification effect on performance of proton exchange membrane fuel cells under high current density conditions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Guo%2C+Zi+Rui%22">Guo, Zi Rui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Hao%22">Chen, Hao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chenh@bjut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Guo%2C+Hang%22">Guo, Hang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ye%2C+Fang%22">Ye, Fang</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Communications+in+Heat+%26+Mass+Transfer%22">International Communications in Heat & Mass Transfer</searchLink>. Jun2024, Vol. 155, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Fuel+cells%22">Fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Proton+exchange+membrane+fuel+cells%22">Proton exchange membrane fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Humidity+control%22">Humidity control</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: To enhance water management in proton exchange membrane fuel cells, the influence of drying and flooding on performance in different voltage ranges is investigated by experiment. The current density attenuates as the voltage decreases in the concentration polarization range. Through the analysis of the performance curves under different conditions, the performance attenuation is due to the high current and overpotential at low voltage, which leads to the temperature rising and drying up. At high flow rates, the current attenuates at low voltages, indicating that the current density attenuation is not because of flooding and insufficient reactants. According to calculations, the anode water content is low due to more protons and water being transferred from anode toward cathode at the high current, which causes the current density to attenuate. From the current ratio, the cell can generate an additional current density of 3.2% at 0.1 V voltage, which can evaluate the degree of carbon corrosion and water electrolyzation due to the insufficient supply of reactants. In addition, the voltage undershoot of switching to high current is great, and the fuel cell has a high demand for water. Finally, reducing temperature and increasing humidification can alleviate the attenuation of current density. • Current attenuates at high overpotential due to temperature increasing and drying. • Current ratio evaluates carbon corrosion and water electrolysis caused by starvation. • The increase in proton transport at a high current causes the anode to dry up. • Reducing temperature and providing humidification can alleviate the current decrease. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Communications in Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.icheatmasstransfer.2024.107505 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Fuel cells Type: general – SubjectFull: Proton exchange membrane fuel cells Type: general – SubjectFull: Humidity control Type: general Titles: – TitleFull: Low humidification effect on performance of proton exchange membrane fuel cells under high current density conditions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Guo, Zi Rui – PersonEntity: Name: NameFull: Chen, Hao – PersonEntity: Name: NameFull: Guo, Hang – PersonEntity: Name: NameFull: Ye, Fang IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 07351933 Numbering: – Type: volume Value: 155 Titles: – TitleFull: International Communications in Heat & Mass Transfer Type: main |
| ResultId | 1 |
