Effects of temperature and pressure on the limiting current density of PEM electrolysis cells based on a theoretical prediction model and experiments.
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| Title: | Effects of temperature and pressure on the limiting current density of PEM electrolysis cells based on a theoretical prediction model and experiments. |
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| Authors: | Ma, Songsong1 (AUTHOR), Li, Linjun1 (AUTHOR), Kohama, Ryuta1 (AUTHOR), Nakajima, Hironori1,2 (AUTHOR), Ito, Kohei1,2,3 (AUTHOR) kohei@mech.kyushu-u.ac.jp |
| Source: | International Journal of Hydrogen Energy. Jun2024, Vol. 71, p1428-1441. 14p. |
| Subjects: | Temperature effect, Electrolysis, Prediction models, Oxygen saturation, Polyelectrolytes, Anodes |
| Abstract: | Operation at high current density of polymer electrolyte membrane electrolysis cell (PEMEC) can reduce its electrode area and capital expense. The high current density operation is limited by the limiting current density (LCD), where electrolysis voltage abruptly increases. Effects of operating temperature and pressure on the LCD were evaluated in a lab-scale PEMEC within a range from 70 to 90 °C and from 0.1 to 0.3 MPa. Also, a theoretical model was developed to predict the LCD, and to clarify what determines LCD and how the operating conditions influence the LCD. The theoretical analysis suggests that when current density is close to the LCD, water mass transport at anode reaches a limitation, which indicates that water saturation reaches almost zero at anodic catalyst layer. The analysis also finds that lower operating temperature and higher operating pressure can reduce oxygen gas saturation and raise the water saturation in porous transport layer at anode, and finally enlarge the LCD. • Limiting current density (LCD) is decided by mass transport limitation. • Oxygen gas saturation near catalyst layer is close to 1 at LCD. • Bubble overvoltage abruptly rises at LCD. • Lower temperature and higher pressure enlarge LCD. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Hydrogen Energy 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: 177880023 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effects of temperature and pressure on the limiting current density of PEM electrolysis cells based on a theoretical prediction model and experiments. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ma%2C+Songsong%22">Ma, Songsong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Linjun%22">Li, Linjun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kohama%2C+Ryuta%22">Kohama, Ryuta</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nakajima%2C+Hironori%22">Nakajima, Hironori</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ito%2C+Kohei%22">Ito, Kohei</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> kohei@mech.kyushu-u.ac.jp</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Jun2024, Vol. 71, p1428-1441. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Electrolysis%22">Electrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Prediction+models%22">Prediction models</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+saturation%22">Oxygen saturation</searchLink><br /><searchLink fieldCode="DE" term="%22Polyelectrolytes%22">Polyelectrolytes</searchLink><br /><searchLink fieldCode="DE" term="%22Anodes%22">Anodes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Operation at high current density of polymer electrolyte membrane electrolysis cell (PEMEC) can reduce its electrode area and capital expense. The high current density operation is limited by the limiting current density (LCD), where electrolysis voltage abruptly increases. Effects of operating temperature and pressure on the LCD were evaluated in a lab-scale PEMEC within a range from 70 to 90 °C and from 0.1 to 0.3 MPa. Also, a theoretical model was developed to predict the LCD, and to clarify what determines LCD and how the operating conditions influence the LCD. The theoretical analysis suggests that when current density is close to the LCD, water mass transport at anode reaches a limitation, which indicates that water saturation reaches almost zero at anodic catalyst layer. The analysis also finds that lower operating temperature and higher operating pressure can reduce oxygen gas saturation and raise the water saturation in porous transport layer at anode, and finally enlarge the LCD. • Limiting current density (LCD) is decided by mass transport limitation. • Oxygen gas saturation near catalyst layer is close to 1 at LCD. • Bubble overvoltage abruptly rises at LCD. • Lower temperature and higher pressure enlarge LCD. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Hydrogen Energy 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.ijhydene.2024.05.345 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1428 Subjects: – SubjectFull: Temperature effect Type: general – SubjectFull: Electrolysis Type: general – SubjectFull: Prediction models Type: general – SubjectFull: Oxygen saturation Type: general – SubjectFull: Polyelectrolytes Type: general – SubjectFull: Anodes Type: general Titles: – TitleFull: Effects of temperature and pressure on the limiting current density of PEM electrolysis cells based on a theoretical prediction model and experiments. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ma, Songsong – PersonEntity: Name: NameFull: Li, Linjun – PersonEntity: Name: NameFull: Kohama, Ryuta – PersonEntity: Name: NameFull: Nakajima, Hironori – PersonEntity: Name: NameFull: Ito, Kohei IsPartOfRelationships: – BibEntity: Dates: – D: 19 M: 06 Text: Jun2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 03603199 Numbering: – Type: volume Value: 71 Titles: – TitleFull: International Journal of Hydrogen Energy Type: main |
| ResultId | 1 |
