Corrosion of Graphite-Polypropylene Current Collectors during Overcharging in Negative and Positive Vanadium Redox Flow Battery Half-Cell Electrolytes.
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| Title: | Corrosion of Graphite-Polypropylene Current Collectors during Overcharging in Negative and Positive Vanadium Redox Flow Battery Half-Cell Electrolytes. |
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| Authors: | Satola, Barbara1,2, Komsiyska, Lidiya1, Wittstock, Gunther2 |
| Source: | Journal of The Electrochemical Society. 2018, Vol. 165 Issue 5, pA963-A969. 7p. |
| Subjects: | Electrolytes, Lithium-ion batteries, Energy storage |
| Abstract: | Graphite-polypropylene bipolar plates (BPP) were subjected to galvanostatic treatment in highly charged positive and negative vanadium electrolyte solutions. The tests were performed in an ex-situ three-electrode electrochemical cell in order to simulate aging under harsh overcharging conditions in a vanadium redox flow battery (VRFB). Non-destructive computed microtomography (microCT) technique was employed to study the post aging morphological changes. The investigations revealed that even under massive hydrogen evolution conditions in the negative electrolyte the BPP is stable. However, the BPP suffers from intense corrosion associated with morphological deformations during aging by galvanostatic overcharging in the positive electrolyte. The CO/CO2 gas evolution leads to formation of an open pore network, development of micro-cracks and meso-fractures. These morphological changes cause an expansion of the corroded bulk material. The results show that the corrosion starts at the electrolyte/BPP interface and propagates with time in plane-parallel direction to the back side of the BPP. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of The Electrochemical Society is the property of IOP Publishing 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: 129317292 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Corrosion of Graphite-Polypropylene Current Collectors during Overcharging in Negative and Positive Vanadium Redox Flow Battery Half-Cell Electrolytes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Satola%2C+Barbara%22">Satola, Barbara</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Komsiyska%2C+Lidiya%22">Komsiyska, Lidiya</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wittstock%2C+Gunther%22">Wittstock, Gunther</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+The+Electrochemical+Society%22">Journal of The Electrochemical Society</searchLink>. 2018, Vol. 165 Issue 5, pA963-A969. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electrolytes%22">Electrolytes</searchLink><br /><searchLink fieldCode="DE" term="%22Lithium-ion+batteries%22">Lithium-ion batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Graphite-polypropylene bipolar plates (BPP) were subjected to galvanostatic treatment in highly charged positive and negative vanadium electrolyte solutions. The tests were performed in an ex-situ three-electrode electrochemical cell in order to simulate aging under harsh overcharging conditions in a vanadium redox flow battery (VRFB). Non-destructive computed microtomography (microCT) technique was employed to study the post aging morphological changes. The investigations revealed that even under massive hydrogen evolution conditions in the negative electrolyte the BPP is stable. However, the BPP suffers from intense corrosion associated with morphological deformations during aging by galvanostatic overcharging in the positive electrolyte. The CO/CO2 gas evolution leads to formation of an open pore network, development of micro-cracks and meso-fractures. These morphological changes cause an expansion of the corroded bulk material. The results show that the corrosion starts at the electrolyte/BPP interface and propagates with time in plane-parallel direction to the back side of the BPP. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of The Electrochemical Society is the property of IOP Publishing 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: 10.1149/2.0921805jes Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: A963 Subjects: – SubjectFull: Electrolytes Type: general – SubjectFull: Lithium-ion batteries Type: general – SubjectFull: Energy storage Type: general Titles: – TitleFull: Corrosion of Graphite-Polypropylene Current Collectors during Overcharging in Negative and Positive Vanadium Redox Flow Battery Half-Cell Electrolytes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Satola, Barbara – PersonEntity: Name: NameFull: Komsiyska, Lidiya – PersonEntity: Name: NameFull: Wittstock, Gunther IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: 2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 00134651 Numbering: – Type: volume Value: 165 – Type: issue Value: 5 Titles: – TitleFull: Journal of The Electrochemical Society Type: main |
| ResultId | 1 |
