High electrocatalytic performance of N and O atomic co-functionalized carbon electrodes for vanadium redox flow battery.
Saved in:
| Title: | High electrocatalytic performance of N and O atomic co-functionalized carbon electrodes for vanadium redox flow battery. |
|---|---|
| Authors: | Kim, Jiyeon1, Lim, Hyebin1, Jyoung, Jy-Young2, Lee, Eun-Sook2, Yi, Jung S.3, Lee, Doohwan1 dolee@uos.ac.kr |
| Source: | Carbon. Jan2017, Vol. 111, p592-601. 10p. |
| Subjects: | Carbon electrodes, Electrocatalysis, Vanadium, Oxidation-reduction reaction, Ammoxidation, Chemical kinetics |
| Abstract: | The effects of nitrogen and oxygen atomic co-functionalization of graphite felt (GF) by ammoxidation reactions for the positive and negative electrodes of vanadium redox flow battery (VRFB) are investigated. Ammoxidative surface reactions of the pristine-GF with NH 3 /O 2 results in effective N and O co-doping dominantly with kinetically relevant N and O functional groups; pyrrolic-N, pyridinic-N, and hydroxyl with high site densities. The intrinsic rate measurements reveal that the N and O co-functionalized GF electrodes (referred to as N-GF) afford one to several orders magnitude higher VO 2+ /VO 2 + and V 2+ /V 3+ redox kinetics than the pristine-GF. Notably, the N and O co-functionalization gives rise to 2–3 folds greater reaction kinetics for both half-cell reactions than the conventional electrodes doped only with O functional groups (O-GF) at similar atomic contents. The high electrocatalytic properties of N-GF afford 4–6% greater voltage and energy efficiencies in VRFB than the conventional O-GF electrode at high current density (110 mA cm −2 ) with ∼38% higher initial charge-discharge capability owing to the significantly reduced overpotential. These results suggest the marked synergetic contributions of N and O co-functionalization of carbon electrode for facilitation of vanadium redox kinetics and the high effectiveness of the simple and scalable ammoxidation-based functionalization protocol. [ABSTRACT FROM AUTHOR] |
| Copyright of Carbon is the property of Elsevier B.V. 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 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 119441904 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: High electrocatalytic performance of N and O atomic co-functionalized carbon electrodes for vanadium redox flow battery. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kim%2C+Jiyeon%22">Kim, Jiyeon</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lim%2C+Hyebin%22">Lim, Hyebin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jyoung%2C+Jy-Young%22">Jyoung, Jy-Young</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Eun-Sook%22">Lee, Eun-Sook</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Yi%2C+Jung+S%2E%22">Yi, Jung S.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Doohwan%22">Lee, Doohwan</searchLink><relatesTo>1</relatesTo><i> dolee@uos.ac.kr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Carbon%22">Carbon</searchLink>. Jan2017, Vol. 111, p592-601. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Carbon+electrodes%22">Carbon electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Electrocatalysis%22">Electrocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Vanadium%22">Vanadium</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation-reduction+reaction%22">Oxidation-reduction reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Ammoxidation%22">Ammoxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The effects of nitrogen and oxygen atomic co-functionalization of graphite felt (GF) by ammoxidation reactions for the positive and negative electrodes of vanadium redox flow battery (VRFB) are investigated. Ammoxidative surface reactions of the pristine-GF with NH 3 /O 2 results in effective N and O co-doping dominantly with kinetically relevant N and O functional groups; pyrrolic-N, pyridinic-N, and hydroxyl with high site densities. The intrinsic rate measurements reveal that the N and O co-functionalized GF electrodes (referred to as N-GF) afford one to several orders magnitude higher VO 2+ /VO 2 + and V 2+ /V 3+ redox kinetics than the pristine-GF. Notably, the N and O co-functionalization gives rise to 2–3 folds greater reaction kinetics for both half-cell reactions than the conventional electrodes doped only with O functional groups (O-GF) at similar atomic contents. The high electrocatalytic properties of N-GF afford 4–6% greater voltage and energy efficiencies in VRFB than the conventional O-GF electrode at high current density (110 mA cm −2 ) with ∼38% higher initial charge-discharge capability owing to the significantly reduced overpotential. These results suggest the marked synergetic contributions of N and O co-functionalization of carbon electrode for facilitation of vanadium redox kinetics and the high effectiveness of the simple and scalable ammoxidation-based functionalization protocol. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Carbon is the property of Elsevier B.V. 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=119441904 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.carbon.2016.10.043 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 592 Subjects: – SubjectFull: Carbon electrodes Type: general – SubjectFull: Electrocatalysis Type: general – SubjectFull: Vanadium Type: general – SubjectFull: Oxidation-reduction reaction Type: general – SubjectFull: Ammoxidation Type: general – SubjectFull: Chemical kinetics Type: general Titles: – TitleFull: High electrocatalytic performance of N and O atomic co-functionalized carbon electrodes for vanadium redox flow battery. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kim, Jiyeon – PersonEntity: Name: NameFull: Lim, Hyebin – PersonEntity: Name: NameFull: Jyoung, Jy-Young – PersonEntity: Name: NameFull: Lee, Eun-Sook – PersonEntity: Name: NameFull: Yi, Jung S. – PersonEntity: Name: NameFull: Lee, Doohwan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00086223 Numbering: – Type: volume Value: 111 Titles: – TitleFull: Carbon Type: main |
| ResultId | 1 |
