Synergistically Enhancing Capacitive Performance of Ti 3 C 2 T x MXene via Building Hierarchical Structure of TiO 2 Nanowire/MXene Composites and Utilizing Iron-Ion-Based Redox-Active Electrolytes.
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| Title: | Synergistically Enhancing Capacitive Performance of Ti 3 C 2 T x MXene via Building Hierarchical Structure of TiO 2 Nanowire/MXene Composites and Utilizing Iron-Ion-Based Redox-Active Electrolytes. |
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| Authors: | Wang, Xiaohan1 (AUTHOR), Du, Xusheng1 (AUTHOR) xdusydjn@email.jnu.edu.cn |
| Source: | Nanomaterials (2079-4991). Jun2026, Vol. 16 Issue 11, p671. 17p. |
| Subjects: | Titanium dioxide, MXenes, Surface preparation, Energy storage |
| Abstract: | In this work, a strategy for synergistic regulation of the Ti3C2Tx surface structure and redox activity of the electrolyte has been proposed. The surface modification of MXene was achieved via KOH treatment. Meanwhile, to cooperate with the surface-modified MXene electrode materials, Fe3+/Fe2+ was introduced into its common H2SO4 electrolyte to operate as a redox-active electrolyte for the first time. The results indicate that alkali treatment not only effectively reduces the amount of fluorine-terminal groups on the MXene surface but also forms in situ TiO2 nanowires on its surface, thereby forming a unique hierarchical structure for facilitating the electrochemical reaction. Further utilization of the Fe2+/Fe3+ redox-active electrolyte introduced additional pseudocapacitive reactions at the electrode/electrolyte interface, significantly enhancing the capacitive performance of the system. This synergistic effect of both the hierarchical 1D TiO2/MXene composite electrode materials and the redox-active electrolyte resulted in a substantial increase in specific capacitance from 78.17 F g−1 to 655.54 F g−1 at a current density of 10 Ag−1. The reaction kinetics of the electrochemical systems were studied, along with their energy storage mechanism. It is revealed that there is a transition of the energy storage mechanism from being dominated almost solely by diffusion control to collaborative diffusion and surface reactions in the synergistic electrode/electrolyte system, and the corresponding equivalent circuit has evolved from the single-interface model to a dual-interface model. This work has demonstrated that the proposed synergistic strategy can effectively enhance the capacitive performance of the MXene energy storage system and can be applied to other electrochemical systems. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI 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 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194587845 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Synergistically Enhancing Capacitive Performance of Ti 3 C 2 T x MXene via Building Hierarchical Structure of TiO 2 Nanowire/MXene Composites and Utilizing Iron-Ion-Based Redox-Active Electrolytes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wang%2C+Xiaohan%22">Wang, Xiaohan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Du%2C+Xusheng%22">Du, Xusheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xdusydjn@email.jnu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jun2026, Vol. 16 Issue 11, p671. 17p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22MXenes%22">MXenes</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+preparation%22">Surface preparation</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this work, a strategy for synergistic regulation of the Ti3C2Tx surface structure and redox activity of the electrolyte has been proposed. The surface modification of MXene was achieved via KOH treatment. Meanwhile, to cooperate with the surface-modified MXene electrode materials, Fe3+/Fe2+ was introduced into its common H2SO4 electrolyte to operate as a redox-active electrolyte for the first time. The results indicate that alkali treatment not only effectively reduces the amount of fluorine-terminal groups on the MXene surface but also forms in situ TiO2 nanowires on its surface, thereby forming a unique hierarchical structure for facilitating the electrochemical reaction. Further utilization of the Fe2+/Fe3+ redox-active electrolyte introduced additional pseudocapacitive reactions at the electrode/electrolyte interface, significantly enhancing the capacitive performance of the system. This synergistic effect of both the hierarchical 1D TiO2/MXene composite electrode materials and the redox-active electrolyte resulted in a substantial increase in specific capacitance from 78.17 F g−1 to 655.54 F g−1 at a current density of 10 Ag−1. The reaction kinetics of the electrochemical systems were studied, along with their energy storage mechanism. It is revealed that there is a transition of the energy storage mechanism from being dominated almost solely by diffusion control to collaborative diffusion and surface reactions in the synergistic electrode/electrolyte system, and the corresponding equivalent circuit has evolved from the single-interface model to a dual-interface model. This work has demonstrated that the proposed synergistic strategy can effectively enhance the capacitive performance of the MXene energy storage system and can be applied to other electrochemical systems. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI 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: 10.3390/nano16110671 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 17 StartPage: 671 Subjects: – SubjectFull: Titanium dioxide Type: general – SubjectFull: MXenes Type: general – SubjectFull: Surface preparation Type: general – SubjectFull: Energy storage Type: general Titles: – TitleFull: Synergistically Enhancing Capacitive Performance of Ti 3 C 2 T x MXene via Building Hierarchical Structure of TiO 2 Nanowire/MXene Composites and Utilizing Iron-Ion-Based Redox-Active Electrolytes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wang, Xiaohan – PersonEntity: Name: NameFull: Du, Xusheng IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 16 – Type: issue Value: 11 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
