Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage
Abstract A noble surface engineering method was developed to create a binder-free flexible electrode comprising Ti3C2T x MXene/carbon nanofibers (MCNFs) covered by amorphous RuO x with a combined electrospinning and hydrothermal process. Utilizing the hydrophilicity of the MXene on/in the MCNFs, RuO...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-05-01
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| Series: | NPG Asia Materials |
| Online Access: | https://doi.org/10.1038/s41427-023-00476-x |
| _version_ | 1827327080470151168 |
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| author | Hyewon Hwang Sungeun Yang Seoyeon Yuk Kug-Seung Lee Segi Byun Dongju Lee |
| author_facet | Hyewon Hwang Sungeun Yang Seoyeon Yuk Kug-Seung Lee Segi Byun Dongju Lee |
| author_sort | Hyewon Hwang |
| collection | DOAJ |
| description | Abstract A noble surface engineering method was developed to create a binder-free flexible electrode comprising Ti3C2T x MXene/carbon nanofibers (MCNFs) covered by amorphous RuO x with a combined electrospinning and hydrothermal process. Utilizing the hydrophilicity of the MXene on/in the MCNFs, RuO x was easily coated on the surfaces of the MCNFs through oxygen-mediated chemical bonding between the functional groups of the MXene and Ru ions. A structural analysis revealed that the MXene acted as a growth template for RuO x and that the formed RuOx had an amorphous and disordered state in the composite electrode, which impacted the electrochemical performance. The electrochemical tests showed that these composite electrodes improved the electrochemical performance, with a two-fold increase in the gravimetric capacitance (279.4 F/g at 2 mV/s) relative to that of pristine MCNFs, a wide potential window (from 0.7 to 1 V) providing a superior energy density of 8.5 Wh/kg at a power density of 85.8 W/kg, as well as long-term cycling stability (99% after 10,000 cycles). The synergetic effect of the RuO x and MXene in the composite electrodes was attributed to an enhanced pseudocapacitive reaction. Our novel electrodes and fabrication method confirm the great potential of CNF-based composites for the development of high-performance binder-free electrodes for supercapacitors. |
| first_indexed | 2024-03-07T14:54:53Z |
| format | Article |
| id | doaj.art-cb295d2ea78b476695c438a9faf86208 |
| institution | Directory Open Access Journal |
| issn | 1884-4057 |
| language | English |
| last_indexed | 2024-03-07T14:54:53Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | NPG Asia Materials |
| spelling | doaj.art-cb295d2ea78b476695c438a9faf862082024-03-05T19:29:17ZengNature PortfolioNPG Asia Materials1884-40572023-05-0115111310.1038/s41427-023-00476-xTi3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storageHyewon Hwang0Sungeun Yang1Seoyeon Yuk2Kug-Seung Lee3Segi Byun4Dongju Lee5Department of Urban, Energy, and Environmental Engineering, Chungbuk National UniversityCenter for Energy Materials Research, Korea Institute of Science and Technology (KIST)Department of Urban, Energy, and Environmental Engineering, Chungbuk National UniversityPohang Accelerator LaboratoryHigh Temperature Energy Conversion Laboratory, Korea Institute of Energy Research (KIER)Department of Urban, Energy, and Environmental Engineering, Chungbuk National UniversityAbstract A noble surface engineering method was developed to create a binder-free flexible electrode comprising Ti3C2T x MXene/carbon nanofibers (MCNFs) covered by amorphous RuO x with a combined electrospinning and hydrothermal process. Utilizing the hydrophilicity of the MXene on/in the MCNFs, RuO x was easily coated on the surfaces of the MCNFs through oxygen-mediated chemical bonding between the functional groups of the MXene and Ru ions. A structural analysis revealed that the MXene acted as a growth template for RuO x and that the formed RuOx had an amorphous and disordered state in the composite electrode, which impacted the electrochemical performance. The electrochemical tests showed that these composite electrodes improved the electrochemical performance, with a two-fold increase in the gravimetric capacitance (279.4 F/g at 2 mV/s) relative to that of pristine MCNFs, a wide potential window (from 0.7 to 1 V) providing a superior energy density of 8.5 Wh/kg at a power density of 85.8 W/kg, as well as long-term cycling stability (99% after 10,000 cycles). The synergetic effect of the RuO x and MXene in the composite electrodes was attributed to an enhanced pseudocapacitive reaction. Our novel electrodes and fabrication method confirm the great potential of CNF-based composites for the development of high-performance binder-free electrodes for supercapacitors.https://doi.org/10.1038/s41427-023-00476-x |
| spellingShingle | Hyewon Hwang Sungeun Yang Seoyeon Yuk Kug-Seung Lee Segi Byun Dongju Lee Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage NPG Asia Materials |
| title | Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage |
| title_full | Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage |
| title_fullStr | Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage |
| title_full_unstemmed | Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage |
| title_short | Ti3C2Tx MXene as a growth template for amorphous RuOx in carbon nanofiber-based flexible electrodes for enhanced pseudocapacitive energy storage |
| title_sort | ti3c2tx mxene as a growth template for amorphous ruox in carbon nanofiber based flexible electrodes for enhanced pseudocapacitive energy storage |
| url | https://doi.org/10.1038/s41427-023-00476-x |
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