In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor
MXene (Ti3C2Tx) is a promising electrode material for supercapacitors. However, the current MXene material preparation process often requires hydrofluoric acid, and the etched MXene is easily oxidized and stacked, which is not conducive to the transfer of electrons and ions. In this study, we propos...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Arabian Journal of Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535223010134 |
| _version_ | 1797356166205931520 |
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| author | Kefeng Xie Jie Wang Kai Xu Zheng Wei Mingli Zhang Junping Zhang |
| author_facet | Kefeng Xie Jie Wang Kai Xu Zheng Wei Mingli Zhang Junping Zhang |
| author_sort | Kefeng Xie |
| collection | DOAJ |
| description | MXene (Ti3C2Tx) is a promising electrode material for supercapacitors. However, the current MXene material preparation process often requires hydrofluoric acid, and the etched MXene is easily oxidized and stacked, which is not conducive to the transfer of electrons and ions. In this study, we proposed a high concentration of sodium hydroxide solution mixed with sodium hypochlorite solution as an etchant for the preparation of fluorine-free MXene (Ti3C2Tx). Based on the alkali-assisted hydrothermal method, Ti3AlC2 was used as the raw material, and 10 % NaClO aqueous solution was added as the oxidant during the etching process to accelerate the etching and in-situ generate TiO2 with excellent conductivity. When the oxidation time is 12 h and the amount of NaClO is 0.2 mL, the TiO2 particles in-situ generated by the oxidation of Ti element in MXene are evenly distributed on the surface and interlayer of the material, which effectively curbs the stacking problem between the Ti3C2Tx layers and improves the specific surface area of the material. The prepared MXene/TiO2 electrode in 1 M H2SO4 electrolyte, − 0.5–0.2 V voltage window, the highest mass specific capacity can reach 321F/g, and after 10,000 charge–discharge cycles, the capacitance retention rate can still reach 86.4 %, which is higher than the capacitance retention rate of Ti3C2Tx material (81.7 %). |
| first_indexed | 2024-03-08T14:21:43Z |
| format | Article |
| id | doaj.art-ec1cce7cc82b4bcface79cb3d3f03fce |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-03-08T14:21:43Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-ec1cce7cc82b4bcface79cb3d3f03fce2024-01-14T05:37:56ZengElsevierArabian Journal of Chemistry1878-53522024-02-01172105551In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitorKefeng Xie0Jie Wang1Kai Xu2Zheng Wei3Mingli Zhang4Junping Zhang5School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Corresponding authors.School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaSchool of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaHenan Academy Institute of Traditional Chinese Medicine, Zhengzhou 45000, ChinaHenan Academy Institute of Traditional Chinese Medicine, Zhengzhou 45000, China; Corresponding authors.Henan Academy Institute of Traditional Chinese Medicine, Zhengzhou 45000, China; Corresponding authors.MXene (Ti3C2Tx) is a promising electrode material for supercapacitors. However, the current MXene material preparation process often requires hydrofluoric acid, and the etched MXene is easily oxidized and stacked, which is not conducive to the transfer of electrons and ions. In this study, we proposed a high concentration of sodium hydroxide solution mixed with sodium hypochlorite solution as an etchant for the preparation of fluorine-free MXene (Ti3C2Tx). Based on the alkali-assisted hydrothermal method, Ti3AlC2 was used as the raw material, and 10 % NaClO aqueous solution was added as the oxidant during the etching process to accelerate the etching and in-situ generate TiO2 with excellent conductivity. When the oxidation time is 12 h and the amount of NaClO is 0.2 mL, the TiO2 particles in-situ generated by the oxidation of Ti element in MXene are evenly distributed on the surface and interlayer of the material, which effectively curbs the stacking problem between the Ti3C2Tx layers and improves the specific surface area of the material. The prepared MXene/TiO2 electrode in 1 M H2SO4 electrolyte, − 0.5–0.2 V voltage window, the highest mass specific capacity can reach 321F/g, and after 10,000 charge–discharge cycles, the capacitance retention rate can still reach 86.4 %, which is higher than the capacitance retention rate of Ti3C2Tx material (81.7 %).http://www.sciencedirect.com/science/article/pii/S1878535223010134MXeneFluorine-freeTiO2In-situ SynthesisSupercapacitor |
| spellingShingle | Kefeng Xie Jie Wang Kai Xu Zheng Wei Mingli Zhang Junping Zhang In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor Arabian Journal of Chemistry MXene Fluorine-free TiO2 In-situ Synthesis Supercapacitor |
| title | In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor |
| title_full | In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor |
| title_fullStr | In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor |
| title_full_unstemmed | In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor |
| title_short | In-situ synthesis of fluorine-free MXene/TiO2 composite for high-performance supercapacitor |
| title_sort | in situ synthesis of fluorine free mxene tio2 composite for high performance supercapacitor |
| topic | MXene Fluorine-free TiO2 In-situ Synthesis Supercapacitor |
| url | http://www.sciencedirect.com/science/article/pii/S1878535223010134 |
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