A high-performance supercapacitor electrode based on freestanding N-doped Ti3C2Tx film |
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| Affiliation: | 1. Department of Electrical and Electronic Engineering, Xi’an Jiaotong-Liverpool University, Suzhou, Jiangsu 215123, PR China;2. Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, United Kingdom;3. Department of Chemistry, Xi’an Jiaotong-Liverpool University, Suzhou, Jiangsu 215123, PR China;4. Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom;5. School of Intelligent Manufacturing Ecosystem, Xi’an Jiaotong-Liverpool University, Suzhou Jiangsu, 215123, PR China;6. School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China;1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, PR China;2. Research Institute of Chemical Defence, Beijing 102205, PR China;3. School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia;1. Electronic Materials Research Laboratory, International Center for Dielectric Research, Key Laboratory of the Ministry of Education, Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic Science & Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, People’s Republic of China;2. Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, People’s Republic of China |
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| Abstract: | Two-dimensional transition metal carbide (MXene) is a promising electrode material for supercapacitors because of its excellent electrochemical properties. Here, we report a controllable and facile strategy to prepare a freestanding and flexible N-doped Ti3C2Tx (N–Ti3C2Tx) film electrode with a hydrothermal method using hydrazine hydrate (N2H4?H2O) as a nitrogen source. At a scan rate of 2 mV s?1, the N–Ti3C2Tx film electrode exhibits a high specific capacitance of 340 F g?1 and no capacitance degradation after 10,000 cycles in 1 M H2SO4 electrolyte. These results show that the N–Ti3C2Tx film could be used as an outstanding electrode material for high-performance supercapacitors. The operation of hydrazine treatment provides a more practical and convenient experimental method for N-doping. |
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| Keywords: | N-doping Freestanding Electrodes |
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