Porous and free-standing Ti_3C_2T_x-RGO film with ultrahigh gravimetric capacitance for supercapacitors |
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| Affiliation: | 1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;2. Teachers Education College of Harbin Normal University, Harbin 150001, China;3. Key Laboratory of Advanced Chemical Power Sources, Guizhou Meiling Power Sources Co., Ltd., Zunyi 563003, China;1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;1. Department of Chemistry & Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China;2. Key Laboratory of Superlight Materials and Surface Technology (Ministry of Education), College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;3. College of Mechanical and Electrical Engineering, Jiaxing University, Jiaxing 314001, China;1. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, China;3. International Innovation Center for Forest Chemicals and Materials, China;4. Jiangsu Engineering Research Center of Fast-growing Trees and Agri-fiber Materials, Nanjing 210037, China |
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| Abstract: | MXene-based electrode materials exhibit favorable supercapacitor performance in sulfuric acid due to praised pseudocapacitance charge storage mechanism.However,self-stacking of conventional MXene electrodes severely restricts their electrochemical performance,especially at high loading.Herein,a flexible cross-linked porous Ti_3C_2T_x-MXene-reduced graphene oxide(Ti_3C_2T_x-RGO) film is skillfully designed and synthesized by microscopic explosion of graphene oxide(GO) at sudden high te mperature.The generated chamber structure between layers could hold a few of electrolyte,leading to a close-fitting reaction at interlayer and avoiding complex ions transmission paths.The Ti_3C_2T_x-RGO film displayed a preferable rate performance than that of pure Ti_3C_2T_x film and a high capacitance of 505 F/g at 2 mV/s.Furthermore,the uniform intralayer structure and unique energy storage process lead to thicknessindependenct electrochemical performances.This work provides a simple and feasible improvement approach for the design of MXene-based electrodes,which can be spread other electrochemical systems limited by ions transport,such as metal ions batteries and catalysis. |
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| Keywords: | MXene RGO Cross-linked porous Supercapacitors High capacitance Thickness independent |
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