MnO2-directed synthesis of NiFe-LDH@FeOOH nanosheeet arrays for supercapacitor negative electrode |
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| Institution: | 1. Multi-scale Porous Materials Center, Institute of Advanced Interdisciplinary Studies, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;2. State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;2. National Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China;3. Department of Chemistry, Tongji University, Shanghai 200092, PR China;4. Chongqing Project Management Co. Ltd., Chongqing 400021, PR China;1. State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, PR China;2. Qiongtai Normal University, Haikou 571127, PR China;3. Department of Applied Chemistry, School of Science, Xi’an Jiaotong University, Xi’an 710049, PR China;4. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, PR China;1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, PR China;2. College of Science, China University of Petroleum, Qingdao 266580, PR China;3. Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, PR China;1. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, NSW 2522, Australia |
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| Abstract: | The complex-architectured NiFe-LDH@FeOOH negative material was first prepared by simple two-step hydrothermal method. In this study, the porous nanostructure of FeOOH nanosheets features a large number of accessible channels to electroactive sites and the two-dimensional layered structure of NiFe-LDH nanosheets have an open spatial structure with high specific surface area, which enhance the diffusion of ions in the active material. Benefited from above advantages, the excellent electrochemical properties were demonstrated. NiFe-LDH@FeOOH nanocomposites present high specific capacitance (1195 F/g at a current density of 1 A/g), lower resistance and well cycling performance (90.36% retention after 1000 cycles). Furthermore, the NiFe-LDH@MnO2//NiFe-LDH@FeOOH supercapacitor exhibits 22.68 Wh/kg energy density at 750 W/kg power density, demonstrating potential application in energy storage devices. |
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| Keywords: | NiFeLDH FeOOH Supercapacitor Negative electrode Electrochemical performance |
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