Hierarchical Co3O4@ZnWO4 core/shell nanostructures on nickel foam: Synthesis and electrochemical performance for supercapacitors |
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| Affiliation: | 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China;2. National Engineering Research Centre for Magnesium Alloys, Chongqing 400030, China;3. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;1. Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science & Engineering, Shaanxi Normal University, Xi’an, 710062, China;2. School of Science, Xi’an Technological University, Xi’an, 710032, China;3. Dalian Institute of Chemical Physics, National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian, 116023, China;1. School of Physics and Electronics, Hunan University, Changsha 410082, PR China;2. College of Physical Science and Technology, College of Economics and Management, Yichun University, Yichun 336000, PR China;3. Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, United States;4. 2D Material Technology Company Limited, Wing Lok Street, Sheung Wan, Hong Kong 999077, PR China;1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang, Liaoning, 110819, China;2. Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China;3. Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0044, Japan;1. Department of Energy Science, Alagappa University, Karaikudi, Tamil Nadu 630003, India;2. Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Kitakyushu, Fukuoka 808-0196, Japan;1. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;2. The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, China;3. College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China;1. School of Electronic Information Engineering, Yangtze Normal University, Fuling, Chongqing, 408100, PR China;2. School of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, 408100, PR China |
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| Abstract: | To improve the electrochemical properties of Co3O4 for supercapacitors application, a hierarchical Co3O4@ZnWO4 core/shell nanowire arrays (NWAs) material is designed and synthesized successfully via a facile two-step hydrothermal method followed by the heat treatment. Co3O4@ZnWO4 NWAs exhibits excellent electrochemical performances with areal capacitance of 4.1 F cm−2 (1020.1 F g−1) at a current density of 2 mA cm−2 and extremely good cycling stability (99.7% of the initial capacitance remained even after 3000 cycles). Compared with pure Co3O4 electrodes, the results prove that this unique hierarchical hybrid nanostructure and reasonable assembling of two electrochemical pseudocapacitor materials are more advantageous to enhance the electrochemical performance. Considering these remarkable capacitive behaviors, the hierarchical Co3O4@ZnWO4 core/shell NWAs nanostructure electrode can be revealed promising for high-performance supercapacitors. |
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| Keywords: | Supercapacitors Nickel foam Hierarchical structure |
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