MWCNTs-GONRs/Co3O4 electrode with needle-like arrays for outstanding supercapacitors |
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| Affiliation: | 1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;2. Hebei United University, Tangshan 063009, China;1. School of Science, Minzu University of China, Beijing 100081, China;2. Faculty of Sciences, Ningbo University, 4, Zhejiang, Ningbo 315211, China;1. Jiangsu Key Laboratory of Pesticide Sciences, Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, PR China;2. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, PR China;3. State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093, PR China;1. School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, PR China;2. Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore, 54000, Pakistan;3. College of Chemical Engineering, Huanggang Normal University, Huanggang, 438000, PR China;4. Departamento de Quimica Organica, Universidad de Cordoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, E14014 Cordoba, Spain;5. Metallurgy & Materials Engineering Department, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan;6. College of Electrical Engineering, Sichuan University, Chengdu, 610065, PR China;7. Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia;8. Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, 11671, Saudi Arabia;1. Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China;2. Department of Materials Science and Engineering, National University of Singapore 117574, Singapore;3. Beijing Smart-Chip Microelectronics Technology Co., Ltd., Beijing 100192, China |
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| Abstract: | Multiwalled carbon nanotubes-graphene oxide nanoribbons (MWCNTs-GONRs) exhibit high specific surface area and good electroconductivity because of their unique three-dimensional cross-linking structure with the properties of both CNTs and GONRs. In this study, a hydrothermal method was employed to anchor MWCNTs–GONRs onto a Ni foam (NF) to obtain a precursor substrate. Subsequently, Co3O4 arrays were grown on the NF substrate to synthesize a MWCNTs–GONR/Co3O4 electrode. The electrode showed a capacitance of 846.2 F g?1 at 1 A g?1 and a capacitance retention of 90.1% after 3000 cycles. Furthermore, MWCNTs–GONRs/Co3O4 and active carbon (AC) were used as the positive and negative electrodes, respectively, to assemble a supercapacitor, which delivered a maximum energy density of 38.23 W h kg?1 and a high power density of 6.80 kW kg?1. In addition, the specific capacitance of the device reached a maximum of 91.5% after 9000 cycles. Thus, the MWCNTs–GONRs/Co3O4 electrode showed huge potential for supercapacitor applications. |
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| Keywords: | MWCNTs-GONRs Electrochemical performance Supercapacitors |
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