Binder-free engineering design of Ni-MOF ultrathin sheet-like grown on PANI@GO decorated nickel foam as an electrode for in hydrogen evolution reaction and asymmetric supercapacitor |
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| Affiliation: | 1. Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran;2. Department of Chemistry & Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA;3. Department of Chemical Engineering, Osmaniye Korkut Ata University, Osmaniye, Turkiye;4. TUBITAK Marmara Research Center, Material Institute, Gebze, 41470, Turkiye;1. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;2. Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun 130022, China;1. College of Physics and Electromechanical Engineering, Hubei University of Education, Wuhan 430205, PR China;2. Hubei Engineering Research Center for Safety Detection and Control of Hydrogen Energy - Hubei Key Laboratory of Ferro- & Piezo-electric Materials and Devices, School of Microelectronics, Hubei University, Wuhan 430062, PR China;3. School of Chemistry and Environmental Engineering, Wuhan University of Bioengineering, Wuhan 430415, PR China;1. Khristianovich Institute of Theoretical and Applied Mechanics of SB RAS, 630090, Novosibirsk-90, Institutskaya Str. 4/1, Russian Federation;2. Voevodsky Institute of Chemical Kinetics and Combustion of SB RAS, 630090, Novosibirsk-90, Institutskaya Str. 3, Russian Federation;3. Novosibirsk State University, Novosibirsk-90, Pirogov Str. 2, 630090, Russian Federation;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, China;2. Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing, 400030, China |
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| Abstract: | In this study, Ni3(benzene 1,3,5-tricarboxylic acid)@polyaniline-rGO nanocomposite (Ni-MOF@PANI-rGO) is fabricated by a two-step procedure involving polymerization and hydrothermal operations. This nanocomposite-based Ni-MOF was designed for binder-free surface modification of nickel foam (NF). This is offered a novel approach for enhancing the electrochemical performance, and even energy density with a wider operating potential window. An in-situ Ni-MOF was then synthesized on polyaniline@GO (PANI-GO) using an NH-fragment linker and an in-situ hydrothermal technique. The electrochemical behavior of the nanocomposite was studied in asymmetric systems and exhibited outstanding electrochemical performance, high energy density, and power density (73.99 Wh kg?1 at 848.29 W kg?1). The electrode also showed a high specific capacity (1680 C g?1 at 1.0 A g?1) and exceptional cycling stability (92?) after 5000 cycles in a three-electrode system. The present results imply a direct application of Ni-MOF@PANI-rGO composite as a bridge performance between supercapacitors and batteries. In addition, the electrocatalyst activity of Ni-MOF@PANI-rGO toward hydrogen evolution reaction (HER) was investigated by linear sweep voltammetry at a scan rate of 10 mV s?1 in 1.0 M KOH. The results showed that Ni-MOF@PAN-rGO acts as a suitable electrocatalyst with the lowest overpotential at 10, 50, and 80 mA cm?2 and the lowest Tafel slope. |
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| Keywords: | In-situ binder-free synthesis PANI-GO hollow nanotubes Open pores Ni- MOF Battery-type supercapacitor Hydrogen evolution |
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