Using metal–organic frameworks to create carbon-encased Ni@Ni(OH)2 for high-performance supercapacitors
Wang J. Pan X. Peng P. Wu S. Xu G. Xie J. Supiyeva Z. Liu Q.
May 2024Springer Science and Business Media B.V.
Journal of Nanoparticle Research
2024#26Issue 5
Developing a high-performance anode and cathode for a supercapacitor that simultaneously has a high specific capacitance and a high energy density is a difficult task. Pyrolysis of Ni-MOF is used in this study to build Ni–C nanoparticles with a porosity that can be tuned and a high surface area. A straightforward acid treatment can be used to produce an N-doped porous carbon anode and Ni(OH)2-coated Ni–C (Ni(OH)2-Ni-C) cathode, both of which are based on Ni–C. The capacitance of the N-doped porous carbon anode is three times that of the Ni–C nanoparticle. This is because the N-doped porous carbon anode inherited the porous structure of the Ni–C nanoparticle, and it also included more carbon. The Ni(OH)2-Ni-C cathode also demonstrates suitable capacitance and rate performance. This is because of the synergistic effect of the ultrathin nano-active layer and the Ni nanoparticles for high-rate discharge ability, which is supplied by the cathode’s distinctive core–shell structure. The manufactured asymmetric supercapacitor, which uses the cathode and anode described in the previous sentence, demonstrates outstanding capacitive performance and significant reversibility. The capacitor has an energy density of 49.7 Wh kg−1 when the current is 2 A g−1. The porous structure, adequate conductivity, and the one-of-a-kind Ni(OH)2 ultrathin nano-active layer contribute to the material’s great performance. The straightforward yet effective design procedure will be useful for the application of MOF in the field of energy storage, which includes fields like batteries and supercapacitors.
Anode , Cathode , Metal–organic frameworks , Ni(OH)2 , Supercapacitors
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Zhongshan Polytechnic, Zhongshan, 528400, China
Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, Poznan, 60-965, Poland
School of Energy Science and Technology, Henan University, Kaifeng, 475004, China
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 71 Al-Farabi Ave, Almaty, 050040, Kazakhstan
Zhongshan Power Supply Bureau of Guangdong Power Grid Co., Ltd., China Southern Power Grid, Zhongshan, 528405, China
Zhongshan Polytechnic
Institute of Chemistry and Technical Electrochemistry
School of Energy Science and Technology
Faculty of Chemistry and Chemical Technology
Zhongshan Power Supply Bureau of Guangdong Power Grid Co.
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