Novel electrodeposition of bud-like cobalt/zinc metal-organic-framework onto nickel foam as a high-performance binder-free electrode material for supercapacitor applications

•Bud-like CoZn-bdc structure was grown onto nickel foam by reductive deposition.•High specific capacitance of 1205 F g–1 was achieved at 2 A g–1.•94.8 % capacity retention was observed after 8000 cycles at 2 A g–1. In this paper, bimetal-terephthalate (i.e. CoZn-bdc) metal-organic-framework (MOF) st...

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Bibliographic Details
Published in:Materials letters 2022-07, Vol.319, p.132282, Article 132282
Main Authors: Salehi, S., Ehsani, M.H., Aghazadeh, M.
Format: Article
Language:English
Subjects:
Bimetals
Electrode materials
Electrodeposition
Electrodes
Energy storage and conversion
Fourier transforms
Infrared analysis
Infrared spectroscopy
Materials science
Metal foams
Metal-organic frameworks
Microstructure
Nickel
Porous materials
Spectrum analysis
Substrates
Supercapacitors
X ray powder diffraction
Zinc
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Summary:•Bud-like CoZn-bdc structure was grown onto nickel foam by reductive deposition.•High specific capacitance of 1205 F g–1 was achieved at 2 A g–1.•94.8 % capacity retention was observed after 8000 cycles at 2 A g–1. In this paper, bimetal-terephthalate (i.e. CoZn-bdc) metal-organic-framework (MOF) structures with bud-like morphology are grown onto nickel foam by a one-step reductive electrochemical procedure, which are used as electrode active materials for supercapacitor. The synthesized CoZn-bdc material is characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy analyzes. The acquired results verified the formation of the bud-like MOF structures with mixed metallic centers (i.e. 3.89% Co and 3.07 % Zn) onto Ni-foam substrate. Electrochemical performances of the CoZn-bdc/Ni foam were also investigated by galvanostatic charge-discharge (GCD) tests, which exhibited high specific capacitance of 1205 F g–1 and 94.8 % capacity retention after 8000 cycling at 2 A g–1. Finally, the as-prepared samples are found to be of great potential as a high-performance electrode active material for electrochemical supercapacitors.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2022.132282