Microwave synthesis of ZIF-67 derived nickel-cobalt hydroxide and its electrochemical performance

WANG Miao; FENG Yu; ZHANG Yan; WU Meng-meng; ZHAO Jia-hui; MI Jie

doi:10.19906/j.cnki.JFCT.2022026

Volume 50 Issue 9

Oct. 2022

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Article Navigation > Journal of Fuel Chemistry and Technology > 2022 > 50(9): 1175-1182

WANG Miao, FENG Yu, ZHANG Yan, WU Meng-meng, ZHAO Jia-hui, MI Jie. Microwave synthesis of ZIF-67 derived nickel-cobalt hydroxide and its electrochemical performance[J]. Journal of Fuel Chemistry and Technology, 2022, 50(9): 1175-1182. doi: 10.19906/j.cnki.JFCT.2022026

Citation:

WANG Miao, FENG Yu, ZHANG Yan, WU Meng-meng, ZHAO Jia-hui, MI Jie. Microwave synthesis of ZIF-67 derived nickel-cobalt hydroxide and its electrochemical performance[J]. Journal of Fuel Chemistry and Technology, 2022, 50(9): 1175-1182. doi: 10.19906/j.cnki.JFCT.2022026

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Microwave synthesis of ZIF-67 derived nickel-cobalt hydroxide and its electrochemical performance

doi: 10.19906/j.cnki.JFCT.2022026

WANG Miao^{1, 2
,},
FENG Yu^{1, 2
,
,},
ZHANG Yan^{1, 2},
WU Meng-meng^{1, 2},
ZHAO Jia-hui^{1, 2},
MI Jie^{1, 2
,
,}

1.
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
2.
Key Laboratory of Coal Science and Technology, Taiyuan 030024, China

Funds: The project was supported by the Major Projects of Shanxi Province (MC2015-04).

Received Date: 2022-02-17
Accepted Date: 2022-03-28
Rev Recd Date: 2022-03-21

Available Online: 2022-04-27

Publish Date: 2022-10-21

Abstract

Abstract

Microwave-assisted heating method was used to rapidly prepare three-dimensional hollow nickel-cobalt hydroxide (Ni-Co LDH) by using zeolite dimethyl imidazolium cobalt (ZIF-67) as template and cobalt source. The effect of microwave reaction time on the morphology and electrochemical properties of the materials was investigated. X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and specific surface and aperture analyzer (BET) were used to investigate the effect of microwave reaction time on the structure and morphology of the samples. The electrochemical properties of Ni-Co LDH electrode materials were analyzed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). The results showed that the electrochemical properties of Ni-Co LDH-15 min electrode were the best. The specific capacitance was 2371.0 F/g at 0.5 A/g. The Ni-Co LDH-15 min also possessed excellent capacity retention of 78.5% when the current density increased by 20 times. An asymmetric supercapacitor (Ni-Co LDH//AC) was assembled by using Ni-Co LDH as the positive electrode and AC as the negative electrode. The Ni-Co LDH//AC device delivered a high energy density of 19.17 W·h/kg at the power density of 448.05 W/kg. Furthermore, the capacitance retention rate still maintained 88.7% after 5000 cycles. These results showed that Ni-Co LDH was a kind of electrode material for supercapacitor with excellent electrochemical performance and practical application potential.
- nickel-cobalt hydroxide,
- cubic imidazolate frameworks,
- microwave method,
- electrochemistry,
- supercapacitors

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References(18)

References

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