Electrochemical synthesis of Zn/Co-ZIF material and capacitive properties

ZHAO Xuejing; SUN Xiaojun; WEI Jinzhi; ZHANG Ting; LIU Xinran

doi:10.13801/j.cnki.fhclxb.20200831.001

Volume 38 Issue 5

May 2021

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ZHAO Xuejing, SUN Xiaojun, WEI Jinzhi, et al. Electrochemical synthesis of Zn/Co-ZIF material and capacitive properties[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1543-1550. doi: 10.13801/j.cnki.fhclxb.20200831.001

Citation:

ZHAO Xuejing, SUN Xiaojun, WEI Jinzhi, et al. Electrochemical synthesis of Zn/Co-ZIF material and capacitive properties[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1543-1550. doi: 10.13801/j.cnki.fhclxb.20200831.001

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Electrochemical synthesis of Zn/Co-ZIF material and capacitive properties

doi: 10.13801/j.cnki.fhclxb.20200831.001

College of Chemical and Enviromental Engineering, Harbin University of Science and Techology, Harbin 150080, China

Received Date: 2020-06-08
Accepted Date: 2020-08-18

Available Online: 2020-08-31

Publish Date: 2021-05-01

Abstract

Abstract

In-situ synthesis of bimetallic Zn/Co-zeolitic imidazolate frameworks (ZIF) was successfully achieved by electrochemical method. The optimal synthesis conditions of the Zn/Co-ZIF were explored by changing the reaction solvent ratio, the applied voltage and the amount of metal cobalt salt added. The results show that Zn/Co-ZIF with irregular layered particle structure is obtained under the conditions of the volume ratio of N,N-dimethylformamide (DMF) to ethanol (EtOH) is 1∶4, the applied voltage is 5 V, and the added metal cobalt salt is 0.08 g. The electrode was prepared with Zn/Co-ZIF as the active material for the study of supercapacitor performance, and compared with ZIF-8 synthesized in situ by electrochemical method under the same conditions. Capacitance performance was explored through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The results show that the CV curves of Zn/Co-ZIF electrode materials at different scanning speeds have a pair of redox peaks, which show obvious pseudo-capacitance characteristics. At a current density of 1 A/g, the specific capacitance of the Zn/Co-ZIF electrode material is 189 F/g, which is higher than that of the ZIF-8 electrode (72 F/g). After 2000 cycles, the specific capacitance value is still can maintain 90.5% of the initial value.
- electrochemical synthesis,
- electrode material,
- bimetal ZIF,
- supercapacitor,
- capacitance performance
Long Abstrsct
Innovation Points

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References(32)

References

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