Facile Synthesis of ZIFs-derived Hollow Bimetal (Zn,Co)S Nanocrystals for Supercapacitors

doi:10.7503/cjcu20170122

Abstract

Abstract:

A simple two-step method was introduced to synthesize uniform and hollow (Zn,Co)S nanostructures. Firstly, the bimetal compound ZIF-Zn,Co(ZIF=zeolitic imidazolate frameworks) with metal ions(Zn²⁺ and Co²⁺) and ligand(2-methylimidazole) was obtained using deionized water as solvent, hexadecyltrimethylammonium bromide(CTAB) as capping agent under stirring at room temperature. Secondy, hollow (Zn,Co)S nanostructures were synthesized by selecting ZIF-Zn,Co as self-sacrificial template and adding thioacetamide(TAA) as sulfate source under the microwave-assisted heating condition. The electrochemical measurements show that the specific capacitance of the as-made hollow (Zn,Co)S nanostructures was 423.3 F/g at current density of 3 mA/cm² and 57% capacitance remains after 2000 cycles at a current density of 10 mA/cm². With the advantages of unique properties, such as high surface area and good electrochemical performance, the as-made hollow (Zn,Co)S nanostructures have great potential as electrode material for supercapacitors.

Key words: Zeolitic imidazolate frameworks(ZIFs), Bimetal, Hollow nanostructure, Sulfide, Supercapacitor

CLC Number:

O614

TrendMD:

CHENG Wei, CHEN Cailing, YU Ying, LI Chunguang, GAO Lu, SHI Zhan. Facile Synthesis of ZIFs-derived Hollow Bimetal (Zn,Co)S Nanocrystals for Supercapacitors[J]. Chem. J. Chinese Universities, 2017, 38(8): 1303.

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