Preparation and electrochemical performance of the novel porous cobalt-nickel-zinc oxides/carbon nanocomposites

doi:10.3969/j.issn.2095-4239.2014.06.007

Abstract

Abstract: Metal-organic frameworks (MOF-5) as template and the sources of carbon and zinc, the cobalt-nickel-zinc oxides/carbon nanocomposites have been synthesized by impregnation method following by a calcinations procedure. The microstructure and morphology of Co-Ni-Zn oxides/C composite are characterized by XRD,SEM,EDS and nitrogen adsorption/desorption experiment. The result shows that the Co-Ni-Zn oxides/C composites display a porous structure with a specific surface area of 155 m²/g. The electrochemical performances are investigated by CV, galvanostatic charge-discharge tests and EIS. The specific capacitance of as-prepared porous Co-Ni-Zn oxides/C composites is 804 F/g at 1 A/g with the retention ratio of 94.4% after 1000 cycles, which is much higher than that of Co-Ni oxides (180 F/g). The high rate discharge (HRD) for porous Co-Ni-Zn oxides/C composites reaches to 90% at 10 A/g.

Key words: cobalt-nickel-zinc oxides/carbon composites, MOF-5, template method, supercapacitors

CLC Number:

TM53

ZHANG Shuirong, LIU Kaiyu, YI Xiaoyi, HE Fang, XIE Qingliang. Preparation and electrochemical performance of the novel porous cobalt-nickel-zinc oxides/carbon nanocomposites[J]. Energy Storage Science and Technology, 2014, 3(6): 607-613.

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