Double metal MOF-based composite structure and performance as supercapacitor electrode

doi:10.12028/j.issn.2095-4239.2018.0024

Abstract

Abstract: Supercapacitor has been recently evaluated as a new type of energy storage device because of its high energy density and the rapid charge/discharge.The niccolite-type MOF compound was synthesized by a facile solvothermal method. By thermal treatment at 800℃, the precursor FeMn-MOF was calcinated to the complex structure C-MOF. FTIR Spectroscopy, XRD and SEM were used to characterize the structure of samples. The electrochemical properties of the supercapacitor applying C-MOF as the electrode material were measured. Results show that the specific capacitance of C-MOF electrode reaches 388.9 F·g^-1 at the current density of 0.5 A·g^-1. Furthermore, the capacitance retention is up to 201.5% after 5000 cycles at current density of 2 A·g^-1 compared with the initial specific capacitance. It indicates not only a good electrochemical stability but also an activation process of C-MOF electrode. This research not only broadens the application field of MOF material but also promotes the application value of MOF based composites as the electrode material of supercapacitor.

Key words: metal-organic framework, composite structure, supercapacitor

CLC Number:

TQ028.8

FU Yunjin, XIONG Chuangxi. Double metal MOF-based composite structure and performance as supercapacitor electrode[J]. Energy Storage Science and Technology, 2018, 7(3): 495-501.

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