Bimetallic zeolitic imidazolate frameworks for symmetric electrical double-layer supercapacitors with aqueous electrolytes

초록

We have investigated a facile synthesis of nanoporous carbon using a bimetallic (Co2+ and Zn2+) zeolitic imidazolate framework (ZIF) as a precursor. The properties of the as-prepared bimetallic ZIF-derived carbon, including the specific surface area, porosity, and degree of graphitization, are precisely controlled. This material has been directly applied in a symmetric electrical double-layer supercapacitor (EDLC). The specific capacitance of the symmetric EDLC is estimated to be 10.5 F.g(-1) at a high current density of 10 A.g(-1) in 0.5 M sulfuric acid. (C) 2017 Elsevier B.V. All rights reserved.

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