Low-Temperature Activation of MOF-74 Composite-Derived Materials for Supercapacitors

Graphene-like materials are currently showing great potential in different fields, especially in energy storage. We synthesized N-GLC/MOF-74 composites by combining nitrogen-doped graphene-like carbon (N-GLC) with MOF-74. Three porous N-GLC/metal oxide complexes (A-1, A-2, and A-3) were successfully synthesized by calcining the synthesized composites at different temperatures (300°C, 400°C, and 500°C) under air atmosphere. The conversion of the MOF into metal oxides under high-temperature conditions and the oxidation of N-GLC into porous structures was revealed by characterization. The coulombic efficiency of A-1 reached 97.7% after 3500 long cycles at 5 A g⁻¹, indicating an improvement in the stability of the material. The results of this work support the potential use of graphene-like derivatives in energy storage applications.