Nitrogen Calcination of MOF-74 Composite-Derived Materials for Enhanced Supercapacitor Performance

Abstract

Graphene-like materials are currently showing great potential in different fields, especially in energy storage. We synthesized N-GLC/MOF-74 by compositing nitrogen-doped graphene-like carbon (N-GLC) with MOF-74. A series of porous N-GLC/metal monolithic complexes (N-1, N-2, and N-3) were successfully synthesized by calcining the synthesized composites at different temperatures (300 °C, 400 °C, and 500 °C) under a nitrogen atmosphere. Characterization shows that the MOF is converted to metal monomers at high temperatures, whereas N-GLC does not change significantly. The Coulombic efficiency of N-1 reaches 97.3% after 4000 long cycles at 5 A g −1 , indicating an improvement in the stability of the material. This work provides implications for the potential application of graphene-like derivatives in energy storage.