Hollow Co3O4@MnO2 Cubic Derived From ZIF-67@Mn-ZIF as Electrode Materials for Supercapacitors

Abstract

Hollow Co 3 O 4 @MnO 2 cubic nanomaterials are synthesized by ZIF-67@Mn-ZIF sacrificial precursor through a facile thermal treatment. As a kind of supercapacitor electrode material, it demonstrates high performances, such as specific capacitance of 413 F g −1 at the current density of 0.5 A g −1 ; as the current densities raised from 0.5 to 10 A g −1 (20 times increasing), there is still ∼41% retention of its initial capacitance. These satisfactory electrochemical properties should be put down to the hollow and porous structure and the relative higher BET surface area, which supplies more reactive sites for charge and discharge processes.

Mesoporous carbon‐supported CO 3 O 4 derived from Zif‐67 metal organic framework (MOF) for hydrogen evolution reaction in acidic and alkaline medium

“…3 Co 3 O 4 /MnO 2 nanostructure from ZIF-67 MOF has been exploited for supercapacitor applications to give 413 F/g specific capacitance at a current density of 0.5 A/g, and the material had a surface area of 148 m 2 /g. 4 Co 3 O 4 /ZnO derived from ZIF-67 is used as electrodes for supercapacitors, which gave 415 F/g at 0.5 A/g. 5 Co 3 O 4 @CdS derived from ZIF-67 was used as a catalyst for phenol degradation with an efficiency of more than 80% with a surface area of 75.63 m2/g.…”

Introducing mesoporous silica-protected calcination for improving the electrochemical performance of Cu@Fe–N–C composites in oxygen reduction reactions and supercapacitor applications

“…79,80 Likewise, more active sites are provided that may be useful for electrolyte ion storage and prepare more and faster electron transfer pathways, thus leading to improved electrochemical performance. 81,82 Fig. 4 The Raman spectra of the fabricated electrocatalysts.…”

Trimetallic Oxides/GO Composites Optimized with Carbon Ions Radiations for Supercapacitive Electrodes

“…Among the techniques for modifying the electrochemical properties of metal oxides, the formation of mixed oxides, incorporation of a conductive matrix, and irradiation of the active materials have effectively optimized the energy storage capabilities of transition metal oxides. Jiani et al [31], synthesized Co 3 O 4 @MnO 2 cubic nanomaterials by ZIF-67@Mn-ZIF precursor applying a facile thermal treatment. The Co 3 O 4 @MnO 2 electrode offered high electrochemical properties with a specific capacitance of 413 F/g at a current density of 0.5 A/g.…”