High nitrogen-doped carbon/Mn₃O₄hybrids synthesized from nitrogen-rich coordination polymer particles as supercapacitor electrodes

Abstract

High nitrogen-doped carbon/Mn3O4 composites were synthesized by annealing nitrogen-rich Mn-based coordination polymer particles, and investigated by electron microscopy, X-ray diffraction, and electrochemical experiments. To assess the performance of high nitrogen-doped hybrids as electrode materials in supercapacitors, cyclic voltammetry and galvanostatic charging-discharging measurements are performed. High nitrogen-doped carbon/Mn3O4 composites are charged and discharged faster and have higher capacitance than carbon/Mn3O4 nanostructures with low nitrogen amounts and other reported ones. The capacitance of the high nitrogen-doped carbon/Mn3O4 is 94% retained after 1000 cycles at a constant current. These improvements can be attributed to the nitrogen-doped carbon matrix, which promotes fast Faradaic charging and discharging of the Mn3O4 motifs. The nitrogen-doped carbon/Mn3O4 composites could be a promising candidate material for a high-capacity, low-cost, and environmentally friendly electrode for supercapacitors.

Mn3 O4 nanoparticles on activated carbonitride by soft chemical method for symmetric coin cell supercapacitors

“…According to the above discussion, the electrochemical properties of MONC-90 compared with Mn 3 O 4 monomer and other reported electrodes are greatly improved, as shown in Table 2. [32][33][34][35] In order to further study the practical application of the prepared MONC electrode, a symmetrical coin cell (SCC) was assembled using MONC-90 as electrodes and placing them face-to-face. The structure is shown in Figure S3.…”

Coordination polymer template synthesis of hierarchical MnCo2O4.5 and MnNi6O8 nanoparticles for electrochemical capacitors electrode

“…According to the previous experience on synthesizing the coordination polymer particles, when the concentration of reactants was much higher, more nuclei could generate within a shorter time [21,22]. Besides plenty of nuclei could grow slowly, which would restrain the occurrence of good crystallinity.…”

Mn3O4 hollow microcubes and solid nanospheres derived from a metal formate framework for electrochemical capacitor applications

“…We compared the electrochemical performance of Mn 3 O 4 hollow microcubes and solid nanospheres with the reported Mn 3 O 4 based electrode materials especially taking into consideration the existence of additional carbon modications, which are listed in Table S1. † [42][43][44][45][46] The comparison further suggests that the Mn 3 O 4 hollow microcubes and solid nanospheres exhibit improved electrochemical performance with better capacitance and excellent cycling stability.…”