Rapid Production of Mn3O4/rGO as an Efficient Electrode Material for Supercapacitor by Flame Plasma

Abstract

Benefiting from good ion accessibility and high electrical conductivity, graphene-based material as electrodes show promising electrochemical performance in energy storage systems. In this study, a novel strategy is devised to prepare binder-free Mn3O4-reduced graphene oxide (Mn3O4/rGO) electrodes. Well-dispersed and homogeneous Mn3O4 nanosheets are grown on graphene layers through a facile chemical co-precipitation process and subsequent flame procedure. This obtained Mn3O4/rGO nanostructures exhibit excellent gravimetric specific capacitance of 342.5 F g−1 at current density of 1 A g−1 and remarkable cycling stability of 85.47% capacitance retention under 10,000 extreme charge/discharge cycles at large current density. Furthermore, an asymmetric supercapacitor assembled using Mn3O4/rGO and activated graphene (AG) delivers a high energy density of 27.41 Wh kg−1 and a maximum power density of 8 kW kg−1. The material synthesis strategy presented in this study is facile, rapid and simple, which would give an insight into potential strategies for large-scale applications of metal oxide/graphene and hold tremendous promise for power storage applications.

Performance enhancement of asymmetric supercapacitors with bud-like Cu-doped Mn3O4 hollow and porous structures on nickel foam as positive electrodes

“…The specic capacitance is calculated as 194.5 F g À1 at a scan rate of 5 mV s À1 and 133.3 F g À1 at 100 mV s À1 , which is comparable to the reported values of Mn 3 O 4 based electrodes in literature. [34][35][36] It keeps a comparable high specic capacitance retention even at high scan rate of 100 mV s À1 , showing a good electrochemical behavior of the device. The energy storage mechanism of Mn 3 O 4 electrode materials has been accepted as the proton-electron mechanism.…”

Electrochemical prospects and potential of hausmannite Mn 3 O 4 nanoparticles synthesized through microplasma discharge for supercapacitor applications

“…Suzuki et al 25 manufactured cubical Mn 3 O 4 nanoparticles via spray‐inductively coupled plasma technique in argon atmosphere on the mother solution manganese nitrate with a maximum power of 15 kW. Zhou et al 26 fabricated Mn 3 O 4 /rGO nanosheets by flame plasma process via chemical coprecipitation method. They obtained 342.5 Fg −1 as the specific capacitance at a current density of 1 Ag −1 and 85.47% retention capacitance was retained for charge discharge cycles.…”

Design of a Sensitive Electrochemical Sensor Based on Ferrocene‐reduced Graphene Oxide/Mn‐spinel for Hydrazine Detection

“…Deconvoluted spectra of O 1s showed the peak at 528.3 corresponds to C=O; 529.6 (O 2− ), 640.0, 651.8 eV and splitting width (11.8 eV) were mainly attributed for 2p 3/2 and 2p 1/2 of Mn 3 O 4 [8c] (Figure 3c and 3d). Hence, it confirmed the covalent interactions in Fc−G and its association with Mn 3 O 4 .…”