Reduced graphene oxide decorated on MnO₂nanoflakes grown on C/TiO₂nanowire arrays for electrochemical energy storage

Abstract

In this work, RGO is decorated on MnO2 nanoflakes, which are electrochemically deposited on preformed C/TiO2 shell/core nanowire arrays to form a RGO/MnO2/C/TiO2 shell/core array electrode.

Effect of Concentration on the Charge Storage Kinetics of Nanostructured MnO2 Thin-Film Supercapacitors Synthesized by the Hydrothermal Method

“…The variation of the specific capacitance with the current density in a MnO 2 /C/TiO 2 shell/core array electrode was studied. The specific capacitance was found to be 539.2 Fg −1 at 2 Ag −1 , 280.9 Fg −1 at 10 Ag −1 , and 223.7 Fg −1 at 20 Ag −1 , respectively [65].…”

Ultrafine MnO2nanowires grown on RGO-coated carbon cloth as a binder-free and flexible supercapacitor electrode with high performance

“…[15][16][17][18] Therefore, in order to overcome these shortcomings, researchers are trying to develop new morphology and structure to increase their specic surface area. [19][20][21] So far there is a vast literature of supercapacitive MnO 2 in which capacitance values close to the theoretical quantity of 1370 F g À1 have been reported. 11,16,22 However, most of these studies utilized a rather thin MnO 2 lm with mass loadings less than 0.5 mg cm À2 .…”

“…However, no redox peaks are found in the CV curve, which is consistent with the electrochemical behavior of Mn-based electrode materials in neutral electrolytes. In this system, the main redox reaction equation is: 19,37 MnO 2 + Na + + e − ↔ MnOONa …”

“… 15–18 Therefore, in order to overcome these shortcomings, researchers are trying to develop new morphology and structure to increase their specific surface area. 19–21 …”

Fabrication of a snail shell-like structured MnO2@CoNiO2 composite electrode for high performance supercapacitors

“…Electrochemical impedance spectroscopy (EIS) was conducted over a frequency region from 0.1 Hz to 500 kHz. The specic capacitance (C s , F g À1 ), energy density (E, W h kg À1 ), and power density (P, W kg À1 ) were calculated from the galvanostatic charge-discharge curves using the following equations: 66,67…”