| publication name | Nonconventional synthesis of polyhedral Mn3O4 nanoarchitectures incorporated reduced graphene oxide: superior supercapacitor capabilities |
|---|---|
| Authors | Mohamed Mokhtar Mohamed a,**, M. Khairy b,c,*, Ahmed A. Amer b, M.A. Mousa |
| year | 2022 |
| keywords | |
| journal | j o u r n a l of ma t e r i a l s r e s e a r c h and technology |
| volume | 21 |
| issue | Not Available |
| pages | 2555-2570 |
| publisher | Elsevier |
| Local/International | International |
| Paper Link | Not Available |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
Mn3O4/graphene nanocomposites with different ratios (M1G1, M1G3 and M3G1) were successfully synthesized by a deposition-solvothermal process. The composites were well characterized with different tools such as TEM-SAED, XRD, FTIR, Raman techniques, and N2 adsorption. The electrochemical characteristics of the nanocomposites were evaluated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and impedance spectroscopy in comparison to pure Mn3O4. Mn3O4 nanoarchitectures (15 nm) and their interaction with graphene, indicating the well-dispersion of Mn3O4 in graphene, were confirmed via TEM-SAED. The M3G1 composite, which contains mostly Mn3O4 and Mn2O3 moieties, has the largest specific capacitance of 490 F g-1 at current density of 0.25 A g-1, the highest power density of 2412 W kg1, a considerable energy density of 45 Wh kg1, and exceptional cycling stability of 0% loss after 1000 cycles. The quick charge diffusion mechanism, high surface area, and pore volume were all influencing factors.