Selective phase control and enhanced electrochemical performance of rGO-MnO<inf>2</inf> nanocomposites for supercapacitor electrodes via solution plasma process: A greener alternative to hydrothermal process
Issued Date
2025-09-01
Resource Type
ISSN
02540584
Scopus ID
2-s2.0-105003698966
Journal Title
Materials Chemistry and Physics
Volume
341
Rights Holder(s)
SCOPUS
Bibliographic Citation
Materials Chemistry and Physics Vol.341 (2025)
Suggested Citation
Pimklang T., Watthanaphanit A., Hemnon W., Sodtipinta J., Panomsuwan G., Chantaramethakul J., Sriprachuabwong C., Poochai C., Tuantranont A., Pakawatpanurut P. Selective phase control and enhanced electrochemical performance of rGO-MnO<inf>2</inf> nanocomposites for supercapacitor electrodes via solution plasma process: A greener alternative to hydrothermal process. Materials Chemistry and Physics Vol.341 (2025). doi:10.1016/j.matchemphys.2025.130948 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/110017
Title
Selective phase control and enhanced electrochemical performance of rGO-MnO<inf>2</inf> nanocomposites for supercapacitor electrodes via solution plasma process: A greener alternative to hydrothermal process
Corresponding Author(s)
Other Contributor(s)
Abstract
This study introduces a greener and scalable solution plasma process (SPP) for synthesizing reduced graphene oxide–manganese dioxide (rGO-MnO2) nanocomposites with precise phase control, offering a novel alternative to conventional hydrothermal processes (HTP). Unlike HTP, which typically produces mixed-phase manganese oxides, SPP enables the selective deposition of pure δ-MnO2 onto rGO surfaces using potassium permanganate (KMnO4) in an aqueous system. Additionally, rGO is prepared without toxic reductants, enhancing the sustainability of the process. Electrochemical evaluations reveal that SPP-derived rGO-MnO2 (SPP-rGOM) achieves a specific capacitance of 89.2 F g−1, comparable to HTP-rGOM (92.5 F g−1), while demonstrating significantly superior cycling stability—retaining 76.8 % of its capacitance after prolonged cycling compared to 54.0 % for HTP-rGOM at 30 mV s−1. These findings establish SPP as an innovative, environmentally friendly approach for the scalable production of durable, high-performance electrode materials for energy storage applications.