Thitaree Pimklang, Anyarat Watthanaphanit, Worragamol Hemnon, Jedsada Sodtipinta, Gasidit Panomsuwan, Jidapa Chantaramethakul, Chakrit Sriprachuabwong, Chatwarin Poochai, Adisorn Tuantranont, Pasit Pakawatpanurut
        This research introduces a cleaner, faster, and more efficient method called the Solution Plasma Process (SPP) for creating advanced energy storage materials (rGO-MnO2 nanocomposites) used in supercapacitors. Unlike the traditional high-heat, time-consuming hydrothermal process (HTP) which often produces mixed materials, SPP works quickly at room temperature using plasma in water. This allows for precise control, selectively depositing a pure, high-performing form of manganese dioxide (δ-MnO2) onto reduced graphene oxide (rGO) without harsh chemicals. While the initial energy storage capacity of the SPP-made material (89.2 F g⁻¹) is comparable to the HTP version (92.5 F g⁻¹), its durability is significantly better. The SPP material retained 76.8% of its storage ability after 5000 charge cycles, compared to only 54.0% for the HTP material. Optimizing the water’s acidity (pH 10) during the SPP process further boosted performance. This work establishes SPP as a promising, environmentally friendly, and scalable alternative for manufacturing durable, high-performance components for next-generation energy storage, contributing to sustainable technology development.

Reference:
Pimklang, T., Watthanaphanit, A., Hemnon, W., Sodtipinta, J., Panomsuwan, G., Chantaramethakul, J., Sriprachuabwong, C., Poochai, C., Tuantranont, A., and Pakawatpanurut, P.* Selective phase control and enhanced electrochemical performance of rGO-MnO2 nanocomposites for supercapacitor electrodes via solution plasma process: a greener alternative to hydrothermal process. Materials Chemistry and Physics, 2025, 341:130948.