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Facile Electrodeposition Technique for the Fabrication of MoP Cathode for Supercapacitor Application
( Prakas Samanta ),( Souvik Ghosh ),( Naresh Chandra Murmu ),( Joong Hee Lee ),( Tapas Kuila ) 한국복합재료학회 2021 Composites research Vol.34 No.6
The continued environmental pollution caused by fossil fuel consumption has prompted researchers around the world to develop environmentally friendly energy technologies. Electrochemical energy storage is the significant area of research in this development process, and the research significance of supercapacitors in this field is increasing. Herein, a simple electrodeposition synthetic route was explored to develop the MoP layered cathode material. The layered structure provided a highly ion-accessible surface for smooth and faster ion adsorption/ desorption. After Fe was doped into MoP, the morphology of MoP changes and the electrochemical performance was significantly improved. Specific capacitance value of the binder-free FeMoP electrode was found to be 269 F g<sup>-1</sup> at 2 A g<sup>-1</sup> current density in 6 M aqueous KOH electrolyte. After adding Fe to MoP, an additional redox contribution was observed in the redox conversion from Fe<sup>3+</sup> to Fe<sup>2+</sup> redox pair, and the charge transfer kinetics of MoP was effectively improved. This research can provide guidance for the development of supercapacitor electrode materials through simple electrodeposition technology.
Souvik Ghosh,Prakas Samanta,Naresh Chandra Murmu,김남훈,Tapas Kuila 한국복합재료학회 2022 Composites research Vol.35 No.1
The activated carbon is a very good choice for using as supercapacitor electrode materials. Herein, the flower of Shorea robusta a bio-waste material was successfully used to synthesize the activated carbons for application as electrode materials of supercapacitor. The activated carbon was synthesized through chemical activation process followed by thermal treatment at 700oC in presence of N2 atmosphere using KOH, ZnCl2 and H3PO4 as the activating agents. The physicochemical analyses demonstrate that the obtained activated carbons are graphitic in nature and the degree of disorder of the graphitic carbons is changed with changing the activating agents. The activated carbon obtained from Shorea robusta flower (ACSF-K) electrode shows the specific capacitance of ~610 F g-1 at 2 A g-1 current density, which is higher than ACSF-Z (560 F g-1) and ACSF-H (470 F g-1) electrode material under the identical current density. The synthesized graphitic carbons also demonstrate good rate capability and high electrochemical stability as supercapacitor electrode.