Hydrothermal assisted <i>in situ</i> growth of CoSe onto graphene nanosheets as a nanohybrid positive electrode for asymmetric supercapacitors

Cobalt selenide–graphene (CoSe–G) nanohybrid was successfully synthesised by a one-pot hydrothermal method and used as a positive electrode for asymmetric supercapacitor, which provides an energy density of 45.5 W h kg−1 and a power density of 1.1 kW kg−1. </p

Facile synthesis of electrostatically anchored Nd(OH)₃ nanorods onto graphene nanosheets as a high capacitance electrode material for supercapacitors

Nd(OH)3/G hybrid is prepared by a solvothermal reduction process and used as an electrode material for asymmetric supercapacitors.</p

Hybrid of MoSe2-Ni(OH)2 nanosheets as efficient electrode material for high energy asymmetric supercapacitors

The talk presented at 29th Annual General Meeting Of Materials Research Society Of India And National Symposium On Advances In Functional And Exotic Materials.</p

Morphology restrained growth of V₂O₅ by the oxidation of V-MXenes as a fast diffusion controlled cathode material for aqueous zinc ion batteries

Restrained morphology and structural engineering of layered V2O5 by the oxidation of V-MXene to form a unique V2O5@V2C nanohybrids at different temperature and used as a cathode material for aqueous Zn-ion batteries (ZIBs).</p

Influence of pulse reverse current parameters on electrodeposition of copper-graphene nanocomposite coating

This work focuses on the influence of pulse reverse current parameters such as duty cycle and frequency on the microstructure and properties of graphene reinforced copper nanocomposite (Cu-Gr) coating. Graphene nanosheets were prepared by a liquid phase exfoliation technique and characterized using FE-SEM and Raman spectroscopy. Cu-Gr nanocomposite coating on stainless steel was prepared by pulse reverse electrodeposition method. The influence of pulse reverse current parameters such as duty cycle and frequency on the coating structure and texture was analyzed. By reducing the duty cycle and increasing frequency, a high amount of graphene co-deposition was achieved. A duty cycle of 40%, frequency of 1000 Hz and stirring speed of 500 rpm produced Cu-Gr coatings with maximum graphene codeposition. XRD analysis showed that the change in duty cycle and pulse frequency influenced the crystal structure, preferred orientation, and crystallite size of the deposit. A high pulse frequency improved the compactness of the composite coating, while longer pulse off-time and application of reverse pulse resulted in highly oriented (220) texture of pure Cu and Cu-Gr nanocomposite coatings. Due to graphene co-deposition, the copper grains became more refined, and hence the microhardness of the composite coating showed a tremendous increase compared to pure Cu coating. The Tafel polarization and electrochemical impedance studies revealed that pulse reverse electrodeposited Cu-Gr coating has higher corrosion resistance than pure Cu coating due to strong (220) texture and barrier effect of graphene