Here, we present a binder less sputtering approach for controllable growth of copper nitride (Cu3N) nanoflakes incorporated into 2D layered molybdenum disulfide (MoS2) nanoworms directly grown on flexible stainless steel (SS) substrate. The formation of the intermixed nanostructure is revealed by surface morphology. Moreover, the porous structure and good conductivity, and the presence of sulfur and N2 edges facilitate the synergistic effect favor more pathways for insertion and desertion of electrolyte ions (Na+). The optimized composite electrode achieves an outstanding specific capacitance (215.47 F/g at 0.5 A/g) along with remarkable elongated cycle life (∼90% retention over 2000 cycles at 9.5 A/g). Additionally, the electrode (of dimensions 3 × 1 cm2) shows high energy density (∼30 Wh/kg at a power density of 138 W/kg), extended potential window (1 V), fair mechanical stability, and pliability (retains ∼91% specific capacitance at 175° bending angle). The contemporary method provides a cathode material for practically applicable supercapacitors with superior flexibility and desirable electrochemical properties.
We report the fabrication of binder-free, low-cost and efficient hybrid supercapacitive electrode based on the hexagonal phase of two-dimensional MoS 2 nanoworms reinforced with molybdenum nitride nanoflakes deposited on stainless steel (SS) substrate using reactive magnetron sputtering technique. The hybrid nanostructured MoS 2 -Mo 2 N/SS thin film working electrode delivers a high gravimetric capacitance (351.62 F g −1 at 0.25 mA cm −2 ) investigated in 1 M Na 2 SO 4 aqueous solution. The physisorption/intercalation of sodium (Na + ) ions in electroactive sites of MoS 2 -Mo 2 N composite ensures remarkable electrochemical performance. The deposited porous nanostructure with good electrical conductivity and better adhesion with the current collector demonstrates a high-energy density of 82.53 Wh kg −1 in addition to a highpower density of 24.98 kW kg −1 . Further, excellent capacitance retention of 93.62% after 4000 galvanostatic charge-discharge cycles elucidated it as a promising candidate for realizing highperformance supercapacitor applications.
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