Investigation of magnetron sputtered Ni@Cu/ WS ₂ as an electrode material for potential supercapattery devices

Abstract

Summary The supercapattery, a hybrid device with both capacitive and battery characteristics, owing to its excellent energy, capacity and power capabilities has broadly been recognized as an eminent energy storage device. With such fascinating features, it still craves for efficient electrode materials to improve energy storage performance. Our study presents the electrochemical analysis of magnetron sputtered pristine tungsten disulfide (WS2) and WS2 anchored over copper (Cu) interfacial layer by employing nickel foam as a current collector. To probe the structural composition, surface morphology and elemental analysis of sputtered materials, X‐ray diffraction, scanning electron microscopy and energy‐dispersive X‐ray spectroscopy are utilized. By employing three‐electrode cell configuration the deposited electrodes are then examined for electrochemical characterizations. The optimal electrode Ni@Cu/WS2 (S2) in this assembly revealed a specific capacity (Qs) of 357 C/g at 3 mV/s and 247.4 C/g at 0.5 A/g. Relying on the electrochemical performance, S2 is further utilized for asymmetric architecture (hybrid device), and hence attained Qs of 185.8 C/g and divulged high energy (Ed) and power (Pd) of 43.9 Wh/kg and 425 W/kg, respectively. Furthermore, for cyclic performance at a high current density js of 8 A/g, the device exhibited efficient stability performance of 98.1% against 4500 consecutive galvanostatic charge discharge (GCD) cycles. Moreover, by applying the semi‐empirical approach, a device is assessed for capacitive and diffusive contribution, with maximum contribution of 36.93% and 93.68% against potential scan rates of 100 and 3 mV/s, respectively. All the intriguing results attained via magnetron sputtered S2 vibrantly increase its worth as an electrode material for practical hybrid device applications.

Enhanced hydrogen evolution and symmetric supercapacitor performance of a Ru-doped multiphase WS2 electrode

“…It is noted that the 2H/1T-WS 2 -10 electrode has higher specific capacitance (664 F g −1 ) and energy density (92 W h kg −1 ) than 2H-WS 2 (269 F g −1 and 37 W h kg −1 ), 2H-WS 2 -2 (460 F g −1 and 64 W h kg −1 ) and 2H-WS 2 -6 (462 F g −1 and 66 W h kg −1 ) electrodes. The supercapacitor performance of the 2H@1T multiphase Ru doped WS 2 electrode is close to the literature report of 2D TMD based symmetric or asymmetric supercapacitor cells 36–52 (Table 1).…”

“…4a) and and 66 W h kg −1 ) electrodes. The supercapacitor performance of the 2H@1T multiphase Ru doped WS 2 electrode is close to the literature report of 2D TMD based symmetric or asymmetric supercapacitor cells [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52] (Table 1).…”

Layered Transition Metal Sulfides for Supercapacitor Applications

“…Similarly, Iqbal et al successfully fabricated Ni@Cu/WS 2 electrodes via magnetron sputtering technique. [46] The optimal electrode Ni@Cu/WS 2 (S2) demonstrated a specific capacitance of 353.4 F g À 1 at a current density of 0.5 A g À 1 . Due to the great performance of this electrode, it has subsequently been used in unit cell configuration for the hybrid device (S2//AC) which is illustrated at Figure 5.…”

Binary metallic sulphide‐based nanocomposites with ZnO additives: A dual‐functioning electrode material for energy storage and glucose sensing

“…Subsequently, the experimentation involves a gradual increase in glucose concentration within the solution. Moving on to Ni@Cu/WS 2 43.9 425 Iqbal et al [44] WS 2 -PANI 6.42 399.9 Fatima et al [45] NiCoMn-CH nanoflakes 20.31 748.6 Zhong et al [46] MnO 2 /graphene 16 95 Chang et al [47] CoNbS/PANI 35 2400 Afzal et al [24] rGO-MoS 2 -WS 2 15 373 Lima [16] CoS 4 /WS 2 47.3 512 Shrivastav et al [48] Zn-MOF-rGO 7.1 400 Rani et al [49] KCu 7 S 4 /rGO 75 657 Li et al [50] ZnO@CoNbS Figure 10B, it illustrates the introduction of 1.0 mM of glucose into the system. As the potential applied to the working electrode is adjusted, the current undergoes a gradual ascent, a response attributed to adding glucose.…”