Therefore, NiCo2O4 has been conceived as a promising electrode material for SCs owing to its high specific capacitance, environmental compatibility, and cost-effectiveness. In this communication, we Momelotinib mouse demonstrate a rapid and facile method to prepare highly ordered 1D nanoneedle-like NiCo2O4 selleck screening library arrays on carbon cloth serving as electrode materials for SCs. Remarkably, the carbon cloth supported NiCo2O4 nanoneedles manifests ultrahigh SCs (660 F g-1 at 2 A g-1) and good cycling stability (91.8% capacitance retention
after 3,000 cycles) at high rates in 2 M KOH aqueous electrolyte, making it a promising electrode for SCs. The fabrication method presented here is facile, cost-effective, and scalable, which may open a new pathway for real device applications [24, 25]. Methods Synthesis of NiCo2O4 nanoneedle arrays on carbon cloth
All the reagents were of analytical grade and directly used after purchase without further purification. Prior to deposition, commercial carbon cloths (1.5 × 4 cm in rectangular shape) were cleaned by sonication sequentially in acetone, 1 M HCl solution, deionized water, and ethanol for 15 min each, drying for standby. NiCo2O4 nanoneedle arrays (NCONAs) on carbon cloth were synthesized Fedratinib via a simple one-pot hydrothermal process. Four millimoles (1.1632 g) of Ni(NO3)2.6H2O and 8 mmol (2.3284 g) of Co(NO3)2.6H2O were dissolved into 75 mL of deionized water, followed by the addition of 15 mmol (0.9009 g) of urea at room temperature, Monoiodotyrosine and the mixture was stirred
to form a clear pink solution. Then, the mixture was transferred in to a 100-mL Teflon-lined stainless autoclave. Then, the well-cleaned carbon cloth was immersed in the mixture, and the autoclave was kept at 120°C for 6 h. After it was cooled down to room temperature, the product supported on the carbon cloth was taken out and washed with deionized water and ethanol several times and cleaned by ultrasonication to remove the loosely attached products on the surface. After that, the sample was dried at 80°C for characterization. Finally, the as-prepared sample was annealed at 400°C in air for 2 h. Characterization The crystalline structure and phase purity of the products were identified by X-ray diffraction (XRD) using a D8 Advance (Bruker, Karlsruhe, Germany) automated X-ray diffractometer system with Cu-Kα (λ = 1.5406 Å) radiation at 40 kV and 40 mA ranging from 10° to 70° at room temperature. Scanning electron microscopy (SEM) images were obtained using a Hitachi S-4800 microscope (Chiyoda-ku, Japan). Transmission electron microscopy (TEM) observations were carried out on a JEOL JEM-2010, Akishima-shi, Japan, instrument in bright field and on a high-resolution transmission electron microscopy (HRTEM) JEM-2010FEF instrument (operated at 200 kV).