| Electrophoretic deposition of nickel oxide nanoflakes on nickel substrate as binder-free electrode for electrochemical capacitors |
| کد مقاله : 1004-17THECSI |
| نویسندگان |
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مهدی کزازی * گروه مهندسی مواد، دانشگاه ملایر، ملایر، ایران |
| چکیده مقاله |
| Nickel hydroxide nanoflakes with α-phase structure were prepared using a simple chemical precipitation method with the assistance of Triton X-100. The structure and morphology of the obtained nanoflakes were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). Cathodic electrophoretic deposition (EPD) technique is used to fabricate porous pure nickel hydroxide film on nickel substrate from ethanolic suspensions using triethanolamine (TEA) as a dispersant. Finally, the deposited electrodes are heated at 350 °C for 3 h to form NiO electrode. The energy storage performance of the prepared electrode as supercapacitor electrode was evaluated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) examinations in 6 M KOH aqueous solution at various current rates. The NiO electrode exhibited high specific capacitances of 672, 611, 453 and 355 F g-1 at discharge current densities of 1, 2, 5 and 10 A g-1, respectively. Such a relatively good rate capability of the NiO electrode can be due to the porous structure of the NiO particles with nanoflake morphology and the absence of the insulating polymeric binder within the electrode structure. These characteristics can provide fast and efficient electrical conductive pathway for the transport of electrons and electrolyte ions to the active material, leading to more convenient redox reaction of NiO. Overall, It is found that EPD shows promising potential for the fabrication of binder-free electrodes for supercapacitor and battery applications. |
| کلیدواژه ها |
| Nickel oxide, Electrophoretic deposition, Supercapacitor, Electrochemical performances. |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |