| Facile synthesis of Ni-Co LDH /Cu2SnO4 nanostructure for high performance supercapacitors |
| کد مقاله : 1060-17THECSI |
| نویسندگان |
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مبینا حاجی عباسی *1، رضا انصاری2، مونا فرهپور3 1دانشجوی کارشناسی ارشد شیمی تجزیه، دانشکده علوم، دانشگاه گیلان، رشت، ایران 2Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Guilan, Namjoo, Street, P.O. Box: 1914–41335, Rasht, Iran Electroanalytical Chemistry 3Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Guilan, Namjoo, Street, P.O. Box: 1914–41335, Rasht, Iran |
| چکیده مقاله |
| Supercapacitors have attracted significant attention due to the fast charge-discharge ability, excellent rate capability and long-time stability. In this study, a nanoarray electrode composed of Cu2SnO4 and Ni-Co layerd double hydroxide (Ni-Co LDH) supported on Ni foam (NF) is successfully constructed by in situ growth route. Firstly , Copper (II) - Tin (IV) oxide arrays were fabricated by a mild hydrothermal reaction as the core. Afterwards, the as-prepared electrode was utilized as a skeleton to immobilize Ni-Co LDH with an electrochemical deposition method. The electrochemical performance of prepared Ni-Co LDH/Cu2SnO4 to achieve high specific capacitance and long-term life for supercapacitor electrode applications. The electrochemical properties of the Ni-Co LDH/Cu2SnO4 as a binder-free electrode for a supercapacitor were examined using cyclic voltammetry (CV), galvanostatic charge-discharge analysis (GCD), electrochemical impedance spectroscopy (EIS), and cycle life measurements in 2 M KOH electrolyte. The GCD analysis exhibited a specific capacitance as high as 2791 F g−1 at 1 A g−1. This capacitor electrode has exellent cyclic stability with 96.92% capacitance retention after 3000 cycles at 20 A g−1. These results demonstrate that Ni-Co LDH/Cu2SnO4 could be a promising electrode for high-performance energy storage devices. Moreover, an asymmetric supercapacitor was fabricated using Ni-Co LDH/Cu2SnO4 as the positive electrode, and activated carbon on Ni foam (AC/NF) as the negative electrode displayed an excellent electrochemical behavior with a high specific capacitance of 177.33 F g–1 at 1 A g–1. |
| کلیدواژه ها |
| Cu2SnO4 nanostructure, Ni-Co LDH, Supercapacitor, Hydrothermal method, Energy storage. |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |