کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1256854 971534 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A facile preparation and electrochemical properties of nickel based compound–graphene sheet composites for supercapacitors
ترجمه فارسی عنوان
آماده سازی فوری و خواص الکتروشیمیایی ترکیب مرکب نیکل بر روی کامپوزیت ورق گرافن برای سازندگان ابر
کلمات کلیدی
ترکیب نیکلی، گرافن، عملکرد الکتروشیمیایی، ابرخازنها
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی

Composites of a nickel based compound incorporated with graphene sheets (NiBC–GS) are prepared by a simple flocculation, using hydrazine hydrate as flocculant and reductant, from a homogeneous intermixture of nickel dichloride and graphene oxide dispersed in N,N-dimethylformamide. Morphology, microstructure and thermal stability of the obtained products were characterized by field-emission scanning electron microscopy, X-ray diffraction and thermal gravimetric analysis. Furthermore, the electrochemical properties of NiBC–GS, as electrode materials for supercapacitors, were studied by cyclic voltammetry and galvanostatic charge/discharge in 2 mol L−1 KOH solution. It was determined that for NiBC–GS annealed at 250 °C, a high specific capacitance of 2394 F g−1 was achieved at a current density of 1 A g−1, with 78% of the value (i.e., 1864 F g−1) retained after 5000 times of repeated galvanostatic charge/discharge cycling. The high specific capacitance and available charge/discharge stability indicate the synthesized NiBC–GS250 composite is a good candidate as a novel electrode material for supercapacitors.

Composites of a nickel based compound incorporated with graphene sheets (NiBC–GS) are prepared by simple flocculation from a homogeneous intermixture of nickel dichloride and graphene oxide dispersed in dimethylformamide using hydrazine hydrate, as flocculant. A high specific capacitance of 2394 F g−1 is achieved at a current density of 1 A g−1 for NiBC–GS annealed at 250 ̊C, with 78% of the value, i.e., 1864 F g−1, retained after 5000 times of repeated galvanostatic charge/discharge cycling.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Chemical Letters - Volume 26, Issue 5, May 2015, Pages 522–528
نویسندگان
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