کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
227784 464828 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and electrochemical analysis of graphene nanosheets/nickel hydroxide composite electrodes containing carbon nanotubes
ترجمه فارسی عنوان
آماده سازی و تجزیه و تحلیل الکتروشیمیایی نانو ذرات گرافن / الکترودهای کامپوزیت هیدروکسید نیکل حاوی نانولوله های کربنی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

A set of graphene nanosheets (GNS)/nickel hydroxide (Ni(OH)2) composites were successfully synthesized by adding single-walled carbon nanotubes (SWCNT) to the composites with various weight contents. The mixed composites were prepared by ultrasonication and chemical precipitation. It is postulated that the SWCNT act as additives in the composites, preventing the aggregation of the graphene sheets. The structural characterization indicated that the Ni(OH)2 nanoparticles were deposited on the surface of GNS, and the SWCNT were dispersed between or onto the graphene sheets. The electrochemical performance of the composites was investigated by changing the contents of the added SWCNT. The prepared GNS/SWCNT/Ni(OH)2 composites exhibited the superior electrochemical performance, indicated by the large specific capacitance over 1000 Fg−1 and excellent cycle performance over 2000 cycles. Among the prepared composites, the GNS/Ni(OH)2 composite containing 20 wt.% SWCNT displayed the maximum specific capacitance with a value of 1149 Fg−1 at a in 6 M KOH electrolyte. Moreover, 92% of the initial specific capacitance of the composite was maintained after 2000-cycle test. Based on these results, the composite is thought to be suitable candidate for supercapacitor electrode materials.

A set of graphene nanosheets (GNS)/nickel hydroxide (Ni(OH)2) composites were synthesized by adding single-walled carbon nanotubes (SWCNTs) to GNS. The characterization indicated that the Ni(OH)2 nanoparticles were deposited on the surface of GNS, and the SWCNTs were dispersed between or on the graphene sheets. The prepared GNS/SWCNT/Ni(OH)2 composites exhibited superior electrochemical performance, indicated by the large specific capacitance and excellent cycle performance.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 36, 25 April 2016, Pages 139–146
نویسندگان
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