کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7737148 | 1497974 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of porous graphene/activated carbon composite with high packing density and large specific surface area for supercapacitor electrode material
ترجمه فارسی عنوان
سنتز کامپوزیتی گرافن متخلخل / کربن فعال با تراکم پخت بالا و سطح خاص سطح مخصوص مواد الکترودهای سوپرکاسیون
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کلمات کلیدی
گرافن، کربن فعال، کربن سازی هیدروترمال فعال سازی شیمیایی، مخزن سوپر
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
A simple method has been developed to prepare graphene/activated carbon (AC) nanosheet composite as high-performance electrode material for supercapacitor. Glucose solution containing dispersed graphite oxide (GO) sheets is hydrothermally carbonized to form a brown char-like intermediate product, and finally converts to porous nanosheet composite by two-step chemical activation using KOH. In this composite, a layer of porous AC coats on graphene to from wrinkled nanosheet structure, with length of several micrometers and thickness of tens of nanometer. The composite has a relatively high packing density of â¼0.3 g cmâ3 and large specific surface area of 2106 m2 gâ1, as well as containing plenty of mesopores. It exhibits specific capacitance up to 210 F gâ1 in aqueous electrolyte and 103 F gâ1 in organic electrolyte, respectively, and the specific capacitance decreases by only 5.3% after 5000 cycles. These results indicate that the porous graphene/AC nanosheet composite prepared by hydrothermal carbonization and chemical activation can be applied for high performance supercapacitors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 258, 15 July 2014, Pages 290-296
Journal: Journal of Power Sources - Volume 258, 15 July 2014, Pages 290-296
نویسندگان
Chao Zheng, Xufeng Zhou, Hailiang Cao, Guohua Wang, Zhaoping Liu,