کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7920035 | 1511486 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Green and one-step synthesis for Ag/graphene hybrid supercapacitor with remarkable performance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Highly uniform reduced graphene oxide/silver nanoparticles binary nanocomposites were successfully prepared using a consolidated dopamine-mediated multistep procedure and a novel 'green' one-step solution route mediated itself by graphene oxide. In both nanocomposites, Ag nanoparticles (NPs) with sizes of several nanometers result, anchored on the surface of reduced graphene oxide (rGO) sheets. On the other hand, the one-step procedure allows homogeneously dispersed NPs) on highly exfoliated rGO. The rGO/Ag NP nanocomposites were used as electrode materials for supercapacitors. It was observed that the capacitive performances were markedly affected by the size and dispersion of Ag NPs as well as graphene exfoliation. The one-step synthesized nanocomposite exhibited long stability and specific capacitance as high as 1850â¯F/g in the voltage range [0 to 1] V and 628â¯F/g in the voltage range [-0.5 to 0.5] V at a scan rate of 2â¯mV/s. The excellent capacitive performance can be attributed to the uniform coating of Ag NPs (â¼8â¯nm diameter) on rGO nanosheets in close synergy with rGO resulting in a highly conductive (electrical conductivity up to 1.3â¯Ãâ¯107â¯S/m) spongy material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 120, September 2018, Pages 241-249
Journal: Journal of Physics and Chemistry of Solids - Volume 120, September 2018, Pages 241-249
نویسندگان
M. Sarno, M. Casa,