کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7873424 | 1509335 | 2018 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Layer-by-layer self-assembly of ternary MoS2-rGO@PPyNTs nanocomposites for high performance supercapacitor electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to prevent the agglomeration and effective utilization of surface area of reduced graphene oxide (rGO) nanosheets for supercapacitor electrode, layered molybdenum disulfide/ reduced graphene oxide (MoS2/rGO) nanocomposite has been synthesized by layer-by-layer self-assembly of positively charged MoS2 nanosheets with negatively charged graphene oxide (GO) nanosheet followed by vacuum-drying and hydrothermal reduction of GO. Ternary MoS2-rGO@PPyNTs nanocomposites were obtained by combining pre-synthesized Polypyrrole nanotubes (PPyNTs) with layered MoS2-GO followed by in-situ hydrothermal reduction of GO. The porous layered structure of MOS2-rGO nanocomposite provides enormous surface area, enhanced electronic conductivity and additional electro-active sites. MoS2-PPyNTs, rGO-PPyNTs and PPyNTs electrodes were also prepared and compared their electrochemical performance with the ternary electrode. The synergetic effect of layer-by-layer assembly of MoS2 and rGO nanosheets with PPyNTs imparts immense electrochemical activity with an extraordinary specific capacitance of 1561.25â¯F gâ1 at 1â¯A gâ1. The ternary nanocomposite possess energy density and power density of 555â¯Wâ¯h kg-1 and 800â¯W kg-1, respectively at 1-fold current density in the potential range â0.3 to 1.3â¯V. MoS2-rGO@PPyNTs/ITO ternary electrode also possesses cycling stability of 72% of initial specific capacitance after 10,000 cycles at 10-fold current density.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 243, September 2018, Pages 75-89
Journal: Synthetic Metals - Volume 243, September 2018, Pages 75-89
نویسندگان
Devalina Sarmah, Ashok Kumar,