超级电容器
三元运算
纳米复合材料
电极
材料科学
石墨烯
化学工程
逐层
电容
复合数
纳米技术
介电谱
图层(电子)
电化学
化学
计算机科学
工程类
物理化学
程序设计语言
作者
Devalina Sarmah,Ashok Kumar
标识
DOI:10.1016/j.synthmet.2018.06.001
摘要
Abstract 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 (MoS 2 /rGO) nanocomposite has been synthesized by layer-by-layer self-assembly of positively charged MoS 2 nanosheets with negatively charged graphene oxide (GO) nanosheet followed by vacuum-drying and hydrothermal reduction of GO. Ternary MoS 2 -rGO@PPyNTs nanocomposites were obtained by combining pre-synthesized Polypyrrole nanotubes (PPyNTs) with layered MoS 2 -GO followed by in-situ hydrothermal reduction of GO. The porous layered structure of MOS 2 -rGO nanocomposite provides enormous surface area, enhanced electronic conductivity and additional electro-active sites. MoS 2 -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 MoS 2 and rGO nanosheets with PPyNTs imparts immense electrochemical activity with an extraordinary specific capacitance of 1561.25 F g −1 at 1 A g −1 . The ternary nanocomposite possess energy density and power density of 555 W h kg -1 and 800 W kg -1 , respectively at 1-fold current density in the potential range −0.3 to 1.3 V. MoS 2 -rGO@PPyNTs/ITO ternary electrode also possesses cycling stability of 72% of initial specific capacitance after 10,000 cycles at 10-fold current density.
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