Enhanced electrochemical performance of α-MoO3/graphene nanocomposites prepared by an in situ microwave irradiation technique for energy storage applications |
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Authors: | P Nagaraju M Arivanandhan A Alsalme A Alghamdi R Jayavel |
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Institution: | Centre for Nanoscience and Technology, Anna University, Chennai-600 025 Tamil Nadu India, +91-44-22358326 ; Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh Riyadh Province-11451 Saudi Arabia |
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Abstract: | Nanoparticles of α-molybdenum oxide (α-MoO3) are directly grown on graphene sheets using a surfactant-free facile one step ultrafast in situ microwave irradiation method. The prepared α-MoO3 and α-MoO3/G nanocomposites are analysed by different characterization techniques to study their structural, morphological and optical properties. Transmission electron microscope images reveal the intercalation of three dimensional (3D) α-MoO3 nanoparticles into 2D graphene sheets without any agglomeration. The electrochemical results exhibit improved performance for the α-MoO3/G composite electrode compared to pristine α-MoO3 owing to its structural superiority. The specific capacitance (Cs) values of the α-MoO3/G composite and pristine α-MoO3 are measured to be 483 and 142 F g−1 respectively at a current density of 1 A g−1. The α-MoO3/G composite maintains a very strong cyclic performance after 5000 cycles. The capacitance retention of the composite electrode shows stable behavior without any degradation confirming its suitability as an enduring electrode material for high-performance supercapacitor applications.Nanoparticles of α-molybdenum oxide (α-MoO3) are directly grown on graphene sheets using a surfactant-free facile one step ultrafast in situ microwave irradiation method. |
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