Enhanced Supercapacitor Performance and Electromagnetic Interference Shielding Effectiveness of CuS Quantum Dots Grown on Reduced Graphene Oxide Sheets
Kalyan Ghosh, Suneel Kumar Srivastava
Abstract
). The as-prepared nanocomposite revealed excellent improvement in specific capacitance, cycling stability, Warburg impedance, and interfacial charge transfer resistance compared to neat CuS. The fabricated nanocomposites were also investigated for their bulk DC electrical conductivity and EMI shielding ability. It was observed that the CuS/RGO nanocomposite (9 wt % Cu-DTO) exhibited a total electromagnetic shielding efficiency of 64 dB at 2.3 GHz following absorption as a dominant shielding mechanism. Such a performance is ascribed to the presence of interconnected networks and synergistic effects.
Topics & Concepts
NanocompositeMaterials scienceGrapheneCrystallinityRaman spectroscopyOxideSupercapacitorX-ray photoelectron spectroscopyQuantum dotChemical engineeringDielectric spectroscopyNanotechnologyCapacitanceComposite materialElectrochemistryElectrodeChemistryMetallurgyOpticsPhysicsPhysical chemistryEngineeringElectromagnetic wave absorption materialsSupercapacitor Materials and FabricationAluminum Alloys Composites Properties