Portable and matured energy storage devices are in high demand for future flexible electronics. Flowery shaped MoS2 nanostructures with porous and flake like morphology was used to study the supercapacitive nature with specific capacitance (Csp) of 169.37F/g, the energy density of 28.43 Wh/Kg and power density of 10.18 W/Kg. This nanoflower like architecture was decorated on 3D-graphene on Graphite electrode to design the solid-state-supercapacitor prototype device of dimensions of 23.6 × 22.4 × 0.6 mm3 having considerable high Csp of 58.0F/g and energy density of 24.59 Wh/Kg, and power density of 8.8 W/Kg. Four fabricated supercapacitors were connected in series for real state practical demonstration using the light emitting diode that remains enlightened for 40 s by charging it only for 25 s. This study demonstrates the 3D-graphene/MoS2 nanohybrid has a quite high overall potential window nearly about 2.7 V (−1.5 to +1.2 V) in KOH-PVA medium which can be used for the development of solid-state supercapacitors thereby completely eliminating the need for any expensive ionic liquid mediums thus building an exciting potential for high-performance energy storage/transfer devices.
The electrochemical performance of the flexible solid-state supercapacitor device comprising ultrathin Ni–V layered double hydroxide nanosheets grown on carbon cloth showed a negligible change upon bending and twisting of the device.
Quantum dots (QDs) have sparked great interest due to their unique electronic, optical, and structural properties. In this review, we provide a critical analysis of the latest advances in the synthesis, properties, and applications of QDs. We discuss synthesis techniques, including colloidal and hydrothermal synthesis, and highlight how the underlying principles of these techniques affect the resulting properties of QDs. We then delve into the wide range of applications of QDs, from QDs based color conversion, light-emitting diodes and biomedicine to quantum-based cryptography and spintronics. Finally, we identify the current challenges and future prospects for quantum dot research. By reading this review, readers will gain a deeper understanding of the current state-of-the-art in QDs research and the potential for future development.
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