Self-assembled 3D graphene-based aerogel with Au nanoparticles as high-performance supercapacitor electrode

Multifunctional Dy2NiMnO6/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

“…The higher I D /I G intensity ratio in DNMO/rGO (100:50) and DNMO/rGO (50:100) nanocomposites suggested a possible removal of most of the oxygenic functional groups during the reduction process and successful conversion of GO to rGO during the hydrothermal treatment. 38 Morphology and elemental composition of bare DNMO and DNMO/rGO (50:100) nanocomposite were investigated through field emission SEM (FEG-SEM) and EDS. As shown in Figure 3a, DNMO exhibits spherical-shaped particles with an average size of 382 nm in a well-connected manner (inset).…”

“…The I D / I G intensity ratios of GO, DNMO/rGO (100:50), and DNMO/rGO (50:100) nanocomposites are 0.83, 1.12, and 1.14, respectively. The higher I D / I G intensity ratio in DNMO/rGO (100:50) and DNMO/rGO (50:100) nanocomposites suggested a possible removal of most of the oxygenic functional groups during the reduction process and successful conversion of GO to rGO during the hydrothermal treatment …”

“…Figure 8b,c show the CV curves of DNMO/rGO (100:50) and DNMO/rGO (50:100) nanocomposites in 5 M KOH electrolyte at a scan rate of 1,2, 5, 10, 25, 50, 80, and 100 mV s −1 with a potential range of 0.1−0.5 V. The oxidation peak and corresponding reduction peaks appeared in both the CV curves and current increases with scan rates, signifying pseudocapacitive nature and significant electrochemical reversible behavior with desirable capacitance. 49 The specific capacitance of DNMO/rGO (50:100) and DNMO/rGO (100:50) nanocomposite electrodes can be investigated from the CV curves as expressed by the relation 38…”

Organic–inorganic hybrid nanomaterials prepared via polymerization-induced self-assembly: recent developments and future opportunities

“…Au nanoparticles have broad applications in catalysis, biological imaging, and energy storage due to their good biocompatibility and high photothermal conversion efficiency. [140][141][142] Bleach et al 122 synthesized poly(oligoethylene glycol methacrylate)-b-poly(2-(dimethylamino)ethyl methacrylate)-b-polystyrene (POEGMA-PDMAEMA-PSt) triblock copolymer nano-objects by RAFT dispersion polymerization with tertiary amine groups located on the corona. Au/polymer nanocomposites were prepared by the in situ reduction of HAuCl 4 using NaBH 4 .…”

Recent progress in graphene and its derived hybrid materials for high-performance supercapacitor electrode applications

“…[16][17][18][19][20][21] Recently, composites made of graphene have been researched to achieve exceptional electrochemical performance. [22][23][24][25][26] Due to its poor EDLC-type nature, the use of graphene as electrodes in supercapacitors is constrained by low capacitance and low energy density. To address these issues, composite materials based on graphene are created for supercapacitor applications.…”