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A self-supporting and flexible activated carbon/carbon nanotube/reduced graphene oxide (AC/CNT/RGO) film has been rationally designed for constructing high-performance supercapacitor. The AC/CNT/RGO film is prepared by anchoring the AC particles with a 3D and porous framework built by hierarchically weaving the 1 D CNT and 2D RGO using their intrinsic van der Waals force. The CNT network is beneficial...
Hybrid graphene aerogels (HGA) consisting of graphene oxide (GO) and graphene nanoplatelets (GNP) were prepared and introduced into polyethylene glycol (PEG) via vacuum impregnation, aiming at obtaining composite phase change materials (PCMs) with high thermal conductivity, outstanding shape-stabilization, high energy storage density, commendable thermal repeatability and the ability to light-to-heat...
Carbon nanotube reinforced carbon/carbon composites were fabricated via in situ growth of carbon nanotubes directly on needle-punched felts following direct resistive heating thermal gradient chemical vapor infiltration. The infiltration kinetics, mechanical properties and microstructure of carbon nanotube reinforced carbon/carbon composites were studied. The results show that rough laminar pyrocarbon...
The design and preparation of high comprehensive performance composite phase change materials (PCMs) via a straightforward route were pioneered. Graphene oxide (GO) nanosheets were introduced as supporting materials to keep the shape of polyethylene glycol (PEG) stable during the phase change process and graphene nanoplatelets (GNP) were used as conductive fillers to improve the thermal conductivity...
Two carbonized oxidized polyacrylonitrile fiber (OPF) felts and one polyacrylonitrile-based carbon fiber (CF) felt were used as preforms to prepare two kinds of carbon/carbon composites by chemical vapor infiltration,and the effect of fiber type on the microstructure and mechanical properties of the composites were investigated. The microstructure was characterized bypolarized light microscopy and...
Recently, we have developed a catalyst-free and direct growth approach for nanographene on various substrates by a remote-plasma assisted chemical vapor deposition. A two-step growth strategy for separately controlling the nucleation and subsequent edge growth was further developed for growing graphene sheets with adjusted nuclei density and large domain size of 500nm. The key for tuning the growth...
Graphene oxide (GO) obtained by Hummers method was functionalized by ethylenediamine (EA) and 1,6-hexanediamine (HA) in N,N-dimethyl formamide using 1,1,3,3-tetramethy-luronium hexafluorophosphate as a coupling agent. The functionalized GO was characterized by elemental analysis, FT-IR, XRD, XPS, TGA, SEM and TEM. Results showed one carbon atom in 9–10 of the carbon atoms in GO was functionalized...
A simple and efficient method to repair defects in graphene oxide (GO) is reported, accompanied by a simultaneous reduction process by a methane plasma. The graphene after repair is of high quality. For a typical monolayer after repair and reduction, the minimum sheet resistance at the Dirac point and the Raman D/G peak intensity ratio are about 9.0kΩ/□ and ∼0.53, respectively.
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