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Developing flexible electrode is essential for new generation wearable electronics and energy devices. Combining with membrane-assisted vacuum filtration, highly flexible and stable hybridized electrodes, containing of S-doped graphene, carbon nano-onion (OLC) and Ni3S2 composite (GCNi3S2) are obtained. X-ray absorption characterizations reveal the transfer of electrons from C to Ni atoms due to the...
Since Materials Genome Initiative has been proposed for demonstrating promising approaches in achieving high-performance materials, here we employ such concept to present a Materials Genome Initiative inspired universal permittivity-attenuation evaluation diagram (PAED) for accelerating design of highly efficient dielectric-based microwave absorption composites. Initially, parameter sweeping has been...
The biomass-derived carbon materials as ideal low-cost raw materials have recently presented great application potential in energy storage. However, the amorphous active carbon from biomass is usually required to be further processed into electrodes with binders and conductive agents due to their essentially poor electrical conductance, which limits the fabrication as free-standing electrodes for...
Diamond/CeF3 composite film (DCCF) electroluminescence devices was fabricated on highly doping n-type silicon substrates by using plasma chemical vapor deposition techniques and vacuum electron beam evaporation techniques. The films were characterized by field emission scanning electron microscopy (FE-SEM), Energy dispersive spectrum (EDS), X-ray diffraction (XRD) and electroluminescence (EL) spectrum...
Epoxy networks, as common protection materials, possess some adverse degradation effects in the gamma irradiation environment, which greatly limit their potential applications for metal protection in nuclear industry. To avoid this, we attempted to incorporate the graphene oxide (GO) with significant radical scavenger behavior into the epoxy resin, followed by thermal polymerization to obtain the...
Since various criteria including effective absorption intensity, broad absorption bandwidth, sufficient mechanical properties and excellent stability are required to meet the benchmark in practical service, here we propose a novel strategy to fabricate strong and thermostable polymeric graphene/silica textile composites for practical microwave absorption applications. For achieving homogeneous configuration,...
NASICON-type Na3V2(PO4)3(NVP) is one of the most promising cathode materials for sodium-ion batteries (SIBs). Here, we report a simple sol–gel method to prepare NVP@C porous microspheres network for high performance SIBs, which can realize NVP nanoparticles successfully embedding into acetylene carbon (SP) and multiple walled carbon nanotubes (MCNTs) matrices. The electrochemical characterizations...
For extending graphene aerogels for broad applications, here we demonstrate a simple and universal approach for scalable fabricating novel dual carbon three-dimensional (3D) hybrid structures, where the interspace of a 3D carbon texture has been modified by in situ generating graphene aerogels. Owing to the unique exceptional 3D carbon bi-frameworks of enhanced electrical conductivity and flexibility,...
Novel silicon nanoparticle/porous carbon nanofiber (Si/PCNF) hybrids with high Si loading (52wt.%) have been designed and fabricated through a simple electrospinning. The Si/PCNF of uniform fiber diameter has exhibited high specific surface area and unique porous structure. The continuous three-dimensional porous carbon networks have effectively provided strain relaxation for Si volume expansion/shrinkage...
We have demonstrated a highly ordered porous carbon (HOPC) as an effective electromagnetic absorber. The unique porous structures allow HOPC to possess high surface area and establish effective three-dimensional (3D) conductive interconnections at very low filler loading, which is responsible for effective electrical loss in terms of dissipating the induced current in the corresponding wax composites...
Multilayer graphene/polymer composite films with good mechanical flexibility were fabricated into paraffin-based sandwich structures to evaluate electromagnetic interference (EMI) shielding. Experimental results showed the relationship between electrical properties and shielding performance, demonstrating that electrical properties are significant factors in EMI shielding. Calculation based on electrical...
SiO 2 -matrix composites filled with 2, 5 and 10wt.% multiwalled carbon nanotubes (MWCNTs) were prepared to evaluate the dielectric properties and microwave attenuation performances over the full X-Band (8.2–12.4GHz) at a wide temperature ranging from 100 to 500°C. On the basis of the conductivity induced by the structure of the MWCNT, the transport of migrating and hopping electrons in the...
We present the study on the structure and adsorption properties of reduced graphene oxide subjected to thermal treatment in temperature range of 1100–2000°C under flowing argon. The morphology and composition analyses reveal that the defective carbon materials remaining after volatilization of oxygen and hydrogen rearrange into highly ordered hexagonal carbon layers during thermal treatment at 2000°C...
We present a customized technique to spin fiber from unique single-wall carbon nanotube (SWCNT) films utilizing a motorized pulling/twisting stage. The manufactured SWCNT fibers’ diameter ranged from 30 to 130μm. Electrical measurements show fusing current of 1–200mA – depending on the spun fiber’s diameter – which is close to the values known for copper wires with similar diameter. These results...
Large area nitrogen (N)-doped graphene films were grown on copper foil by chemical vapor deposition. The as-grown films consisted of a single atomic layer that was continuous across the copper surface steps and grain boundaries, and could be easily transferred to a variety of substrates. N-doping was confirmed by X-ray photoelectron spectroscopy, Raman spectroscopy, and elemental mapping. N atoms...
The dielectric spectroscopy of short carbon fiber/silica composite in the frequency range from 8.2 to 12.4GHz at temperatures between 30 and 600°C has been performed. The composite was prepared by conventional ceramic processing. The real part of the permittivity increases with increasing temperature, which is attributed to the shortened relaxation time of electron polarization, and the imaginary...
We applied X-ray absorption near edge structure (XANES) spectroscopy to investigate the adsorption of proteins onto single-walled carbon nanotubes (SWCNTs). Specific XANES spectral features such as peptide CO bonds in proteins were recognized and found to be affected by the corresponding aromatic structure of SWCNTs. Experimental data combined with first-principle calculation of the investigated nano-complex...
X-ray absorption near-edge structure (XANES) spectroscopy and photoelectron spectroscopy (PES) have been used to investigate single-walled carbon nanotubes (SWNTs) modified by immersion in a HBr solution at room temperature. After treatment XANES spectra of SWNTs show a new pronounced feature, which has been assigned to new bonds between the sidewall of the SWNTs and Br atoms. This investigation demonstrates...
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