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Flexible free-standing materials make the electrode fabrication process simple in comparison with the conventional binder-enriched electrodes, especially for those with desirable mechanical strength. In the present work, the crosslinked multi-walled carbon nanotubes (C-CNTs) films with tensile strength of >1.75 MPa, were prepared by facile filtering the dispersion of the micrometer-scaled 3-D framework...
Aligned carbon nanotube (CNT) arrays are promising candidates for strain sensors owing to their scalable preparation and excellent conductivity and stretchability. However, aligned CNT arrays are limited by low strain sensitivity and buckling deformation. In addition, cross-stacked CNT array films layer-by-layer assembled on soft substrates exhibit anisotropic mechanical behavior due to their asymmetric...
Owing to the distinctively morphological and structural features, vertically-aligned graphene nanosheets (VGs) possess many unique properties and hold great promise for applications in various fields. For controllable preparation and wide application of VGs, the establishing reliable growth method and profound understanding of the growth mechanism are of vital significance. Up to date, VGs are normally...
Three-dimensional (3D) electrodes hold great potential for supercapacitors (SCs) due to their unique architectures and prominent electrochemical properties. Herein, a kind of 3D FeOOH/reduced graphene oxide/Ni foam (FeOOH/rGO/NF) electrode with remarkable capacitive performance has been developed as a new anode for asymmetric supercapacitors (ASCs). Benefiting from the improved conductivity and increased...
In this work, we report on the effective implementation of the direct and scalable floating catalyst method to synthesize self-supporting carbon nanotube (CNT) aerogels at high deposition rates. Through the adaptable process conditions, the highly porous and ultralight CNT aerogels with densities ranging from 0.55 to 32 mg/cm3 are synthesized. The aerogels exhibit high porosity (>98%) and surface...
In this study, we present a simple and effective mechanical densification method that uses carbon nanotube (CNT) fibers synthesized via a floating-catalyst technique to produce highly dense CNT ribbons. After being infiltrated with epoxy, the resulting cross-linked CNT ribbons exhibited impressive improvements of an increase in strength by 13.5 times and an increase in stiffness by more than 63 times,...
Sodium ion batteries are currently emerging as a replacement for lithium ion batteries due to sodium abundance in the earth's crust. The recent development of sodium ion batteries anode has been achieved by the use of selected carbon as an anode. The performance of the selected carbon materials such as the charge/discharge capacity, voltage profile and cyclic stability, depend strongly on the sizes,...
The morphology, crystallization behavior, electrical conductivity, and thermal stability of polypropylene (PP) modified with disentangled multi-walled carbon nanotubes (MWCNTs) is reported. Slightly oxidized MWCNT clusters were disentangled in solution by mild sonication in the presence of exfoliated α-zirconium phosphate nanoplatelets. The disentangled MWCNTs were isolated using acid-induced coagulation...
The secondary electron (SE) emission (SEE) in a triode carbon nanotube (CNT) field emission display (FED) and its influence on the image quality have been studied with a 3.5in. vacuum-sealed FED prototype fabricated by using screen printing and frit sealing techniques. By analyzing the emission property difference of the device under two different kinds of work modes, we have found that it is the...
HfC-decorated carbon nanotube (CNT) yarns have been fabricated by pre-coating pure CNT yarns with Hf and in situ current heating in vacuum. HfC nanocrystals were formed at about 1600K through reaction of the CNTs with Hf. The fabricated HfC-CNT yarns had a work function of 3.9eV, lower than that of pure CNT yarns. For field-emission applications, HfC-CNT sharp tips made up of HfC nanorods were obtained...
The effect of carbon deposits on the reactor wall during the growth of multi-walled carbon nanotube (MWCNT) arrays was studied. It was found that the carbon deposits were helpful in converting the continuous catalyst film into carbon-containing nanoparticles before growth started, which was beneficial for the nucleation of MWCNT arrays. As a result, MWCNT arrays synthesized in a reactor with carbon...
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