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Mesoporous nanomaterials not only possess strong ability to adsorb and interact with guest species both on their outer and inner surfaces, but also exhibit nanoscale effects in their channels and on the walls of their pores. This opens up intriguing possibilities for the design of highly activity catalysts by means of mesoporous materials. Here we present a facile method for the in-situ incorporation...
Exfoliated graphite (EG) was found to be a flexible and conductive support of anode materials for lithium ion batteries through the preparation of the composite of pyrolytic carbon-coated nano-sized silicon nanoparticles supported by exfoliated graphite (pC-Si-EG). Electrochemical analyses revealed that pC-Si-EG composite delivered a high capacity of 902.8mAhg−1 at a current density of 200mAg−1 and...
Boron (B) was doped into polyacrylonitrile-based carbon fibers (CFs) in various contents by exposing the CFs in a vapor of B by the decomposition of B 4 C. The structural evolution of B-doped CFs on different B concentrations and heat-treatment temperatures was studied using scanning electron microscope, transmission electron microscope, X-ray diffraction and Raman spectroscopy. It was found...
Short carbon fiber reinforced graphite blocks (SFGs) were fabricated from a mixture of mesophase pitch, natural graphite flakes and short carbon fibers by hot-pressing at 2773K. The effect of fiber content on the structure and thermal/mechanical properties of the SFGs was investigated. It was found that introducing the fibers lowered the densification, and also changed the pore structure and pore...
B 4 C/graphite composites (BGC) containing substitutional boron were fabricated by pressureless sintering of powder mixtures of petroleum coke, coal tar pitch and B 4 C. After sintering at 900°C and graphitizing at 2200°C, the microstructure of BGC was characterized by SEM, TEM, XRD, Raman spectroscopy and optical microscopy. XPS measurements revealed the formation of BC 3 ...
A graphite block derived from natural graphite flakes (NGF) has high thermal conductivity (TC) but poor mechanical properties. An effort to overcome this shortcoming was made by introducing carbon nanotubes (CNTs) onto the NGF surface by chemical vapor deposition (CVD). A block with a CNT–NGF–CNT sandwich structure was then prepared by hot-pressing at 2973K. The new structure improved bend strength...
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