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Amorphous carbon-based anode materials are considered as one of the most promising candidates for sodium-ion batteries (SIBs). However, there are two main barriers before large-scale industrialization, i.e. low initial coulombic efficiency (ICE) and high cost caused by low carbon yield of precursors. In this work, we report a novel commercial activated amorphous carbon-based anode synthesized through...
Although hard carbons have been turned out to be suitable for sodium storage, their high cost and low initial coulombic efficiency (ICE) need to be addressed for the commercial application. Here, we report an effective route including a pyrolysis process and a reductive strategy to synthesize high-performance hard carbons from waste apricot shell. The obtained hard carbons inherit the unique architecture...
Preparation of high-performance carbon materials with an abundance of heteroatoms, edges, and defects for sustainable energy-conversion technologies, such as supercapacitors and oxygen reaction reduction (ORR), are still a challenge. Herein, we reported a facile strategy for the large-scale synthesis of nitrogen-doped porous carbon via carbonization of core-shell structured protonated g-C3N4@polypyrrole...
A low-cost and sustainable anode material is essential for the future commercialization of sodium-ion batteries (SIBs). Among all proposed anode materials for SIBs, hard carbons are considered to hold the most promise. However, high cost and low carbon yield of precursors limit its industrialization process. Here the synthesis of a biomass-derived hard carbon from leonardite humic acid (LHA) through...
The Monte Carlo simulation has been applied to discuss the step effect on a zigzag graphene nanoribbon structure in a longitudinal magnetic field. The effects of the singe-ion anisotropies, longitudinal magnetic fields and temperature on the magnetization plateaus have been investigated in detail. Our results show that the number of magnetization plateaus for the system dissatisfy 2S + 1 criterion...
Up to now, the cost-effective mass production of pristine graphene sheets remains a significant challenge. We report a binary solvent system of dimethylformamide and n-butylalcohol that facilitates the high concentration production of unoxidized graphene through liquid-exfoliation assisted with sonication. A stable dispersion with concentration as high as 6.5mg/ml, was received via this method. The...
A carbon block with ultra-high anisotropy was produced from a commercial graphite paper as the thermal reinforcement and a thermosetting phenolic resin as the binder. Hot-pressing at a maximum temperature of 200°C was used to densify and integrate the graphite paper stacks. It has been found that the graphite paper blocks have high thermal conductivities in the paper direction and low ones perpendicular...
Carbon nanotube (CNT) fluids with liquid-like behavior were synthesized and incorporated into a polymeric matrix to investigate the processability and mechanical performance of the resulting composite, as well as the distribution of CNTs in the host material. We demonstrated that the simultaneous reinforcement and plasticization effect on the polymeric matrix by the novel multifunctional component...
A carbon black derivative was prepared through a three-step procedure involving sonication-assisted oxidation, covalent grafting by a charged polysiloxane quaternary ammonium salt and ion exchange with a poly(ethylene) glycol-functionalized sulfonate salt. Such surface-functionalized carbon black can behave as a liquid at room temperature in the absence of any solvent. Transmission electron microscopy...
A carbon/carbon (C/C) composite with a thermal conductivity greater than 500W/mK was used as a heat-redistribution material in a new thermal protection system. Using this material, the temperature at the hot head of a model hypersonic aircraft re-entry cone was sharply decreased, which effectively reduced the thermal burden and protected the hot side from being destroyed.
A simple method for preparing the mesophase-pitch-based carbon foams at low pressures through prolonging the soaking time in the preparation process of the mesophase pitch was disclosed. The physical properties, morphologies and the crystal structure of the as-obtained foams were investigated. Bulk density of the resultant carbon foams cover a range 0.514–0.624g/cm 3 , under the preparation...
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