Showing papers by "Yong Wang published in 2010"
TL;DR: In this paper, the microwave assisted synthesis of a Co3O4-graphene sheet-on-sheet nanostructure was reported, which showed an excellent high rate capability and highly reversible large capacity at common rate.
Abstract: This paper reports the microwave-assisted synthesis of a Co3O4–graphene sheet-on-sheet nanostructure. This sheet-on-sheet nanocomposite showed an excellent high rate capability and highly reversible large capacity at common rate. A capacity of 931 mA h g−1 was observed at a large current rate of 5C (4450 mA g−1), which was still larger than the theoretical capacity of Co3O4 (890 mAh g−1). The substantially improved electrochemical properties were ascribed to the unique sheet-on-sheet nanostructure. Co3O4 nanosheets were tightly stacked with graphene nanosheets (GNS), therefore volume changes of Co3O4 materials were accommodated in the presence of GNS. On the other hand, sheet-like Co3O4 was very effective to prevent the reassembly of GNS to graphite platelets, thus preserving GNS advantages during repetitive cycling.
256 citations
TL;DR: In this article, the microwave assisted synthesis of Co3O4 nanomaterials with different morphologies including nanoparticles, rod-like nanoclusters and macroporous platelets was reported.
143 citations
TL;DR: In this paper, the preparation and Li-storage properties of graphene nanosheets (GNS), GNS supported Sn-Sb@carbon (50-150 nm) and Sn-sb nanoparticles (5-10 nm).
136 citations
TL;DR: A nanoscale coating of a Si layer on the pore walls of SnO (2) nanotubes (Si-coated SnO(2)) leads to very good electrochemical performance in coulombic efficiency, rate capability and capacity retention compared with untreated SnO-(2)nanotubes.
73 citations
TL;DR: In this article, the indium tin oxide (ITO)-based nanostructures, namely ITO@carbon core-shell nanowires and jagged ITO nanowire, were reported.
Abstract: This paper reports two new indium tin oxide (ITO)-based nanostructures, namely ITO@carbon core–shell nanowire and jagged ITO nanowire. The ITO@carbon core–shell nanowires (~50 nm in diameter, 1–5 μm in length,) were prepared by a chemical vapor deposition process from commercial ITO nanoparticles. A carbon overlayer (~5–10 in thickness) was observed around ITO nanowire core, which was in situ formed by the catalytic decomposition of acetylene gas. This carbon overlayer could be easily removed after calcination in air at an elevated temperature of 700°C, thus forming jagged ITO nanowires (~40–45 nm in diameter). The growth mechanisms of ITO@carbon core–shell nanowire and jagged ITO nanowire were also suggested.
20 citations
TL;DR: In this paper, a few antimony oxide-based nanostructures were successfully synthesized by a fast microwave irradiation method including orthorhombic Sb2O3 and Sb8O11Cl2 nanorods bundles, sheet-like Sb 2O3 materials, pure SbO3 nanorod bundles, and pure S2O 3 materials.
Abstract: A few antimony oxide-based nanostructures were successfully synthesized by a fast microwave irradiation method including orthorhombic Sb2O3 and Sb8O11Cl2 nanorods bundles, sheet-like orthorhombic and cubic Sb2O3 materials, pure orthorhombic Sb2O3 nanorod bundles. All these Sb-based nanostructures were characterized by XRD, SEM and TEM. It was found that precipitator agents and irradiation conditions played important roles in the formation of Sb2O3 based nanostructures. The electrochemical properties of Sb2O3 nanorod-bundles were also preliminarily investigated.
5 citations
TL;DR: In this article, the effects of Y-doping on the magnetic, dielectric and ferroelectric properties of EuMnO(3) were carefully investigated through a series of polycrystalline Eu(1-x)Y(x)MnOs (x = 0,0.15, 0.3 and 0.5) samples prepared by solid state reaction.
5 citations
TL;DR: In this article, a tentative simulation study has been carried out on the depletion phenomenon in diblock copolymer films through dissipative particle dynamics technology, and the results indicate that a depletion layer appears in nearly all the systems with strong interaction between different components, accompanied with weak interaction between the component and the boundary.
Abstract: A tentative simulation study has been carried out on the depletion phenomenon in diblock copolymer films through dissipative particle dynamics technology. Results indicate that a depletion layer appears in nearly all the systems with strong interaction between different components, accompanied with weak interaction between the component and the boundary. The system temperature plays a dominant role in the thickness of the depletion layer, on which the component fraction also has an effect to a certain extent. The findings can give support to relevant application processes.
2 citations
TL;DR: In this paper, the mean square bond length, root-mean-square end-to-end distance and gyration radius in diblock copolymer films have been studied by dissipative particle dynamics simulations.
Abstract: Mean-square bond length, root-mean-square end-to-end distance and gyration radius in diblock copolymer films have been studied by dissipative particle dynamics simulations. Results show evident linear trends of any property separately with the thickness of film, the interaction between particles of different types, the repulsion between particle and boundary, except for the dependence of the variations of mean-square bond length on the thickness of film, which exhibits as a wave trend. What's more, the varying trends of mean-square bond length and root-mean-square end-to-end distance can correspond to each other. The density distribution of either component in diblock copolymer film can be controlled and adjusted effectively through its interaction with boundary.
1 citations
TL;DR: In this article, the relationship between mean square bond length (MSBL) and system temperature can be described as a quadratic curve, and the root-mean-square radius of gyration and end-end distance increase gradually as the temperature rises and composition fraction changes from 0.1 to 0.5.
Abstract: Temperature dependence of microscopic properties in diblock copolymer films has been investigated by dissipative particle dynamics simulations. Results show the relation between mean-square bond length (MSBL) and system temperature can be described as a quadratic curve. The root-mean-square radius of gyration (RMSGR) and end-end distance (RMSED) increase gradually as the temperature rises and composition fraction changes from 0.1 to 0.5, in which the effect of the former is primary. Especially, the relation between RMSGR and temperature is nearly linear in the confinement-introduced direction. Density distribution of each component in the films can be controlled and adjusted effectively by its interaction with other components and boundaries. Moreover, the changes of system temperature and composition fraction can both affect the density distributions to a certain extent.