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Hong Z.,Fujian Normal University | Hong Z.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Hong J.,Fujian Normal University | Xie C.,Fujian Normal University | And 3 more authors.
Electrochimica Acta | Year: 2016

In this paper, we report a one-step and additive-free route for synthesizing hierarchical rutile TiO2 with mesocrystalline structure. The rutile TiO2 architecture constructed by oriented tiny nanorod subunits (around 5 nm in diameter) have nano/submicro hierarchical structures, nanoporous nature, a relatively large surface area and high tapped density. When the hierarchical rutile TiO2 was studied as anode material for Li-ion batteries (LIBs), they exhibited a high reversible capacity of more than 250 mAh g-1 within a voltage window of 1-3 V, superior rate capability and very good cycling stability with 220 mAh g-1 after 100 cycles at 0.1 A g-1. It's notable that the hierarchical rutile TiO2 exhibited superior Li-ion storage properties under deep cycling conditions (0.01-3.0 V), a stable capacity of 346 mAh g-1 after 100 cycles at 0.1 A g-1 could be remained. The hierarchical TiO2 also displayed a large reversible capacity of more than 255 mAh g-1 (average value) at 0.05 A g-1 and good cycling performance for Na-ion insertion. These results, in combination with high volumetric storage capacity, render hierarchical rutile TiO2 a promising anode material for rechargeable batteries. © 2016 Elsevier Ltd. All rights reserved. Source


Xie H.,Fujian Normal University | Xie H.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Xie H.,Fujian Agriculture and forestry University | Lin G.-W.,East China University of Science and Technology | And 6 more authors.
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2016

Optical nonlinearities at the single-photon level are explored in a quadratically coupled optomechanical system, where the cavity frequency is coupled to the square of the mechanical displacement. The effective nonlinear interaction between photons and phonons is enhanced by a strong driving field, which allows one to implement the single-photon nonlinearities even if the single-photon coupling strength g0 is much lower than the cavity decay rate κ. The photon statistical properties are discussed by calculating the second-order correlation function both analytically and numerically. The results show that the single-photon nonlinearities are robust against mechanical thermal noise in the strong-coupling and sideband-resolved regime, and photon blockade and photon-induced tunneling can be realized with experimentally accessible parameters. © 2016 American Physical Society. Source


Xie H.,Fujian Normal University | Xie H.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Xie H.,Fujian Agriculture and forestry University | Chen X.,Fujian Normal University | And 4 more authors.
Optics Communications | Year: 2016

A scheme to correlate optical and microwave photons is proposed in a hybrid electro-optomechanical system, where mechanical resonator is coupled to both optical and microwave fields. Analytical and numerical simulation results show that the cross-correlation function between Stokes and anti-Stokes photons strongly violates the Cauchy-Schwarz inequality, which confirms the nonclassical correlation between the optical and microwave photons. It is worth noting that the nonclassical photon pairs with vast different wavelengths, which may be useful for quantum communication, are generated under the experimentally accessible weak coupling limit rather than single-photon strong coupling regime. In addition, the protocol provides a possible route to combine the respective advantages of optical photons, microwave photons, and phonons in a hybrid electro-optomechanical system. © 2016 Elsevier B.V. All rights reserved. Source


Zou M.,Fujian Normal University | Zou M.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Wen W.,Fujian Normal University | Wen W.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | And 6 more authors.
Journal of Alloys and Compounds | Year: 2016

In order to overcome the intrinsic drawbacks of V2O5, including the intrinsically low electrical conductivity and slow electrochemical kinetics, V2O5 nanospheres are uniformly mixed with the electric Cu nanoparticles for forming V2O5/Cu composites. As used as an cathode material for LIBs, the V2O5/Cu composite demonstrated obviously improved electrochemical performance including high reversible specific capacity, superior rate capability and outstanding cycling stability. The V2O5/Cu cathodes can afford a high reversible capacity of 186 mAh g-1 after 70 cycles under a current density of 300 mA g-1 and good rate performance. Even at a high current density of 5 A g-1, a high reversible capacity of 101 mAh g-1 after 350 cycles can still remain. The improved performance can be contributed from the decorated Cu nanoparticles, which can result in a good contact in active materials and facilitate transportation of the electron into the inner region of the electrode. © 2016 Elsevier B.V. All rights reserved. Source


Chen G.,Fujian Normal University | Chen G.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Wang W.,Fujian Normal University | Zhao J.,Fujian Normal University | And 7 more authors.
Journal of Alloys and Compounds | Year: 2016

The future development of Cu3SbS4 as an alternative absorber for low cost and high efficiency thin film solar cell depends strongly on the understanding of the formation of mechanism in this system. With this aim, a detailed characterization of Cu3SbS4 particles prepared by microwave irradiation is presented, combining XRD, SEM, and EDX. The development of Cu3SbS4 formation with the increasement of temperature and the prolongation of time are investigated by depth-resolved analysis. Under such conditions, a reaction pathway for the formation of Cu3SbS4 from binary and CuSbS2 compounds as intermediates is proposed. The experimental data supports a formation mechanism of Cu3SbS4 that proceeds rapidly when the CuSbS2 react with the remaining binary phases CuS. During reaction Cu is completely consumed, while Sb is lost through the way of Sb2S3 vapor. © 2016 Elsevier B.V. All rights reserved. Source

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