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Ni S.,China Three Gorges University | Ni S.,Collaborative Innovation Center for Microgrid of New Energy | Ma J.,China Three Gorges University | Lv X.,China Three Gorges University | And 4 more authors.
Journal of Materials Chemistry A | Year: 2014

A NiV3O8/Ni composite was successfully prepared via a novel in situ corrosion method, which shows good electrochemical performance as a new sort of anode for Li-ion batteries. After 60 cycles at various rates from 0.1 to 20 C, the discharge capacity can be restored when the charge-discharge rate is lowered to 0.1 C. © 2014 the Partner Organisations.


Tao H.-C.,China Three Gorges University | Tao H.-C.,Collaborative Innovation Center for Microgrid of New Energy | Yang X.-L.,China Three Gorges University | Yang X.-L.,Collaborative Innovation Center for Microgrid of New Energy | And 4 more authors.
Journal of Physics and Chemistry of Solids | Year: 2014

CuS/graphene composite has been synthesized by the one-pot hydrothermal method using thiourea as the sulfur source and reducing agent. The formation of CuS nanoparticles and the reduction of graphene oxide occur simultaneously during the hydrothermal process, which enables a uniform dispersion of CuS nanoparticles on the graphene nanosheets. The electrochemical performance of CuS/graphene composite was studied as anode materials for lithium ion batteries. The obtained CuS/graphene composite exhibits a relative high reversible capacity and good cycling stability. The good electrochemical performance of CuS/graphene composite can be attributed to graphene, which improves the electronic conductivity of composite and enhances the interfacial stability of electrode and electrolyte. © 2014 Elsevier Ltd.


Ni S.,China Three Gorges University | Ni S.,Collaborative Innovation Center for Microgrid of New Energy | Ma J.,China Three Gorges University | Zhang J.,China Three Gorges University | And 4 more authors.
Electrochimica Acta | Year: 2015

A low cost and facile way was developed to prepare high performance Fe2O3/natural graphite electrode for lithium ion batteries. For the purpose of reducing the cost and improving the feasibility of large-scale fabrication, commercial ferric oxide and natural graphite were adopted as raw materials and mechanical milling was adopted as preparation method in material fabrication process, and water soluble sodium alginate was adopted as binder in electrode preparation procedure. The Fe2O3/natural graphite electrode delivers initial discharge and charge capacity of 943.8 and 691.4 mAh g-1 at a specific current of 72 mA g-1, maintaining of 687.6 and 679.3 mAh g-1 after 100 cycles. After 60 cycles at various specific currents from 104 to 3470 mA g-1, the discharge and charge capacity of the Fe2O3/natural graphite electrode can restore well when lowering the specific current to 104 mA g-1. A novel electrochemical reconstruction between Fe2O3 and natural graphite was observed for the electrode after cycling, which results in the formation of an integrated architecture with good combination between Fe2O3 and natural graphite, being responsible for the good electrochemical performance. © 2014 Elsevier Ltd. All rights reserved.


Liu F.R.,Collaborative Innovation Center for Microgrid of New Energy | Liu F.R.,China Three Gorges University | Tang S.Q.,Collaborative Innovation Center for Microgrid of New Energy | Tang S.Q.,China Three Gorges University | Chen C.P.,China Three Gorges University
Advanced Materials Research | Year: 2014

The dynamic positioning (DP) vessel maintains its position and heading by active thrusters. For safety reasons, DP vessels are typically designed with redundancy thrusters more than needed for motion control. Optimization theories are useful in finding thrust allocation solutions that minimize fuel consumption and reduce “wear and tear” on a thruster. But several challenges exist such as uncertain thruster model, thruster dynamics characters and the individual limitations of the thrusters. In this paper, a dynamic thrust allocation scheme is presented based on model predictive control (MPC) that directly takes thrusters with dynamics characters and various constraints into account. It is shown in simulations that the MPC dynamic thrust allocation scheme performs better in comparison with an existing static allocation method. Its main advantage is the ability to handle thruster dynamics characters and various constraints. © (2014) Trans Tech Publications, Switzerland.


Tao H.-C.,China Three Gorges University | Tao H.-C.,Collaborative Innovation Center for Microgrid of New Energy | Yang X.-L.,China Three Gorges University | Yang X.-L.,Collaborative Innovation Center for Microgrid of New Energy | And 4 more authors.
Materials Chemistry and Physics | Year: 2014

Chemically activated graphene/porous Si@SiOx (CAG/Si@SiO x) composite has been synthesized via magnesiothemic reduction of mesoporous SiO2 (MCM-48) to porous Si@SiOx and dispersing in the suspension of chemically activated graphene oxide (CAGO) followed by thermal reduction. The porous Si@SiOx particles are well encapsulated in chemically activated graphene (CAG) matrix. The resulting CAG/Si@SiO x composite exhibits a high reversible capacity and excellent cycling stability up to 763 mAh g-1 at a current density of 100 mA g -1 after 50 cycles. The porous structure of CAG layer and Si@SiO x is beneficial to accommodate volume expansion of Si during discharge and charge process and the interconnected CAG improves the electronic conductivity of composite. © 2014 Elsevier B.V. All rights reserved.


He K.D.,China Three Gorges University | He K.D.,Collaborative Innovation Center for Microgrid of New Energy | Fang Z.F.,China Three Gorges University | Zhang Y.,China Three Gorges University | Yang W.H.,China Three Gorges University
Applied Mechanics and Materials | Year: 2014

The computational model for underwater monitoring platform with drag force, normal lift along flow and buoyancy was formulated aimed at dynamic characteristic by the finite computing method of structure vibration modal on flow field and infinitesimal method idea, and taking into account the influence of flow force to structures dynamic characteristic. Discuss the influencing factors for natural frequency of underwater monitoring platform by numerical analysis method. Natural frequency of buoy was far from the vortex release frequency by adjusting the influencing factors. This method can effectively decrease the vibration by resonance and it has important significance to design the underwater monitoring platform. © (2014) Trans Tech Publications, Switzerland.


Tao H.-C.,China Three Gorges University | Tao H.-C.,Collaborative Innovation Center for Microgrid of New Energy | Zhu S.-C.,China Three Gorges University | Yang X.-L.,China Three Gorges University | And 5 more authors.
Journal of Electroanalytical Chemistry | Year: 2015

Reduced graphene oxide (RGO) decorated ternary Cu2SnS3 composite has been synthesized by one-step facile hydrothermal route. The formation of Cu2SnS3 nanoparticles and reduction of graphene oxide occur at the same time during the hydrothermal process. The Cu2SnS3 nanoparticles with a size of 5-10nm are uniformly distributed on the RGO, which prevents effectively the agglomeration of Cu2SnS3 nanoparticles. The Cu2SnS3/RGO composite electrode exhibits an initial reversible capacity of 704mAhg-1 and 560mAhg-1 after 100cycles. Such excellent electrochemical performance can be attributed to the presence of RGO, which improves the electronic conductivity and prevents the agglomeration of Cu2SnS3 nanoparticles. In addition, the Cu induced by the Cu2SnS3 reaction with lithium ions during the discharge process can increase the electronic conductivity. © 2015.

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