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  • Open Access


    Theoretical Study of Solvation Effect on Diffusion Coefficient of Li Ion in Propylene Carbonate

    Kentaro Doi1,2, Yuzuru Chikasako1, Satoyuki Kawano1,3

    FDMP-Fluid Dynamics & Materials Processing, Vol.11, No.1, pp. 1-26, 2015, DOI:10.3970/fdmp.2015.011.001

    Abstract Propylene carbonate (PC) and ethylene carbonate are known as good candidates of organic solvents to be used in Li-ion rechargeable batteries, since Li+ ions exhibit preferable charge-discharge characteristics with such solvents. On the other hand, polar solvents usually form solvation shells with solute ions, and cause a drastic reduction of ionic conductivity. Along these lines, there has been a curious question why the diffusion coefficient DLi of Li+ strongly depends on the salt concentration. In the present study, a theoretical model is developed on the basis of the Langevin equation in which the interactions between ions and solvent molecules are… More >

  • Open Access


    Research on SFLA-Based Bidirectional Coordinated Control Strategy for EV Battery Swapping Station

    Guo Zhao1,2, Jiang Guo1,2, Hao Qiang3

    CMC-Computers, Materials & Continua, Vol.53, No.4, pp. 343-356, 2017, DOI:10.3970/cmc.2017.053.343

    Abstract As a good measure to tackle the challenges from energy shortages and environmental pollution, Electric Vehicles (EVs) have entered a period of rapid growth. Battery swapping station is a very important way of energy supply to EVs, and it is urgently needed to explore a coordinated control strategy to effectively smooth the load fluctuation in order to adopt the large-scale EVs. Considering bidirectional power flow between the station and power grid, this paper proposed a SFLA-based control strategy to smooth the load profile. Finally, compared simulations were performed according to the related data. Compared to particle swarm optimization (PSO) method,… More >

  • Open Access


    Molecular Dynamics Analysis of High-temperature Molten-salt Electrolytes in Thermal Batteries

    C. F. Chen1, H. Y. Li1, C. W. Hong1,2

    CMC-Computers, Materials & Continua, Vol.46, No.3, pp. 145-163, 2015, DOI:10.3970/cmc.2015.046.145

    Abstract The purpose of this research is to improve the discharge rate and to predict the melting point of high-temperature molten-salt electrolytes in thermal batteries. Using molecular dynamics (MD) simulation techniques, we tried to develop some novel ternary and quaternary molten electrolytes to replace conventional binary LiCl-KCl ones. The simulation results with greater ionic conductivity and lower melting point are consistent with experimental results reported by previous literatures. The MD results have found that the lithium ion mole fraction in the molten-salt electrolytes affects the ionic conductivity significantly. This paper demonstrates that MD simulation techniques are a useful tool to screen… More >

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