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  • The Electrochemical Society  (4)
  • Chen, Long-Qing  (4)
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  • The Electrochemical Society  (4)
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  • 1
    Online Resource
    Online Resource
    Understanding and Predicting the Lithium Dendrite Formation in Li-Ion Batteries: Phase Field Model
    The Electrochemical Society ; 2014
    In:  ECS Transactions Vol. 61, No. 8 ( 2014-09-17), p. 1-9
    Details
    In: ECS Transactions, The Electrochemical Society, Vol. 61, No. 8 ( 2014-09-17), p. 1-9
    Abstract: Lithium (Li) dendrite formation compromises the reliability of Li-metal batteries, either because dendrite pieces lose electrical contract or growing dendrite penetrates the separator and leads to internal short-circuiting. In this paper, a nonlinear phase-field model is formulated to predict Li dendrite formation at the electrode/electrolyte interface. The phase field evolves by electrochemical reaction of which the rate depends on nonlinearly the thermodynamics driving force involving overpotential and ion concentration. A revised Poisson-Nesters-Planck Equation is further solved for ionic transport and local overpotential variation. The model is validated by 1-D fields distribution involving phase field, Lithium ion concentration and electrostatic potential. The 2-D tree-type lithium dendrite during Li deposition was produced if anisotropic surface energy is assumed. Finally, the 2D morphological evolution under different electrochemical conditions specified by the charging current density, and the anisotropy of surface energy was discussed.
    Type of Medium: Online Resource
    ISSN: 1938-5862 , 1938-6737
    URL: Article
    DOI: 10.1149/06108.0001ecst
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2014
    Location Call Number Limitation Availability
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Diffusion Mechanisms in the Solid Electrolyte Interphase in Li-Ion Batteries from First Principle Calculation
    The Electrochemical Society ; 2014
    In:  ECS Meeting Abstracts Vol. MA2014-01, No. 3 ( 2014-04-01), p. 335-335
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2014-01, No. 3 ( 2014-04-01), p. 335-335
    Abstract: The understanding of the mechanisms of Li-ion transport and electron leakage through the solid electrolyte interphase (SEI) layer is crucial to enhance the performance of rechargeable Li-ion batteries. Our study was based on a slab model of Li metal covered by Li 2 CO 3 with contact with ethylene carbonate (EC) electrolyte. Pure Li metal is an ideal negative electrode for its high capacity and low voltage level. The layer of crystalline Li 2 CO 3 was used to mimic the SEI layer, since our recent recognition by TEM that Li 2 CO 3 was the component responsible for stabilizing the SEI. The barriers for Li and electron transport under applied voltage will be computed within the framework of DFT and constrained-DFT to understand the mechanism in electrochemical systems. Ab inito molecular dynamics (AIMD) simulations will be performed to explicitly track Li + diffusion pathways. Energy profiles as a function of the electric field during this reduction reaction will be determined to understand the effects of electric field on the diffusion barrier.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2014-01/3/335
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2014
    detail.hit.zdb_id: 2438749-6
    Location Call Number Limitation Availability
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Understanding and Predicting Li Dendrite Formation in Li-Ion Batteries: Phase Field Model
    The Electrochemical Society ; 2014
    In:  ECS Meeting Abstracts Vol. MA2014-01, No. 3 ( 2014-04-01), p. 322-322
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2014-01, No. 3 ( 2014-04-01), p. 322-322
    Abstract: Lithium dendrite formation can lead the degradation and failure of Lithium ion battery, either because dendrite pieces lose electrical contract with the rest of the Li electrode (typically during Li stripping on discharge) or because growing dendrite can penetrate the separator and lead to internal short-circuiting. In this presentation, we will discuss a nonlinear phase-field model for the Li electrochemical deposition process to predict the conditions for dendrite formation along with their morphology. The model incorporates microstructure and evolution of the anode, the SEI (solid-electrolyte interphase layer) and the Li metal phase as functions of temperature, current density and history. It also describes the effect of electrode geometry on the nucleation and growth of Li-deposits. The simulation will suggest the optimum electrode geometry to prevent the Lithium dendrite formation. The 2D morphological evolution during Li deposition under different electrochemical conditions specified by charging current density, the ionic concentrations, reaction rate and applied potentials at the electrodes will be discussed.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2014-01/3/322
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2014
    detail.hit.zdb_id: 2438749-6
    Location Call Number Limitation Availability
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Phase-Field Modeling of Li Deposits Growth in Li-Ion Batteries
    The Electrochemical Society ; 2013
    In:  ECS Meeting Abstracts Vol. MA2013-02, No. 8 ( 2013-10-27), p. 579-579
    Details
    In: ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2013-02, No. 8 ( 2013-10-27), p. 579-579
    Abstract: Abstract not Available.
    Type of Medium: Online Resource
    ISSN: 2151-2043
    URL: Article
    DOI: 10.1149/MA2013-02/8/579
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2013
    detail.hit.zdb_id: 2438749-6
    Location Call Number Limitation Availability
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    Online Resource
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