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E. Scott, G. Tam, B. Anderson and C. Schmidt, “Anomalous Potentials in Lithium Ion Cells: Making the Case for 3-D Modeling of 3-D Systems,” The Electrochemical Society Meeting, Orlando, 13 October 2003.

has been cited by the following article:

  • TITLE: Two-Dimensional Lithium-Ion Battery Modeling with Electrolyte and Cathode Extensions

    AUTHORS: Glyn F. Kennell, Richard W. Evitts

    KEYWORDS: Lithium-Ion Cell; Mathematical Modeling; Cathode Extension; Electrolyte Extension; Current Distributions; Electric and Concentration Fields

    JOURNAL NAME: Advances in Chemical Engineering and Science, Vol.2 No.4, November 1, 2012

    ABSTRACT: A two-dimensional model for transport and the coupled electric field is applied to simulate a charging lithium-ion cell and investigate the effects of lithium concentration gradients within electrodes on cell performance. The lithium concentration gradients within electrodes are affected by the cell geometry. Two different geometries are investigated: extending the length of the electrolyte past the edges of the electrodes and extending the length of the cathode past the edge of the anode. It is found that the electrolyte extension has little impact on the behavior of the electrodes, although it does increase the effective conductivity of the electrolyte in the edge region. However, the extension of the cathode past the edge of the anode, and the possibility for electrochemical reactions on the flooded electrode edges, are both found to impact the concentration gradients of lithium in electrodes and the current distribution within the electrolyte during charging. It is found that concentration gradients of lithium within electrodes may have stronger impacts on electrolytic current distributions, depending on the level of completeness of cell charge. This is because very different gradients of electric potential are expected from similar electrode gradients of lithium concentrations at different levels of cell charge, especially for the LixC6 cathode investigated in this study. This leads to the prediction of significant electric potential gradients along the electrolyte length during early cell charging, and a reduced risk of lithium deposition on the cathode edge during later cell charging, as seen experimentally by others.