For more information about this meeting, contact Fei Wang, Hope Shaffer, Jinchao Xu, Toan Nguyen.
|Title:||Phase Field Modeling of Electrodeposition in Electrochemical systems and its application Li Dendrite Formation in Li-ion Batteries|
|Seminar:||CCMA PDEs and Numerical Methods Seminar Series|
|Speaker:||Lei Chen, Department of Materials Science and Engineering, PSU|
|We have developed a nonlinear phase-field model of electrodepostion in electrochemical systems. The main thermodynamic driving forces for the electrode-electrolyte interface evolution are limited to local variations of overpotential and chemical potential. Its application to the half-cell of lithium ion batteries explicitly describes ions diffusion in the electrolyte, cations deposition on the electrode surface and an electrochemical reaction at the electrode-electrolyte interface during charging operations. The lithium electrodeposition rate exactly follows the classical Butler-Volmer kinetic with exponentially and linearly depending on local variations of overpotential and cation concentration at the electrode surface, respectively. Simulation results show that the growth of dendritic deposit in electrochemical systems is well captured by the proposed diffuse-interface model. The longer and thicker deposits are observed both for larger charged current densities and reaction rate constants where the surface reaction rate is high.|
Room Reservation Information
|Date:||02 / 14 / 2014|
|Time:||03:30pm - 05:00pm|