Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session B11: Energy Storage Methods
11:15 AM–2:15 PM,
Monday, March 15, 2010
Sponsoring Unit: GERA
Chair: Timo Thonhauser, Wake Forest University
Abstract ID: BAPS.2010.MAR.B11.3
Abstract: B11.00003 : Effects of Anisotropic Coherency Strain on Intercalation in Phase-Separating Crystals*
11:39 AM–11:51 AM
Preview Abstract Abstract
(Lawrence Livermore National Laboratory)
We consider the self-organization of intercalating particles within crystals induced by spinodal decomposition and the anisotropy of coherency strains, motivated by recent Li-ion battery materials. A phase-field model is developed which incorporates the energetic contributions from the entropy, enthalpy and elastic properties of the host material. Bulk dynamics of the system is then analyzed using linear stability theory to obtain spinodal regions in the parameter space, and numerical simulations are used to predict long-term evolution and relaxational steady-states. These results may explain the alignment of the phase boundary with phosphate planes in LiFePO4, as assumed in recent models and observed in experiments.
*Part of this work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.B11.3
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