Size-dependent phase morphologies in LiFePO4 battery particles
Name
1808.06164.pdf
Description
Submitted version
Size
2.24 MB
Format
Adobe PDF
Checksum (MD5)
8d6d8315f02ae3b98c5612e74761a5bc
Author(s)
Cogswell, Daniel Aaron
Bazant, Martin Z
Date Issued
October 2018
Journal
Electrochemistry Communications
Publisher
Elsevier BV
Citation
Cogswell, Daniel A. and Martin Z. Bazant. "Size-dependent phase morphologies in LiFePO4 battery particles." Electrochemistry Communications 95 (October 2018): 33-37 © 2018 Elsevier B.V.
Version
Original manuscript
Abstract
Lithium iron phosphate (LiFePO4) is the prototypical two-phase battery material whose complex patterns of lithium ion intercalation provide a testing ground for theories of electrochemical thermodynamics. Using a depth-averaged (a-b plane) phase-field model of coherent phase separation driven by Faradaic reactions, we reconcile conflicting experimental observations of diamond-like phase patterns in micron-sized platelets with observations of surface-controlled patterns in nanoparticles. Elastic analysis predicts this morphological transition for particles whose a-axis dimension exceeds twice the bulk elastic stripe period. We also simulate a rich variety of non-equilibrium patterns, influenced by size-dependent spinodal points and electro-autocatalytic control of thermodynamic stability.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mathematics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.elecom.2018.08.015
