Suppression of Phase Separation in LiFePO 4 Nanoparticles During Battery Discharge
Name
Bazant_Suppression phase.pdf
Size
2.96 MB
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Adobe PDF
Checksum (MD5)
091392e0c0f233e76f9d5a4566b31115
Author(s)
Bai, Peng
Cogswell, Daniel A.
Date Issued
October 2011
Journal
Nano Letters
Publisher
American Chemical Society
Citation
Bai, Peng, Daniel A. Cogswell, and Martin Z. Bazant. “Suppression of Phase Separation in LiFePO₄ Nanoparticles During Battery Discharge.” Nano Letters 11.11 (2011): 4890–4896. CrossRef. Web.
Version
Author's final manuscript
Abstract
Using a novel electrochemical phase-field model, we question the common belief that LiXFePO₄ nanoparticles always separate into Li-rich and Li-poor phases during battery discharge. For small currents, spinodal decomposition or nucleation leads to moving phase boundaries. Above a critical current density (in the Tafel regime), the spinodal disappears, and particles fill homogeneously, which may explain the superior rate capability and long cycle life of nano-LiFePO₄ cathodes.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mathematics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/nl202764f
