Origin and hysteresis of lithium compositional spatiodynamics within battery primary particles
Name
Bazant_Origin and hysteresis.pdf
Size
3.89 MB
Format
Adobe PDF
Checksum (MD5)
e92546293e34c880916c19fa26f90b1a
Author(s)
Lim, J.
Li, Y.
Alsem, D. H.
So, H.
Lee, S. C.
Liu, X.
Jin, N.
Yu, Y.-s.
Salmon, N. J.
Shapiro, D. A.
Date Issued
August 2016
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Lim, J. et al. “Origin and Hysteresis of Lithium Compositional Spatiodynamics within Battery Primary Particles.” Science 353.6299 (2016): 566–571.
Version
Author's final manuscript
Abstract
The kinetics and uniformity of ion insertion reactions at the solid/liquid interface govern the rate capability and lifetime, respectively, of electrochemical devices such as Li-ion batteries. We develop an operando X-ray microscopy platform that maps the dynamics of the Li composition
and insertion rate in Li[subscript X]FePO[subscript 4], and show that nanoscale spatial variations in rate and in composition control the lithiation pathway at the sub-particle length scale. Specifically, spatial variations in the insertion rate constant lead to the formation of nonuniform domains, and the composition dependence of the rate constant amplifies nonuniformities during delithiation but suppresses them during lithiation, and moreover stabilizes the solid solution during lithiation. This coupling of lithium composition and surface reaction rates controls the kinetics and uniformity during electrochemical ion insertion.
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/10.1126/science.aaf4914
