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Characterization of dynamic morphological changes of tin anode electrode during (de)lithiation processes using in operando synchrotron transmission X-ray microscopy

Journal Article · · Electrochimica Acta
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  1. Indiana Univ.-Purdue Univ., Indianapolis, IN (United States)
  2. Shanghai Jiao Tong Univ. (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Zhengzhou Univ. (China)
The morphological evolution of tin particles with different sizes during the first lithiation and delithiation processes has been visualized by an in operando synchrotron transmission X-ray microscope (TXM). Here, the in operando lithium ion battery cell was operated at constant current condition during TXM imaging. Two-dimensional projection images with 40 nm resolution showing morphological evolution were obtained and analyzed. The analysis of relative area change shows that the morphology of tin particles with different sizes changed simultaneously. This phenomenon is mainly because of a negative feedback mechanism among tin particles in the battery electrode at a constant current operating condition. For irregular-shaped tin particles, the contour analysis demonstrates that the regions with higher curvature started volume expansion first, and then the entire particle expanded almost homogeneously. This study provides insights for understanding the dynamic morphological change and the particle-particle interactions in high capacity lithium ion battery electrodes.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
National Science Foundation; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357; SC0012704
OSTI ID:
1571427
Alternate ID(s):
OSTI ID: 1691859
Report Number(s):
BNL--212230-2019-JAAM
Journal Information:
Electrochimica Acta, Journal Name: Electrochimica Acta Journal Issue: C Vol. 314; ISSN 0013-4686
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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