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In Situ Three-Dimensional Synchrotron X-Ray Nanotomography of the (De)lithiation Processes in Tin Anodes

Authors

  • Dr. Jiajun Wang,

    1. Photon Sciences Directorate, Brookhaven National Laboratory, Building 744, Upton, NY (USA)
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    • These authors contributed equally to this work.

  • Dr. Yu-chen Karen Chen-Wiegart,

    1. Photon Sciences Directorate, Brookhaven National Laboratory, Building 744, Upton, NY (USA)
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    • These authors contributed equally to this work.

  • Dr. Jun Wang

    Corresponding author
    1. Photon Sciences Directorate, Brookhaven National Laboratory, Building 744, Upton, NY (USA)
    • Photon Sciences Directorate, Brookhaven National Laboratory, Building 744, Upton, NY (USA)

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  • We acknowledge Biqiong Wang and Prof. Xueliang Sun (Western University, Canada) for providing the Sn sample for this study. This work was supported by a Laboratory Directed Research and Development (LDRD) project at Brookhaven National Laboratory. Use of the NSLS was supported by the U.S. Department of Energy, Office of Basic Energy Science (DE-AC02-98CH10886).

Abstract

The three-dimensional quantitative analysis and nanometer-scale visualization of the microstructural evolutions of a tin electrode in a lithium-ion battery during cycling is described. Newly developed synchrotron X-ray nanotomography provided an invaluable tool. Severe microstructural changes occur during the first delithiation and the subsequent second lithiation, after which the particles reach a structural equilibrium with no further significant morphological changes. This reveals that initial delithiation and subsequent lithiation play a dominant role in the structural instability that yields mechanical degradation. This in situ 3D quantitative analysis and visualization of the microstructural evolution on the nanometer scale by synchrotron X-ray nanotomography should contribute to our understanding of energy materials and improve their synthetic processing.

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