Structural and Mechanistic Revelations on an Iron Conversion Reaction from Pair Distribution Function Analysis

Authors

  • Dr. Badri Shyam,

    1. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
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  • Dr. Karena W. Chapman,

    Corresponding author
    1. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
    • X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
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  • Dr. Mahalingam Balasubramanian,

    1. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
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  • Dr. Robert J. Klingler,

    1. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
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  • Dr. George Srajer,

    1. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
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  • Dr. Peter J. Chupas

    1. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 (USA)
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  • Work done at Argonne and use of the Advanced Photon Source (APS), an Office of Science User Facility operated for the U.S. DOE Office of Science by Argonne National Laboratory, were supported by the U.S. DOE under Contract No. DE-AC02-06CH11357. The electrochemistry laboratory maintained by the Structural Science group at the APS is jointly supported by Argonne and the Northeastern Center for Chemical Energy Storage, an Energy Frontier Research Center funded by the U.S. DOE under award No. DE-SC0001294. We acknowledge discussions with K. Wiaderek, S. Pol, O. Borkiewicz, R. Winans, K. Nemeth, S. Heald, and G. Sandi-Tapia.

Abstract

original image

Not simply small particles: Pair distribution function analysis (see picture) yields comprehensive insights into the electrochemical reaction of α-Fe2O3 with lithium. The metallic Fe formed in this reaction was found to be defect-rich nanoparticles that restructure continuously without growing—an unusual characteristic likely linked to its highly reversible capacity.

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