Local Structure and Stability of SEI in Graphite and ZFO Electrodes Probed by As K-edge Absorption Spectroscopy - Publication - Bridge of Knowledge

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Local Structure and Stability of SEI in Graphite and ZFO Electrodes Probed by As K-edge Absorption Spectroscopy

Abstract

The evolution of the solid electrolyte interphase (SEI) during the first Li uptake in advanced Li-ion electrodes is studied by X-ray absorption spectroscopy (XAS). The As atoms present in the electrolyte solution were used as a local probe for monitoring the SEI growth on different electrodes. High-quality As K-edge spectra were collected in fluorescence mode for a set of graphite and carbon-coated ZnFe2O4 electrodes. XAS measurements have been preceded and corroborated by electrochemical characterizations. SEI phase evolution was analyzed by distinct As valence states in the subsequent stages of SEI formation, while X-ray fluorescence (XRF) was used to estimate the As content. Detailed structural results are presented for different Li contents in different electrodes including the estimated thickness of the SEI layer, contribution of different As oxidation states, and As local structure. The formation of AsFN complexes with different local coordination N is clearly observed and measured at various SEI evolution stages. Evidence of a partially reversed redox process, taking place within the SEI by charge − discharge cycling, was also obtained.

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Authors (12)

  • Photo of dr Rezvani Javad Seyed

    Rezvani Javad Seyed dr

    • University of Camerino Physics Division
  • Photo of  Matteo Ciambezi

    Matteo Ciambezi

    • University of Camerino Physics Division
  • Photo of  Roberto Gunnella

    Roberto Gunnella

    • University of Camerino Physics Division
  • Photo of  Marco Minicucci

    Marco Minicucci

    • University of Camerino Physics Division
  • Photo of  Miguel Munoz-Marquez

    Miguel Munoz-Marquez

    • CIC Energigune Parque Tecnólogico de Álava
  • Photo of dr Francesco Nobili

    Francesco Nobili dr

    • University of Camerino Chemistry Division
  • Photo of  Marta Pasqualini

    Marta Pasqualini

    • University of Camerino Chemistry Division
  • Photo of  Stefano Passerini

    Stefano Passerini

    • Karlsruhe Institute of Technology Helmholtz Institute Ulm
  • Photo of  Christian Schreiner

    Christian Schreiner

    • Technology and Innovation SGL Carbon
  • Photo of  Angela Trapananti

    Angela Trapananti

    • University of Perugia CNR-Istituto Officina dei Materiali
  • Photo of prof. Andrea DiCicco

    Andrea DiCicco prof.

    • University of Camerino Physics Division

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
Journal of Physical Chemistry C no. 120, pages 4287 - 4295,
ISSN: 1932-7447
Language:
English
Publication year:
2016
Bibliographic description:
Seyed R., Ciambezi M., Gunnella R., Minicucci M., Munoz-Marquez M., Nobili F., Pasqualini M., Passerini S., Schreiner C., Trapananti A., Witkowska A., Dicicco A.: Local Structure and Stability of SEI in Graphite and ZFO Electrodes Probed by As K-edge Absorption Spectroscopy// Journal of Physical Chemistry C. -Vol. 120, nr. 8 (2016), s.4287-4295
DOI:
Digital Object Identifier (open in new tab) 10.1021/acs.jpcc.5b11798
Verified by:
Gdańsk University of Technology

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