Complex Impedance Spectra of Polymer-Derived Silicon Oxycarbides

    Authors

    K. W. Wang; B. S. Ma; Y. G. Wang;L. N. An

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    LITHIUM-ION BATTERIES; CERAMICS; PIEZORESISTIVITY; TEMPERATURES; TRANSPORT; Materials Science, Ceramics

    Abstract

    The complex impedance spectra of polymer-derived amorphous silicon oxycarbides synthesized at different temperatures are reported. Analysis of the spectra using equivalent circuit models showed that the conduction of current is dominantly through the matrix and free carbon in series, instead of through the matrix or free carbon only. We found that the conductivity of both matrix and free-carbon phase increases with increasing synthesis temperature, whereas the relaxation time of the matrix is much shorter than that of the free carbon. The results are correlated with the structures of the materials.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    96

    Issue/Number

    5

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    1363

    Last Page

    1365

    WOS Identifier

    WOS:000318801400008

    ISSN

    0002-7820

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