Electronic structure of Li2Fe1-xMnxP 2O7 for lithium-ion battery studied by resonant photoemission spectroscopy

Koji Horiba, Shota Ito, Shodai Kurosumi, Naoka Nagamura, Satoshi Toyoda, Hiroshi Kumigashira, Masaharu Oshima, Naoya Furuta, Shin Ichi Nishimura, Atsuo Yamada, Noritaka Mizuno

    Research output: Contribution to journalConference articlepeer-review

    2 Citations (Scopus)

    Abstract

    In order to clarify changes in the electronic structures, especially Fe partial density of states (DOS), of Li2Fe1-xMnxP2O7 with Mn substitution, we have performed x-ray absorption spectroscopy and resonant photoemission spectroscopy (RPES) experiments for Li2Fe1-xMnxP2O7. Using RPES teqniques, we have succeeded in extracting the Fe2+ partial DOS. We have found the systematic shift to higher binding energy and broadening of Fe 3d t2g down-spin states accompanying with the Mn substitution. The peak shift of the Fe 3d t2g down-spin states is matched very well to the change of Fe3+/Fe 2+ redox potential, suggesting that the origin of high Fe 3+/Fe2+ redox potential in Li2Fe1-xMnxP2O7 is the shift of the Fe 3d t2g down-spin states to the higher binding energy with Mn substitution.

    Original languageEnglish
    Article number012004
    JournalJournal of Physics: Conference Series
    Volume502
    Issue number1
    DOIs
    Publication statusPublished - 2014
    Event1st Conference on Light and Particle Beams in Materials Science 2013, LPBMS 2013 - Tsukuba, Japan
    Duration: 2013 Aug 292013 Aug 31

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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