<i>Operando</i> Soft X-ray Emission Studies of Lithium-Ion Batteries

DOI Web Site Web Site 10 References
  • ASAKURA Daisuke
    Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology
  • HOSONO Eiji
    Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology
  • HARADA Yoshihisa
    Institute for Solid State Physics, The University of Tokyo

Bibliographic Information

Other Title
  • オペランド軟X 線発光分光によるリチウムイオン電池の研究
  • オペランドナンXセン ハッコウ ブンコウ ニ ヨル リチウムイオン デンチ ノ ケンキュウ

Search this article

Description

We developed operando soft X-ray emission spectroscopy (XES) techniques to accurately investigate the redox reactions and electronic structures of cathode materials of lithium-ion batteries. The operando cell consists of a special electrode tip with Si3N4 membrane window, Li-metal counter electrode and electrolyte solution. Operando Mn 2p XES for LiMn2O4 thin film with electrochemical charge/discharge reactions was performed using ultrahigh-resolution XES spectrometer at BL07LSU of SPring-8. The XES spectra showed a reversible Mn 3d electronic-structure change during the charge-discharge process. A redox reaction of Mn3+ ⇔ Mn4+ by charge/discharge was revealed. We also found a strong charge-transfer effect between the Mn 3d and O 2p orbitals for the Mn4+ state. The change of the charge-transfer effect between the Mn3+ and Mn4+ states suggests the Mn-O bond strength should change during charge-discharge process, which would be related to degradation of the cycle performance.

Journal

  • Hyomen Kagaku

    Hyomen Kagaku 37 (2), 66-71, 2016

    The Surface Science Society of Japan

References(10)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top