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Open Access Publications from the University of California

Material/element-dependent fluorescence-yield modes on soft X-ray absorption spectroscopy of cathode materials for Li-ion batteries

  • Author(s): Asakura, D;
  • Hosono, E;
  • Nanba, Y;
  • Zhou, H;
  • Okabayashi, J;
  • Ban, C;
  • Glans, PA;
  • Guo, J;
  • Mizokawa, T;
  • Chen, G;
  • Achkar, AJ;
  • Hawthron, DG;
  • Regier, TZ;
  • Wadati, H
  • et al.

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We evaluate the utilities of fluorescence-yield (FY) modes in soft X-ray absorption spectroscopy (XAS) of several cathode materials for Li-ion batteries. In the case of total-FY (TFY) XAS for LiNi0.5Mn1.5O4, the line shape of the Mn L3-edge XAS was largely distorted by the self-absorption and saturation effects, while the distortions were less pronounced at the Ni L3 edge. The distortions were suppressed for the inverse-partial-FY (IPFY) spectra. We found that, in the cathode materials, the IPFY XAS is highly effective for the Cr, Mn, and Fe L edges and the TFY and PFY modes are useful enough for the Ni L edge which is far from the O K edge.

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