Spectroscopic and chemical imaging analysis of lithium iron triphosphate

C. V. Ramana, A. Ait-Salah, S. Utsunomiya, J. F. Morhange, A. Mauger, F. Gendron, C. M. Julien

研究成果: Contribution to journalArticle査読

45 被引用数 (Scopus)

抄録

A novel material, namely, Fe-containing lithium-metal triphosphate (LiM2P3O10; M=Fe), has been synthesized by wet-chemical method. The phase shows the monoclinic structure (P2 1/m≡C2h2)- The crystal chemistry and chemical structural characteristics have been analyzed by X-ray-diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). Surface chemical composition, valence state, and chemical bonding and local structure analysis have been performed by X-ray photoelectron (XPS) and Raman scattering (RS) spectroscopy. EDS and HAADF-STEM indicate the chemical homogeneity and purity of LiFe2P3O10 samples. Both XPS and RS experiments show the existence of an amorphous carbon deposit at the surface of the LiFe2P3O10 particles. Comparison between XPS results for LiFePO4 olivine and LiFe2P 3O10 revealed the change in the binding energy of Fe(II) ions. Studies of the local structure characterized by Raman scattering show the evolution of the chemical bonding with the increased number of interconnected PO4 oxo-anionic groups. The electrochemical characteristics of LiFe2P3O10 demonstrate their applicability in lithium batteries.

本文言語英語
ページ(範囲)1049-1054
ページ数6
ジャーナルJournal of Physical Chemistry C
111
2
DOI
出版ステータス出版済み - 1 18 2007
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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