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Electronic properties of LiMn2−x Ti x O4

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Abstract

Ti-substituted LiMn2O4 (LiMn2−x Ti x O4, x=0, 0.15, 0.30, 0.45, 0.60, and 0.75) has been synthesized using solid-state reactions. Their crystal and electronic structures were investigated using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet photoelectron spectroscopy (UPS). XRD data suggested that the lattice parameters of LiMn2−x Ti x O4 increase due to the replacement of Mn by Ti ions. XPS results indicated that the substituted Ti ions were in +4 oxidation state; consequently, the normal oxidation state of Mn ions has been detected by measuring the binding energy splitting of Mn 3s states, which decreases with the content of substituted Ti. The valence band spectra suggested that the intensity of e g level of Mn 3d orbitals increased due to the increase of the Mn3+/Mn4+ ratio.

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Authors and Affiliations

  1. Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen, 361005, China

    Jie Song, Bing-Lin Hong, Jun Zheng, Pei Lin, Ming-Sen Zheng, Quan-Feng Dong & Shi-Gang Sun

  2. State Key Lab of Phys. Chem. of Solid Surf., Xiamen University, Xiamen, 361005, China

    Jie Song, Bing-Lin Hong, Jun Zheng, Pei Lin, Ming-Sen Zheng, Quan-Feng Dong & Shi-Gang Sun

  3. Department of Physics, La Trobe University, Bundoora, 3086, VIC, Australia

    Qi-Hui Wu

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  1. Jie Song
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Correspondence to Qi-Hui Wu.

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Song, J., Hong, BL., Zheng, J. et al. Electronic properties of LiMn2−x Ti x O4 . Appl. Phys. A 98, 455–460 (2010). https://doi.org/10.1007/s00339-009-5420-y

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