NMR study on Li[+] ionic motion in LixV2O5(0.4≦x≦1.4)

DOI Web Site Web Site 参考文献40件
  • Nishioka Daisuke
    Department of Quantum Materials Science, Institute of Technology, The University of Tokushima
  • Nakamura Koichi
    Department of Quantum Materials Science, Institute of Technology, The University of Tokushima
  • Michihiro Yoshitaka
    Department of Quantum Materials Science, Institute of Technology, The University of Tokushima
  • Ohno Takashi
    Department of Quantum Materials Science, Institute of Technology, The University of Tokushima
  • Vijayakumar Murugesan
    Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University
  • Selvasekarapandian Subramanian
    Solid State and Radiation Physics Laboratory, Department of Physics, Bharathiar University
  • Deguchi Hiroyuki
    Faculty of Engineering, Kyushu Institute of Technology

書誌事項

タイトル別名
  • NMR Study on Li<SUP>+</SUP> Ionic Motion in Li<I><SUB>x</SUB></I>V<SUB>2</SUB>O<SUB>5</SUB> (0.4≤<I>x</I>≤1.4)
  • NMR study on Li ionic motion in LixV2O5 0 4 x 1 4
  • NMR Study on Li<sup>+</sup> Ionic Motion in Li<sub><i>x</i></sub>V<sub>2</sub>O<sub>5</sub> (0.4 ≦<i>x</i>≦1.4)

この論文をさがす

説明

The temperature dependences of the 7Li NMR line width Δν and spin–lattice relaxation rate 1⁄T1 have been measured in lithium vanadium bronze LixV2O5 with 0.4≤x≤1.4 over the temperature range of 77–550 K. The narrowing of Δν has been observed for each sample, which is interpreted in terms of the motional narrowing due to the Li+ ionic diffusion. In Li0.8V2O5 with a single δ-phase, an activation energy Em for the hopping of Li+ ions is estimated to be 0.16±0.05 eV, whereas in Li0.4V2O5 the value of 0.10±0.05 eV is deduced for the β-phase. The ionic conductivity σ evaluated from the diffusion coefficient D in Li0.8V2O5 at 400 K is 6.3×10−7 Ω−1 cm−1, which is consistent with the reported value of σdc\\simeq10−7 Ω−1 cm−1. Below 300 K, 1⁄T1 is considered to be due to magnetic interaction of 7Li nuclear spins with V4+ electronic spins. Above 350 K, 1⁄T1 is dominated by Li+ ionic diffusion, from which Em is estimated to be 0.10±0.05 eV.

収録刊行物

参考文献 (40)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ