Experimental visualization of lithium diffusion in LixFePO 4

Shin Ichi Nishimura, Genki Kobayashi, Kenji Ohoyama, Ryoji Kanno, Masatomo Yashima, Atsuo Yamada

Research output: Contribution to journalArticle

532 Citations (Scopus)

Abstract

Chemical energy storage using batteries will become increasingly important for future environmentally friendly (green) societies. The lithium-ion battery is the most advanced energy storage system, but its application has been limited to portable electronics devices owing to cost and safety issues. State-of-the-art LiFePO"4 technology as a new cathode material with surprisingly high charge-discharge rate capability has opened the door for large-scale application of lithium-ion batteries such as in plug-in hybrid vehicles. The scientific community has raised the important question of why a facile redox reaction is possible in the insulating material. Geometric information on lithium diffusion is essential to understand the facile electrode reaction of Li(x)FePO"4 (0<x<1), but previous approaches have been limited to computational predictions. Here, we provide long-awaited experimental evidence for a curved one-dimensional chain for lithium motion. By combining high-temperature powder neutron diffraction and the maximum entropy method, lithium distribution along the [010] direction was clearly visualized.

Original languageEnglish
Pages (from-to)707-711
Number of pages5
JournalNature Materials
Volume7
Issue number9
DOIs
Publication statusPublished - 2008 Sep

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Nishimura, S. I., Kobayashi, G., Ohoyama, K., Kanno, R., Yashima, M., & Yamada, A. (2008). Experimental visualization of lithium diffusion in LixFePO 4. Nature Materials, 7(9), 707-711. https://doi.org/10.1038/nmat2251