Fast Li-ion insertion into nanosized LiMn2O4 without domain boundaries

Masashi Okubo, Yoshifumi Mizuno, Hirotoshi Yamada, Jedeok Kim, Eiji Hosono, Haoshen Zhou, Tetsuichi Kudo, Itaru Honma*

*この研究の対応する著者

研究成果: Article査読

166 被引用数 (Scopus)

抄録

The effect of crystallite size on Li-ion insertion in electrode materials is of great interest recently because of the need for nanoelectrodes in higher-power Li-ion rechargeable batteries. We present a systematic study of the effect of size on the electrochemical properties of LiMn2O 4. Accurate size control of nanocrystalline LiMn2O 4, which is realized by a hydrothermal method, significantly alters the phase diagram as well as Li-ion insertion voltage. Nanocrystalline LiMn 2O4 with extremely small crystallite size of 15 nm cannot accommodate domain boundaries between Li-rich and Li-poor phases due to interface energy, and therefore lithiation proceeds via solid solution state without domain boundaries, enabling fast Li-ion insertion during the entire discharge process.

本文言語English
ページ(範囲)741-752
ページ数12
ジャーナルACS Nano
4
2
DOI
出版ステータスPublished - 2010 2 23
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 工学(全般)
  • 物理学および天文学(全般)

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