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

Research output: Contribution to journalArticlepeer-review

152 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)741-752
Number of pages12
JournalACS Nano
Volume4
Issue number2
DOIs
Publication statusPublished - 2010 Feb 23
Externally publishedYes

Keywords

  • Cathode
  • Domain boundary
  • Li-ion rechargeable battery
  • LiMnO
  • Nanosize effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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