Electrochemical studies of Li-Ion extraction and insertion of LiMn2O4 single crystal

Kaoru Dokko, Matsuhiko Nishizawa, Mohamed Mohamedi, Minoru Umeda, Isamu Uchida, Junji Akimoto, Yasuhiko Takahashi, Yoshito Gotoh, Susumu Mizuta

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

A single crystal of LiMn2O4 (∼35 × 20 × 12 μm) was prepared by a flux method. The electrochemical properties of this material were investigated in a 1 M LiClO4/propylene carbonate + ethylene carbonate solution using a microelectrode technique. A Pt microfilament was brought into contact with the single crystal, and cyclic voltammetry and potential step chronoamperometry measurements were successfully performed on this electrode. The single crystal of LiMn2O4 exhibited reversible behavior during the Li-ion extraction/insertion. A new peak was observed at 3.86 V vs. Li/Li+ which was not clearly reported so far on polycrystalline of LiMn2O4. The chemical diffusion coefficient of Li-ion into the LiMn2O4 crystal was estimated to be 10-11 cm2/s.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume4
Issue number9
DOIs
Publication statusPublished - 2001 Sep 1

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)

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