Electrochemical Studies of Spinel LiMn2O4 Films Prepared by Electrostatic Spray Deposition

Matsuhiko Nishizawa, Takayuki Uchiyama, Kaoru Dokko, Kohta Yamada, Tomokazu Matsue, Isamu Uchida

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

An uniform, dense film of spinel LiMn2O4 (thickness, about 0.5 μm) was prepared by the electrostatic spray deposition method onto a Pt film electrode on Si substrate kept at 400 °C. Electrochemical properties of the LiMn2O4 film in a solution of 1 M LiClO4/propylene carbonate were studied by cyclic voltammetry and potential-step chronoamperometry. The oxidation and reduction of the film, which are accompanied by the extraction/insertion of lithium ions, proceeded almost quantitatively around 4 V vs. Li/Li+ with excellent coulombic reversibility. The apparent chemical diffusion coefficient of Li+ in Li1-xMn2O4 spinel phase varied on the order between 10-10 and 10-12 cm2 s-1 as a function of electrode potentials with minima at the potentials corresponding to the voltammetric current peaks.

Original languageEnglish
Pages (from-to)2011-2015
Number of pages5
JournalBulletin of the Chemical Society of Japan
Volume71
Issue number8
DOIs
Publication statusPublished - 1998 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)

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