In situ conductivity measurements of LiMn2O4thin films during lithium insertion/extraction by using interdigitated microarray electrodes

Satoru Yaniamura, Hiromichi Koshika, Matsuhiko Nishizawa, Tomokazu Matsue, Isamu Uchida

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Thin films of LiMn2O4 have been prepared by RF magnetron sputtering on interdigitated microarray electrodes. In situ conductivity-potential profiles and cyclic voltammograms during extraction/insertion processes of Li ions were obtained simultaneously in nonaqueous and aqueous electrolyte solutions (1 M LiClO4/ propylene carbonate and 1 M LiCl/water). The electronic conductivity of Li1-xMn2O4 was found not to show metallic transition and maintain its semiconducting state during the extraction/insertion of Li ion. A slight decrease in conductivity was observed with increasing the anodic potential, i.e., with increasing x (lithium extraction) and recovered reversibly when the potential returned to the cathodic side (re-insertion of Li ions). Similar results were obtained in both aqueous and nonaqueous electrolyte solutions.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalJournal of Solid State Electrochemistry
Volume2
Issue number4
DOIs
Publication statusPublished - 1998 Jan 1

Keywords

  • In situ conductivity measurements
  • Interdigitated microarray electrodes
  • Li ion battery
  • Semiconductor electrode
  • Spinel-type LiMnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering

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