Electrochemical investigations on electrostatic spray deposited LiMn2O4 films

Dong Shu, Kyung Yoon Chung, Won Il Cho, Kwang Bum Kim

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

LiMn2O4 films have been prepared using an electrostatic spray deposition (ESD) technique at 400 °C. The deposited films are investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical quartz crystal microbalance (EQCM), cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). Analysis of LiMn2O4 films using XRD and SEM indicates the formation of a LiMn2O4 single spinel phase with a uniform and dense film. On the other hand, electrochemical investigation in a non-aqueous electrolyte (1M LiClO4+EC+DEC) suggests the formation of surface film after the initial dissolution of Li2CO3 layer, the mass of surface film has been calculated from the resonant frequency curve and is about 1.2% of entire LiMn2O4 film. The results of CV, EQCM and EIS studies are discussed in terms of changes in surface electrochemical properties during the lithium insertion-extraction process.

Original languageEnglish
Pages (from-to)253-263
Number of pages11
JournalJournal of Power Sources
Volume114
Issue number2
DOIs
Publication statusPublished - 2003 Mar 12

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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