Electrochemical investigations on electrostatic spray deposited LiMn2O4 films

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

Research output: Contribution to journalArticle

45 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

Fingerprint

sprayers
Electrostatics
electrostatics
Quartz crystal microbalances
Electrochemical impedance spectroscopy
Cyclic voltammetry
quartz crystals
microbalances
X ray diffraction
impedance
Scanning electron microscopy
nonaqueous electrolytes
scanning electron microscopy
Electrochemical properties
Lithium
Electrolytes
lithium manganese oxide
Natural frequencies
diffraction
Dissolution

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

Cite this

Shu, Dong ; Chung, Kyung Yoon ; Cho, Won Il ; Kim, Kwang Bum. / Electrochemical investigations on electrostatic spray deposited LiMn2O4 films. In: Journal of Power Sources. 2003 ; Vol. 114, No. 2. pp. 253-263.
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Electrochemical investigations on electrostatic spray deposited LiMn2O4 films. / Shu, Dong; Chung, Kyung Yoon; Cho, Won Il; Kim, Kwang Bum.

In: Journal of Power Sources, Vol. 114, No. 2, 12.03.2003, p. 253-263.

Research output: Contribution to journalArticle

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AU - Shu, Dong

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AU - Cho, Won Il

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AB - 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.

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