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Coating of spinel LiNi0.5Mn1.5O4 cathodes with SnO2 by an electron cyclotron resonance metal–organic chemical vapor deposition method for high-voltage applications in lithium ion batteries
- Source :
- Journal of Electroanalytical Chemistry. 736:16-21
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Tin oxide coating by employing electron cyclotron resonance metal–organic chemical vapor deposition was performed on 5 V-class spinel LiNi0.5Mn1.5O4 cathode electrodes prepared by a conventional tape-casting method. The pristine and SnO2-deposited LiNi0.5Mn1.5O4 electrodes were characterized by X-ray diffraction, field-emission electron probe microanalyzer, field-emission scanning electron microscopy, Auger electron spectroscopy, charge–discharge measurements, and electrochemical impedance spectroscopy were evaluated in lithium cells using the fabricated electrodes. The SnO2-deposited LiNi0.5Mn1.5O4 electrodes exhibited better rate capability at room temperature and superior electrochemical performance during the storage test evaluated at 60 °C in a fully charged state than the pristine LiNi0.5Mn1.5O4 electrode. Also, surface modification of the LiNi0.5Mn1.5O4 electrode was found by impedance analyses to be effective for suppressing the increase of the charge transfer resistance during the storage test at elevated temperatures.
- Subjects :
- Auger electron spectroscopy
Scanning electron microscope
General Chemical Engineering
Analytical chemistry
chemistry.chemical_element
Electron microprobe
Lithium-ion battery
Electron cyclotron resonance
Cathode
Analytical Chemistry
Dielectric spectroscopy
law.invention
chemistry
law
Electrochemistry
Lithium
Subjects
Details
- ISSN :
- 15726657
- Volume :
- 736
- Database :
- OpenAIRE
- Journal :
- Journal of Electroanalytical Chemistry
- Accession number :
- edsair.doi...........2744541ce5ecee17b4e54ce044c51384