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

Title
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
Authors
김동원
Keywords
Surface modification; Lithium nickel manganese oxide; Lithium ion battery; Tin oxide; Chemical vapor deposition
Issue Date
2015-01
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 736, Page. 16-21
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 degrees 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. (C) 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11754/21353http://www.sciencedirect.com/science/article/pii/S1572665714004688
ISSN
1572-6657
DOI
http://dx.doi.org/10.1016/j.jelechem.2014.10.022
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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