Continuous Composition Spread and Electrochemical Studies of Low Cobalt Content Li(Ni,Mn,Co)O2 Cathode Materials

Title
Continuous Composition Spread and Electrochemical Studies of Low Cobalt Content Li(Ni,Mn,Co)O2 Cathode Materials
Authors
최지원임해나JongSeok JungNarendra Singh ParmarJae-Seung Lee
Keywords
continuous composition spread; Li(Ni; Mn; Co)O2 cathode; low cobalt content; thin film; X-ray near edge spectroscopy
Issue Date
2019-06
Publisher
Coatings
Citation
VOL 9-375
Abstract
Many scientific e orts have been undertaken toward reducing the Co content in LiMn1/3Ni1/3Co1/3O2 cathode materials for thin-film batteries. In this study, we present cathodes with a wide range of Li(Ni, Mn, Co)O2 compositions to determine the material with the best electrochemical performance by changing the ratio of Ni to Mn at a fixed 0.1 at.% of Co by the continuous composition spread sputtering method. The cathode composition measurements by Rutherford backscattering spectroscopy show that the best electrochemical performance is obtained for a composition of Ni:Mn:Co = 19:71:10. The reasons for this improved electrochemical performance are further investigated by X-ray di raction, electrochemical impedance spectroscopy, Fourier-transform infrared spectroscopy, and X-ray absorption near edge spectroscopy.
URI
http://pubs.kist.re.kr/handle/201004/69490
ISSN
2079-6412
Appears in Collections:
KIST Publication > Article
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