Effect of titanium addition as nickel oxide formation inhibitor in nickel-rich cathode material for lithium-ion batteries

Title
Effect of titanium addition as nickel oxide formation inhibitor in nickel-rich cathode material for lithium-ion batteries
Author
선양국
Keywords
Lithium-ion battery; LiNi0.8Co0.15Al0.05O2; Surface modification; Cation mixing
Issue Date
2015-12
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v. 299, Page. 425-433
Abstract
Among high capacity cathodes, LiNi0.8Co0.15Al0.05O2 has a high capacity and stable electrochemical performance, although it suffers from degradation upon cycling and aging as a result of the formation of inactive NiO on the surface edges. In this study, the role of Ti, which partially replaces Ni in the transition metal layer that is in particular intended to surface region not in bulk of LiNi0.8Co0.15Al0.05O2, is investigated on the electrochemical performance and interfacial phenomena using transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy, electron energy loss spectroscopy, and X-ray diffraction analyses before and after electrochemical cycling. As a result, formation of NiO inactive phase is inhibited for the Ti-doped LiNi0.8Co0.015Al0.05O2, so that the electrode could deliver higher capacity upon cycling test. Further electrochemical impedance analysis is performed to understand the interfacial behavior of Ti-doped LiNi0.8Co0.15Al0.05O2 (LiNi0.80Co0.15Al0.02Ti0.03O2). (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0378775315302810?via%3Dihubhttp://hdl.handle.net/20.500.11754/29494
ISSN
0378-7753; 1873-2755
DOI
10.1016/j.jpowsour.2015.09.016
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE