Effects of manganese and cobalt on the electrochemical and thermal properties of layered Li[Ni(0.52)Co(0.16+x)Mn(0.32-x)]O(2) cathode materials

Title
Effects of manganese and cobalt on the electrochemical and thermal properties of layered Li[Ni(0.52)Co(0.16+x)Mn(0.32-x)]O(2) cathode materials
Author
선양국
Keywords
Coprecipitation; Stability; Interfacial resistance; Cathode; Lithium battery
Issue Date
2011-08
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, Vol.196 No.16 [2011], 6710-6715
Abstract
We investigate the effects of the Co and Mn ratio on the structure, morphology, electrochemical properties, and thermal stability of Li[Ni0.52Co0.16+xMo0.32-x]O-2 cathode materials. Li[Ni0.52Co0.16+xMn0.32-x]O-2 (x=0, 0.08, 0.16) cathode materials are prepared via high temperature calcination of LiOH and coprecipitated [Ni0.52Co0.16+xMn0.32-x](OH)(2) hydroxides. From an X-ray diffraction investigation, the prepared materials have a well ordered O-3 type alpha-NaFeO2 layer structure (R (3) over barm). As the Co content (x) is increased, the initial discharge capacity increase slightly but it is accompanied by severe capacity fading during extensive cycling. Meanwhile, a small increase of Mn enhances the electrochemical stability at high temperature (55 degrees C) as well as the thermal stability. Electrochemical impedance spectroscopy reveals that manganese substitution is effective to reduce the resistance during cycling due to stabilization of the host structure. (C) 2010 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0378775310019518
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2010.11.045
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