Improved Co-substituted, LiNi0.5-xCo2xMn1.5-xO4 lithium ion battery cathode materials

Title
Improved Co-substituted, LiNi0.5-xCo2xMn1.5-xO4 lithium ion battery cathode materials
Author
선양국
Keywords
Rate capability; 5 V spinel; Cathode; Co substitution; Lithium batteries
Issue Date
2012-08
Publisher
Elsevier Science B.V., Amsterdam
Citation
JOURNAL OF POWER SOURCES,Vol220,p354-359
Abstract
The synthesis and the structural and morphological characterization of micro-sized, spherical LiNi0.5-xCo2xMn1.5-xO4 powders are reported. The results demonstrate that these materials have a high electronic conductivity as well as a high tap density. We show that when tested in a lithium cell the Co-substituted LiNi0.5-xCO2xMn1.5-xO4 electrodes exhibited a better cycling performance and a better rate capability than the Co-free LiNi0.5Mn1.5O4 parent cells. The enhanced electrochemical performances are attributed to the increase in electrical conductivity and in structural stability caused by Co substitution for Ni and Mn and the mixed valence effect of Mn3+/Mn4+. Due to these properties, the LiNi0.5-xCo2xMn1.5-xO4 electrodes are believed to be of importance for the progress of the lithium battery technology. (C) 2012 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0378775312012396?via%3Dihubhttp://hdl.handle.net/20.500.11754/41151
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2012.07.104
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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