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AlF3-coated LiCoO2 and Li[Ni1/3Co1/3Mn1/3]O-2 blend composite cathode for lithium ion batteries

Title
AlF3-coated LiCoO2 and Li[Ni1/3Co1/3Mn1/3]O-2 blend composite cathode for lithium ion batteries
Author
김동원
Keywords
AlF3 coating; Blend; Cathode; Battery; Lithium
Issue Date
2011-08
Publisher
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Citation
JOURNAL OF POWER SOURCES, 196, 16, p6974-p6977
Abstract
Surface modifications of electrode materials can improve the electrochemical and thermal properties of cathodes for use in lithium batteries. In this study, AlF3-coated LiCoO2 and AlF3-coated Li[Ni1/3Co1/3Mn1/3]O-2 cathode materials are blended, as both have the same crystal structure and exhibit similar electrochemical properties. The composite electrodes exhibit high discharge capacities of 180-188 mAhg(-1) in a voltage range of 3.0-4.5 V at room temperature. The capacity retention of the composite electrode is greater than 95% of the initial capacity after 50 cycles. The thermal stability of these composite electrodes is greatly improved because of the superior thermal stability of AlF3-coated Li[Ni1/3Co1/3Mn1/3]O-2. The blended AlF3-coated LiCoO2 and AlF3-coated Li[Ni1/3Co1/3Mn1/3]O-2 electrode shows two exothermic peaks, one at 227 degrees C from AlF3-coated LiCoO2 and another at 277 degrees C from AlF3-coated Li[Ni1/3Co1/3Mn1/3]O-2. accompanied by significantly reduced exothermic heat generation. (C) 2010 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0378775310019208?via%3Dihubhttp://hdl.handle.net/20.500.11754/37822
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2010.11.014
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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