Journal
JOURNAL OF POWER SOURCES
Volume 126, Issue 1-2, Pages 150-155Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2003.08.032
Keywords
Li-ion battery; lithium manganese oxide; spinel; aluminum oxide; metal oxide coating; surface treatment
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Al2O3-coated spinels were investigated with respect to their electrochemical characteristics. A Al2O3 coating on commercial LiMn2-x MxO4 (Nikki, Japan, M = Zr) was prepared by using the sol-gel method. AA analysis showed that manganese and lithium dissolution occur-red during the coating process. XRD patterns show that increase in the lattice parameter of Al2O3-coated spinels is related to formation of a solid solution on the surface of active materials. Impedance results revealed that Al2O3-coated spinel has electronic resistance. However, The cell performance was enhanced with the Al2O3 coating. Al2O3 is regarded as a coating material for stable cycling performance. (C) 2003 Elsevier B.V. All rights reserved.
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