Positive active material, positive electrode including the same, and lithium secondary battery including the positive electrode
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United States of America Patent
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Oct 31, 2017
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May 8, 2015
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Nov 28, 2014
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Abstract
Provided are a positive active material, a positive electrode including the same, and a lithium secondary battery including the positive electrode. The positive active material includes lithium cobalt oxide containing a metal element, and the lithium cobalt oxide containing a metal element has a ratio of a peak intensity of the O3 phase to a peak intensity of the H1-3 phase, IO3/IH1-3, that is greater than 1 in a X-ray diffraction (XRD) analysis spectrum using Cu-Kα radiation. Accordingly, a lithium secondary battery including the positive active material may have improved lifespan characteristics even at a high voltage.
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