Cathode materials and lithium secondary battery containing the same
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United States of America Patent
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Mar 31, 2015
Grant Date -
Jun 23, 2011
app pub date -
Aug 6, 2010
filing date -
Jan 6, 2009
priority date (Note) -
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Abstract
Provided is a cathode active material composed of lithium nickel oxide represented by Formula 1, wherein the lithium nickel oxide contains nickel in an amount of 40% or higher, based on the total weight of transition metals, and the cathode active material comprises a first coating layer provided on the surface thereof and a second coating layer provided on the surface of the first coating layer, wherein the first coating layer is composed of a non-reactive material selected from the group consisting of oxides, nitrides, sulfides and mixtures or complexes thereof and the second coating layer is composed of a carbon-based material.
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