Cathode active material for lithium battery and method for making the same
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United States of America Patent
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Apr 30, 2013
Grant Date -
Dec 1, 2011
app pub date -
Dec 16, 2010
filing date -
Jun 1, 2010
priority date (Note) -
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Abstract
The present disclosure relates to a cathode active material for lithium battery including a metal oxide represented by a formula of LiNi0.5Mn0.5-x-yCoxMgyO2, wherein 0.05≦x≦0.15 and 0.01≦y≦0.1. The present disclosure also relates to a method for making a cathode active material including steps of dissolving Ni, Mn, Co, and Mg sources to the liquid solvent at a molar ratio of Ni/Mn/Co/Mg=0.5/(0.5−x−y)/x/y, wherein 0.05≦x≦0.15, and 0.01≦y≦0.1 to achieve a liquid solution, adding a precipitant into the liquid solution, to achieve a coprecipitation, separating the coprecipitation from the liquid solution, and heating the coprecipitation mixed with a Li source at a temperature of about 600° C. to about 900° C.
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