Electrode active material, method for producing same, electrode for nonaqueous secondary battery, and nonaqueous secondary battery
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United States of America Patent
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Mar 6, 2018
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app pub date -
Mar 10, 2010
filing date -
Apr 10, 2009
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Abstract
An electrode active material includes particles of a lithium-containing composite oxide represented by the general compositional formula: Li1+xMO2, where −0.15≦x≦0.15, and M represents an element group of three or more elements including at least Ni, Co and Mn, wherein the ratios of Ni, Co and Mn to the total elements constituting M satisfy 45≦a≦90, 5≦b≦30, 5≦c≦30 and 10≦b+c≦55, where the ratios of Ni, Co and Mn are represented by a, b and c, respectively, in units of mol %, the average valence A of Ni in the whole particles is 2.2 to 3.2, the valence B of Ni on the surface of the particles has the relationship: B
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