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公开(公告)号：EP3846262A1
公开(公告)日：2021-07-07
申请号：EP19854420.7
申请日：2019-07-08
发明人： HANAMURA, Naoya , TANAKA, Satoshi , HATA, Mikio
摘要： The present invention provides a positive electrode active material particle for a secondary battery, having excellent electrical conductivity as the whole positive electrode active material particle for a secondary battery, by which fluctuation of volume resistivity depending on the size of the particle diameter of the positive electrode active material particle for a secondary battery is suppressed, and which forms a particle size distribution width having a predetermined spread, and a method for producing the positive electrode active material particle for a secondary battery. The positive electrode active material particle for a secondary battery is a positive electrode active material particle for a secondary battery, containing a metal and/or a metal compound; and a nickel-containing composite compound, wherein
a value of X represented by the following equation (I) is 0.00 or more and 0.08 or less. X = C − A / B wherein A means a molar ratio of an amount of the metal in the metal and/or the metal compound to an amount of metals in the nickel-containing composite compound at a secondary particle diameter where a cumulative volume percentage is 90% by volume (D90) among the positive electrode active material particles for a secondary battery, B means a molar ratio of an amount of the metal in the metal and/or the metal compound to an amount of the metals in the nickel-containing composite compound at a secondary particle diameter where the cumulative volume percentage is 50% by volume (D50) among the positive electrode active material particles for a secondary battery, and C means a molar ratio of an amount of the metal in the metal and/or the metal compound to an amount of the metals in the nickel-containing composite compound at a secondary particle diameter where the cumulative volume percentage is 10% by volume (D10) among the positive electrode active material particles for a secondary battery.
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