Cathode active material precursor particle, method for producing thereof and method for producing cathode active material for lithium secondary battery
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United States of America Patent
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Aug 25, 2015
Grant Date -
Mar 21, 2013
app pub date -
Sep 13, 2012
filing date -
Sep 16, 2011
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Abstract
A cathode active material precursor particle, a method for producing thereof and a method for producing cathode active material for a lithium secondary battery. The cathode active material precursor particle is capable of forming a cathode active material for a lithium secondary battery including a lithium composite oxide having a layered rock salt structure through lithium incorporation. The particles are characterized by the cathode active material precursor particle being formed into a substantially spherical shape and includes therein a large number of voids in a substantially uniform manner; and the cathode active material precursor particle has: an average particle diameter D50 of 0.5 to 5 μm; a specific surface area of 3 to 25 m2/g; and a relative tap density, which is a value obtained by dividing a tap density by a theoretical density of a material constituting the cathode active material precursor particle, of 0.25 to 0.4.
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