Patent ID: 8465872
Filing Date: 2013-06-18
Classification: C01G,C01P,H01M,Y02E

Abstract:
1. A positive electrode active material sintered body for a battery satisfying the following requirements (I) to (VII): (I) fine particles in a positive electrode active material and carbon particles are sintered to constitute the sintered body; (II) a peak pore diameter which provides a maximum differential pore volume value in a pore diameter range of 0.01 to 10 μm in a pore distribution measured by a mercury porosimeter is 0.3 to 5 μm; (III) a total pore volume measured by the mercury porosimeter is 0.1 to 1 cc/g; (IV) an average particle diameter in laser diffraction/scattering particle diameter distribution measurement is not less than the peak pore diameter and not more than 5 μm; (V) a peak, which provides a differential pore volume value of 10% or more of the maximum differential pore volume value and has a smaller pore diameter than the peak pore diameter in the pore distribution measured by the mercury porosimeter, is not present; (VI) a BET specific surface area is 2 to 6 m (VII) a full width at half maximum of a strongest X-ray diffraction peak of the positive electrode active material sintered body is 0.13 to 0.2.