Patent ID: 8481213
Filing Date: 2013-07-09
Classification: C01G,C01P,H01M,Y02E

Abstract:
1. A cathode active material for a lithium secondary cell, comprising a lithium transition metal oxide with a layered crystalline structure in which the transition metal comprises a transition metal mixture of Ni, Mn and Co, an average oxidation number of all transition metals other than lithium is more than +3, and specific conditions represented by the following Formulae (1), (2) and (3) are satisfied: wherein the nickel portion of the mixture comprises nickel (a) in an excess content relative to a content of manganese, as well as nickel (b) with a content corresponding to the content of manganese, and wherein m(Ni)/m(Mn) is a molar ratio of nickel to manganese, m(Ni