PRECURSOR FOR PREPARING LITHIUM COMPOSITE TRANSITION METAL OXIDE, METHOD FOR PREPARING SAME, AND LITHIUM COMPOSITE TRANSITION METAL OXIDE

摘要

Disclosed are a transition metal precursor for preparing a lithium composite transition metal oxide, a method for preparing the precursor, and a lithium composite transition metal oxide. The transition metal precursor includes a composite transition metal compound having a composition represented by Formula (1) and a Mn content of 60 to 85 mol%:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒNi a M b Mn 1-(a+b) (OH 1-x ) 2 €ƒ€ƒ€ƒ€ƒ€ƒ(1)
where M is at least one selected from the group consisting of Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and period II transition metals, 0.15 ‰¤ a ‰¤ 0.3, 0 ‰¤ b ‰¤ 0.1 and 0€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLi 1+z [Ni a M b Mn 1-(a+b) ] 2 O 4-y A y €ƒ€ƒ€ƒ€ƒ€ƒ(2)
where M is at least one selected from the group consisting of Ti, Co, Al, Cu, Fe, Mg, B, Cr and period II transition metals, A is a monoanion or dianion, 0.15 ‰¤ a ‰¤ 0.3, 0.005 ‰¤ b ‰¤ 0.1, -0.1 ‰¤ z ‰¤ 0.1 and 0 ‰¤ y ‰¤ 0.1.