Korea Electronics Technology Institute

Yeonggwang Park

Youngjun Kim

Junho Song

Kyungjun Lee

Woosuk Cho

Sanggil Woo

Jeomsoo Kim

Taeeun Yim

The present invention relates to a non-aqueous cathode material for lithium secondary batteries using a spherical transition metal complex carbonate, and a method for preparing same. According to the present invention, since the surface of a spherical transition metal complex carbonate, which is prepared by using a cobalt material, nickel material, manganese material, carboxyl group material, and ammonia material, is coated with titanium dioxide. In addition, by mixing the prepared, surface-coated transition metal complex carbonate with a lithium material and heat-treating the resultant material, it is possible to prepare a spherical Li-rich cathode material having a primary particle size of 200 nm or more, and a 0.1 C capacity of 250 mAh/g or more, and capable of implementing 96% or more of the initial capacity in a full cell after charging and discharging 60 times.

Non-aqueous, high capacity cathode material for lithium secondary battery, and method for preparing same

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Incheon, South Korea

Yeonggwang Park