Samsung Sdi Co., Inc.

Ulsan National Institute of Science and Technology

Hyejung Kim

Jaephil Cho

Jeongwon Oh

Kwanghwan Cho

Hyunjin Choi

A composite cathode active material, including a nickel-based lithium transition metal oxide secondary particle, the nickel-based lithium transition metal oxide secondary particle including a coating layer containing lithium and cobalt on a surface of a primary particle of the secondary particle.

Composite cathode active material, method of preparing the same, and cathode and lithium battery including the composite cathode active material

An electrode assembly and a lithium secondary battery comprising the same are disclosed. Specifically, the present invention provides an electrode assembly which is capable of preventing the occurrence of a short circuit between a non-coating portion of an electrode plate and an active material layer of an electrode plate having an opposite polarity when damage or shrinkage of a separator takes place, through the attachment of an insulating tape to either or both sides of the non-coating portion of an electrode plate without attachment of an electrode tab. Therefore, an internal short circuit of the battery can be prevented by application of the electrode assembly of the present invention to a variety of lithium secondary batteries including pouch-type, polygonal and cylindrical batteries.

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Ulsan, South Korea

Hyejung Kim