Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Yongnam Ham

Jin-hwan Park

Gue-sung Kim

Jaegu Yoon

Dongwook Han

Youhwan Son

Dongwook Shin

Weonkyu Koh

Sungjun Park

A substituted nanocrystal including a nanocrystal represented by Formula 1, wherein a portion of halogen atoms in an outermost region of the nanocrystal is substituted with a chloride anion, a polyatomic anion, or a combination thereof:AMX&#x2003;&#x2003;Formula 1

Nanocrystal, method of preparing the same, and optoelectronic device including the nanocrystal

A cathode active material including a layered lithium transition metal oxide, wherein the layered lithium transition metal oxide includes a metal cation having an oxidation number of +4, and wherein the metal cation is disposed in an octahedral site of a lattice of the layered lithium transition metal oxide.

Cathode active material, cathode and lithium secondary battery including the same, and method of preparing cathode active material

An anode active material comprises metal core particles, metal nano wires formed on the metal core particles, pores between the metal core particles and the metal nano wires, and a carbon-based coating layer formed on a surface of the metal core particles and metal nano wires. In the anode active material according to the present invention, the metal core particles and metal nano wires are combined to form a single body, and a carbon-based coating layer is formed on the surface of the metal nano wires and metal core particles. Thus, volume changes in the pulverized metal core particles can be effectively buffered during charging and discharging, and the metal core particles are electrically connected through the metal nano wires. As a result, volume changes in the anode active material and degradation of the electrode can be prevented, thereby providing excellent initial charge/discharge efficiency and enhanced charge/discharge capacity.

Anode active material, method of preparing the same, and anode and lithium battery containing the material

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Osan-si, South Korea

Yongnam Ham