Samsung Sdi Co., Inc.

Young Jin Park

Chang Wook Kim

Eun Sung Lee

Sang Hyun Kim

Dongjin Kim

Dohyung Park

Minhan Kim

Sung Soo Park

ILseok Kim

Sangin Park

Won Chull Han

Shin Gun Kang

Sooyoun Park

KyoungHyun Kim

Changwook Kim

Eunsung Lee

Jeong Chull Ahn

Soo Youn Park

Yu Jin Han

The present invention relates to a secondary battery which includes a sheathing made of a material having an increased thermal conductivity and can thus have an improved safety. As an example, disclosed is a secondary battery comprising: an electrode assembly; and a sheath material which receives the electrode assembly and comprises a metal layer and a non-metal layer formed on the surface of the metal layer, wherein the thickness of the metal layer occupies 50% to 70% of the total thickness of the sheath material.

Secondary battery

The invention relates to a lithium secondary battery including a positive electrode, a negative electrode including a negative active material, and an electrolyte, wherein the positive electrode includes a first positive active material of a lithium manganese cobalt oxide in Chemical Formula 1, and a second positive active material of a lithium transition metal oxide that occludes and releases lithium ions; an average particle diameter (D50) of the first positive active material is smaller than an average particle diameter (D50) of the second positive active material; and the first positive active material has lower first charge/discharge efficiency than that of the negative active material and has an irreversible capacity during the first charge/discharge that is larger than an irreversible capacity during the first charge/discharge of the negative active material.

Lithium secondary battery

A lithium cobalt composite oxide for a lithium secondary battery and a lithium secondary battery, the lithium cobalt composite oxide being doped with magnesium and having an atomic ratio of Mg/Co of about 0.0035:1 to about 0.01:1.

Lithium cobalt composite oxide for lithium secondary battery and lithium secondary battery including positive electrode including the lithium cobalt composite oxide

A lithium cobalt composite oxide for a lithium secondary battery and a lithium secondary battery, the lithium cobalt composite oxide including a magnesium (Mg)-doped lithium cobalt composite oxide having an atomic ratio of Mg to cobalt (Co) of about 0.0035:1 to about 0.01:1, wherein the Mg-doped lithium cobalt composite oxide further includes fluorine (F).

Lithium cobalt composite oxide for lithium secondary battery and lithium secondary battery including positive electrode including the same

A positive active material for a rechargeable lithium battery includes a lithium nickel-based metal oxide represented by LiNiMOand a lithium-containing oxide on a surface of the lithium nickel-based metal oxide. In the formula LiNiMO, M is one or more of Co, Mn, Al, Mg, Ti, Zr, or a combination thereof, 0&#x3c;x&#x3c;1.1, and 0&#x2264;y&#x3c;0.5.

Positive active material including lithium nickel-based metal oxide, method of preparing the same, and rechargeable lithium battery including the same

Growing community of inventors

Yongin-si, South Korea

Young Jin Park