Samsung Electronics Co., Ltd.

Samsung Sdi Co., Inc.

Yoon-sok Kang

Jin-hwan Park

Jun-young Mun

Jae-gu Yoon

Min-sik Park

Gue-sung Kim

Myung-hoon Kim

Byung-jin Choi

Jae-myung Lee

Jun-ho Park

Mi-jeong Song

Seok-soo Lee

Young-Gyoon Ryu

Han-su Kim

Jong-seob Kim

Seung-sik Hwang

Jun-Ho Park

Dong-joon Lee

Dong-Joon Lee

Joung-won Park

Won-chang Choi

Jong-min Wang

Tae-ho Yoon

Sung-jin Ahn

Jee-hwan Jang

Seung-mo Oh

Byung-soon Chen

A composite cathode active material, a method of preparing the composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode. The composite cathode active material includes a lithium intercalatable material; and a garnet oxide, wherein an amount of the garnet oxide is about 1.9 wt % or less, based on a total weight of the composite cathode active material.

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

An electrolyte for a lithium secondary battery, the electrolyte including: a lithium salt; a non-aqueous organic solvent; and a piperazine derivative represented by Formula 1 having an oxidation potential lower than an oxidation potential of the non-aqueous organic solvent by about 2 V to about 4 V: wherein, in Formula 1, X, Y, and Rto Rare defined in the specification.

Electrolyte for lithium secondary battery and lithium secondary battery using the same

A surface-treated electrode active material, a method of surface treating an electrode active material, an electrode, and a lithium secondary battery. The surface-treated electrode active material includes a surface metal oxide layer having higher degree of reduction of a metal than that of a bulk metal oxide layer. The method includes: forming a mixture by adding an untreated electrode active material comprising a metal oxide, and at least one of a basic material and a reducing material to a solvent; and stirring the mixture.

Surface-treated electrode active material, method of surface treating electrode active material, electrode, and lithium secondary battery

An electrolyte for a lithium secondary battery, the electrolyte including a lithium salt, a non-aqueous organic solvent, and a polar additive based on a substituted hetero-bicyclic compound. Oxidation of the electrolyte is prevented by formation of a polar thin film on a surface portion of the positive electrode, which facilitates transfer of lithium ions. The lithium secondary batteries using the electrolyte have excellent high temperature life characteristics and high temperature conservation characteristics.

Electrolyte for lithium secondary battery and lithium secondary battery including the same

A composite cathode active material including a lithium metal oxide including an oxide Formula 1 and sulfur,LiMnO.(1)LiMOLiMnO&#x2003;&#x2003;(1)wherein 0&#x3c;x&#x3c;0.6, 0&#x3c;y&#x3c;0.1, and M is at least one selected from a metal and a metalloid.

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

An electrolyte for a lithium secondary battery, the electrolyte including a lithium salt, a non-aqueous organic solvent, and an additive represented by Formula 1 below: 

An electrolyte for a lithium secondary battery, which includes a lithium salt, a nonaqueous organic solvent and at least one additive selected from the group consisting of vitamin G (vitamin B, riboflavin), vitamin B(niacinamide), vitamin B(adenine), vitamin B(pantothenic acid), vitamin H (vitamin B, biotin), vitamin M (vitamin B, folic acid), vitamin B(4-aminobenzoic acid), vitamin D(ergocalciferol), vitamin D(cholecalciferol), vitamin K(phylloquinone), ascorbyl palmitate, and sodium ascorbate.

An electrolyte for a lithium secondary battery, the electrolyte comprising: a lithium salt, a non-aqueous organic solvent, and an additive represented by Formula 1 below: 

An anode includes a collector; and an anode active material layer disposed on the collector comprises an anode active material, which is lithium oxide coated LiTiO, a conductive material, and a binder, wherein the lithium oxide intercalates and/or deintercalates lithium ions into and from the lattice structure of LiTiO. By coating the surface of the anode active material with lithium oxide, an anode including the surface-treated anode active material has a high capacity, high-rate properties, and a high initial efficiency.

Surface treated anode active material and method of making the same, anode including the same, and lithium battery including the same

An organic electrolytic solution includes a lithium salt; an organic solvent containing a high dielectric constant solvent; and a polymerizable cycloolefin monomer, and an lithium battery employing the same. The organic electrolytic solution prevents decomposition of an electrolyte, and thus the lithium battery employing the organic electrolytic solution has improved cycle characteristics and lifetime.

Organic electrolytic solution comprising cycloolefin monomer and lithium battery employing the same

An electrolyte for a lithium secondary battery including a lithium salt, a nonaqueous organic solvent, and an additive, in which the additive is composed of one or more compounds including a purinone or a purinone derivative. The lithium secondary battery with improved life and high-temperature storage may be provided by using the electrolyte for a lithium secondary battery according to an embodiment of the present invention.

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Seongnam-si, South Korea

Yoon-sok Kang