Samsung Sdi Co., Inc.

Samsung Display Devices Co., Ltd.

Kyou-Yoon Sheem

Sang-Jin Kim

Sang-Young Yoon

Joon-Sup Kim

Keiko Matsubara

Toshiaki Tsuno

Sung-soo Kim

Sang-Min Lee

Akira Takamuku

Sung-Soo Kim

Wan-Uk Choi

Han-Su Kim

Yoshiaki Nitta

Wan-uk Choi

Jae-yul Ryu

Jae-Yul Ryu

Young-Hee Lee

Yong-Mook Kang

Min-Seok Sung

Sang-min Lee

Goo-Jin Jeong

Bok-Hwan Jung

Jeong-Ju Cho

Seong-Mo Oh

A negative electrode for a lithium secondary battery of the present invention includes a negative active material including a plate-shaped carbon powder particle agglomerated in a primary structure in which the plate-shaped particle is oriented in a plane direction and laminated. Fine carbon powder particles are then agglomerated to form a secondary structure on the surface of the primary structure such that the resulting particles include fine pores formed on the surface.

Negative active material for lithium secondary battery and negative electrode and lithium secondary battery comprising same

The present invention relates to an active material for a rechargeable lithium battery and a rechargeable lithium battery including the same. The active material includes an active material and a fiber-shaped or tube-shaped carbon conductive material attached to the surface of the active material. The active material includes a conductive shell including a fiber-shaped or tube-shaped carbon conductive material and increases discharge capacity due to improved conductivity and improves cycle-life efficiency by maintaining paths between active material particles during charge and discharge cycles.

Active material for rechargeable lithium battery and rechargeable lithium battery including same

Disclosed is a negative active material for a rechargeable lithium battery including ultra-fine particles comprising an element which is capable of alloying with lithium. The particles have a diameter of 1 nm to 200 nm, a Raman shift of 480 cmto 520 cmmeasured by Raman Spectroscopy, and a full width at half-maximum of 10 cmto 30 cm.

Negative active material for rechargeable lithium battery and rechargeable lithium battery

A negative active material of a non-aqueous electrolyte battery includes a compound represented by formula 1:LiMVO&#x2003;&#x2003;(1)where 0.1&#x2266;x&#x2266;2.5, 0&#x3c;y&#x2266;0.5, 0.5&#x2266;z&#x2266;1.5, 0&#x2266;d&#x2266;0.5, and M is at least one element selected from the group consisting of Al, Cr, Mo, Ti, W, and Zr.

Negative active material for a non-aqueous electrolyte battery, and a non-aqueous electrolyte battery comprising the same

A negative active material of a rechargeable lithium battery includes a crystalline carbon core having an intensity ratio Ra I(1360)/I(1580) of a Raman Spectroscopy peak intensity I(1360) at a (1360) plane to an Raman Spectroscopy peak intensity I(1580) at a (1580) plane of 0.01 to 0.45 and a shell with a turbostratic or half-onion ring structure coated on the core, the shell including crystalline micro-particles and a semi-crystalline carbon, the shell having an intensity ratio Ra I(1360)/I(1580) of a Raman Spectroscopy peak intensity I(1360) at a (1360) plane to a Raman Spectroscopy peak intensity I(1580) at a (1580) plane of 0.46 to 1.5.

Negative active material for rechargeable lithium battery and method of preparing same

A negative active material for a rechargeable lithium battery, a method for making the negative active material, and a rechargeable lithium battery including a carbonaceous material, which is capable of reversibly intercalating and deintercalating lithium, and particles of a metal or a metal compound or mixtures thereof, distributed in the carbonaceous material, the metal or the metal compound being capable of forming an alloy with lithium during electrochemical charging and discharging.

Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery comprising same

Disclosed is a negative electrode for a lithium secondary battery which is prepared by mixing graphite powder with a binder. The negative electrode comprises graphite with an intensity ratio I(110)/I(002) of 0.5 or more wherein I(002) is an X-ray diffraction peak intensity I(002) at a (002) plane and I(110) is an X-ray diffraction peak intensity I(110) at a (110) plane The negative electrode for a lithium secondary battery has enhanced discharge capacity and cycle life characteristics.

Graphite-containing composition, negative electrode for a lithium secondary battery, and lithium secondary battery

A negative active material for a rechargeable lithium battery is provided. The negative active material includes a core and a carbon shell formed around the core. The core includes a crystalline carbon, an amorphous carbon or a mixture thereof, and the carbon shell includes an amorphous carbon with a metal selected from a transition metal, a semi-metal, an alkali metal or an alkali earth metal.

Disclosed is carbonaceous active material for a lithium-ion secondary battery. Conducting a differential thermal analysis on the carbonaceous active material results in the displaying of at least two exothermic peaks overlapping to form shoulders.

Carbonaceous active material for lithium secondary battery

Disclosed are an electrode material, a method for its preparation, an electrode comprising the electrode material and a battery comprising the same. The electrode material comprises a binder comprising a water-soluble conductive polymer and a water-soluble polymer, and an active material.

Electrode material, method for preparing same, electrode, and battery comprising same

An electrode for a rechargeable lithium battery includes a current collector and an active material layer formed on the current collector. The active material layer includes an active material, a binder and a water-soluble polymer. The binder is a copolymer of (metha)acrylic acid and (metha)acrylic alkylester, and an amorphous polypropylene homopolymer or an amorphous copolymer of propylene and a Cto Colefin.

Electrode for rechargeable lithium battery, method of preparing same and rechargeable lithium battery having the same

Disclosed is a carbonaceous material comprising a graphite particle having a 002 plane interval d002 of less than 0.337 nm as measured by the X-ray wide angle diffraction method; a complex particle disposed and distributed in the vicinity of the surface of the graphite particle, the complex particle comprising silicon and carbon and having a particle size smaller than that of the graphite particle; and an amorphous carbon layer with a plane interval d002 of more than 0.37 nm, the amorphous carbon layer being a polymer layer and being coated on the graphite particle and the complex particle, wherein the complex particle comprises a Si particulate, a conductive carbon material disposed and distributed in the vicinity of the surface of the Si particulate, and a rigid carbon material layer coated on the Si particulate and the conductive carbon material, the Si particulate being composed of a crystalline Si phase. The carbonaceous material has a high harge-discharge capacity and improved cycle-life characteristics.

Growing community of inventors

Ohsan, South Korea

Kyou-Yoon Sheem