Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Seoul National University

Seok-gwang Doo

Dong-min Im

Jin-hwan Park

Seung-sik Hwang

Jae-gu Yoon

Han-su Kim

Gue-sung Kim

Jae-man Choi

Moon-seok Kwon

Boris Aleksandrovich Trofimov

Doo-yeon Lee

Kyu-sung Park

Nina K Gusarova

Jae-young Choi

Sung-Jin Kim

Chan-ho Pak

Hyuk Jae Chang

Shang-hyeun Park

Min-sang Song

Jeong-hee Lee

Young-Hee Lee

Jeong-na Heo

Tae-won Jeong

Jeong-kuk Shon

Jeong-Hee Lee

Han-Su Kim

Kay-hyeok An

Sang-Hyun Sung

Hun-joon Sohn

Bok-hwan Jung

Young-su Chung

Yoo-jung Kwon

Yuong-soo Son

Yasumasa Hirai

Su-keun Yoon

Sung-Il Lee

Jae-phil Cho

Hyo-jin Lee

A flexible secondary battery includes an electrode stack structure. The electrode stack structure includes a first electrode layer including a first metal current collector, a second electrode layer including a second metal current collector, an isolation layer between the first electrode layer and the second electrode layer, connection tabs respectively extended from an end portion of the first metal current collector at a first end portion of the first electrode layer and an end portion of the second metal current collector at a first end portion of the second electrode layer; and a fixing element which fixes the end portions of the first and second metal current collectors only at a first end portion of the electrode stack structure. Second end portions of the first and second electrode layers opposite to the first end portions thereof are movable.

Flexible secondary battery

A three-dimensional shaped battery includes a cell structure including a first electrode layer, a second electrode layer, and a separation layer disposed between the first electrode layer and the second electrode layer, where the cell structure may include a plurality of pattern units having different sizes from each other and a connecting portion which connects the pattern units to each other.

Three dimensional shaped battery

A cathode active material includes a lithium metal phosphate represented by Formula 1; and one or more compounds selected from the group consisting of a metal oxynitride, a metal nitride, and a mixture thereof:LiMPO&#x2003;&#x2003;&#x3c;Formula 1&#x3e;

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

A cathode including an active material composite and a lithium battery using the same. The active material composite of the cathode includes a mixed oxide complex and a lithium-containing compound, the lithium-containing compound having a metal based compound coated on the surface of the lithium-containing compound.

Cathode comprising active material composite and lithium battery using the same

A composite anode active material including: a metal capable of alloy formation with lithium; an intermetallic compound; and a solid solution, in which the solid solution is an alloy of the metal capable of alloy formation with lithium and the intermetallic compound, and the solid solution and the intermetallic compound have a same crystal structure.

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

An anode active material including a tin (Sn)-cobalt (Co) intermetallic compound, titanium (Ti), and carbon (C). The anode active material can include indium (In), niobium (Nb), germanium (Ge), molybdenum (Mo), aluminum (Al), phosphorus (P), gallium (Ga), bismuth (Bi), and/or silicon (Si). The anode active material can be included in an anode, and the anode can be included in lithium battery.

Anode active material, and anode and lithium battery containing the same

Organic electrolytic solutions are provided. One solution includes a lithium salt, an organic solvent including a first solvent having high permittivity and a second solvent having a low boiling point, and a phosphate compound. By using the phosphate based compound, the organic electrolytic solution and the lithium battery including the organic electrolytic solution are flame resistant and have excellent charge/discharge properties. As a result, the lithium battery is highly stable and reliable and has good charge/discharge efficiency.

Organic electrolytic solution and lithium battery using the same

A surface treated anode and a lithium battery using the same are provided. The surface treated anode includes a current collector, and an anode active material layer formed on the current collector. The anode active material layer is treated with an amine group containing compound.

Surface treated anode and lithium battery using the same

Carbon nanotubes and metal particle-containing carbon nanotubes are provided. The carbon nanotubes have increased surface area. A method of cutting carbon nanotubes is also provided. According to the method, the dispersion properties of the carbon nanotubes are improved by simplifying the structural changes and/or surface modifications of the carbon nanotubes, thereby enabling insertion of an active substance into the inner walls of the carbon nanotubes and increasing the insertion efficiency.

Method of cutting carbon nanotubes

Carbon nanotubes have an R value of at least 1.3, where R is defined as the ratio (I/I) of an integral value of D band intensity (I) to an integral value of G band intensity (I) in the Raman spectrum. Such carbon nanotubes can be used to form a support catalyst with good catalyst activity because the surface defects on the carbon nanotubes promote improved catalyst distribution in that the support catalyst includes catalyst particles having a small mean particle size and a slight variation in particle size. Such a support catalyst has particularly useful properties when used as a catalyst layer for a fuel cell electrode.

Carbon nanotube, support catalyst, method of preparing the support catalyst and a fuel cell comprising the support catalyst

An organic electrolytic solution is provided which includes a lithium salt, an organic solvent including a first solvent having high permittivity and a second solvent having a low boiling point, and a phosphine oxide compound The phosphine oxide compound imparts flame resistance and good charge/discharge properties, thereby producing a lithium battery that is highly stable and reliable and that has good charge/discharge efficiency.

Methods of preparing capped metal nanocrystals are provided. One method includes reacting a metal nanocrystal precursor with a reducing agent in a solution having a platinum catalyst.

Method of preparing metal nanocrystal

An organic electrolyte containing an organic solvent mixture and a lithium (Li) salt, and a lithium secondary cell adopting the electrolyte. The organic electrolyte contains the organic solvent mixture comprising a solvent having a high dielectric constant, a solvent having a low viscosity and a compound expressed by the following chemical formula (1): ##STR1## wherein R.sub.1 and R.sub.2 are independently C.sub.1 to C.sub.3 linear or cyclic alkyl, and x is an integer from 1 to 4. The organic electrolyte for a lithium secondary cell is improved in ion conductivity, low-temperature storage characteristics, and a wide potential window region. Also, the lithium salt may be a mixture of inorganic lithium salts and organic lithium salts. A lithium secondary cell adopting the electrolyte containing both inorganic lithium salts and organic lithium salts has a large capacity and stable charging/discharging characteristics, thereby improving high-temperature characteristics, self-discharging characteristics as well as life span characteristics.

Organic electrolyte and lithium secondary cell employing the same

A polymer solid electrolyte that is useable in a lithium secondary cell comprising a polymer matrix, a polymerization initiator, an inorganic salt and a solvent. The polymer matrix is composed of a copolymer of a monomer having an amide group at a side chain and a polymer with an oxyethylene repeating unit. The polymer solid electrolyte has excellent conductivity and can easily be processed due to its good mechanical property.

Growing community of inventors

Seoul, South Korea

Seok-gwang Doo