Samsung Electronics Co., Ltd.

Samsung Display Devices Co., Ltd.

Ho-jin Kweon

Dong-Gon Park

Sung-soo Kim

Soon-kyo Hong

Jin Koo Kang

Hye-jin Kim

Keon Soo Kim

Geun-bae Kim

Hye-young Kwon

Hyu-bum Park

Kae-dong Baek

Active material for positive electrode used in lithium secondary battery and method of manufacturing same

A method of preparing a composite of organic and inorganic compounds includes the steps of reacting a mixed solution of a metal alkoxide and a silicon-containing compound with a catalyst to produce an alcogel of a metal oxide or a complex metal oxide. The metal alkoxide is prepared by reacting at least one metal with an alcohol and the mixed solution is prepared by mixing the metal alkoxide with the silicon-containing compound. An alcogel is produced from the reacting step and alcohol is impregnated within the inorganic oxide lattice structure of the alcogel. Furthermore, the method of preparing a composite of an organic and an inorganic compound includes the steps of centrifuging the alcogel to separate any alcohol from the alcogel to form a gel, adding an organic monomer the gel and polymerizing the organic monomer in-situ to form an organic polymer. The resulting composite has characteristics of both the parent organic and inorganic compounds.

Method of preparing a composite of organic and inorganic compounds

A method for fabricating a porous composite oxide is provided. The method includes the steps of: (a) slowly mixing a solution including a silicon oxide source and a solution including an aluminum oxide source; (b) adding hydrochloric acid to the mixed solution prepared in said step (a) to obtain a sol; and (c) adding sodium hydroxide to said sol, reacting the obtained resultant at room temperature for 30 minutes to 12 hours, and drying the resultant. The porous composite oxide has an abundance of fine pores and the distribution of pore size is relatively uniform, so that the porous composite oxide is suitable for a carrier.

Method for fabricating porous composite oxide

Carbon-doped lithium manganese oxides in crystalline powder form can be used as electrode material. The carbon-doped lithium manganese oxide is prepared by a process including the steps of: preparing a first solution of a lithium compound and a manganese compound, said first solution having lithium ions and manganese ions at a mole ratio of 1:2; preparing a solution of polyethylene glycol and adding the polyethylene glycol solution to said first solution to form a second solution and then drying the second solution until a gel is obtained while stirring the second solution; and pre-treating said gel and then heating the pre-treated gel.

Carbon-doped lithium manganese oxide and manufacturing method therefor

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Suwon, South Korea

Ho-jin Kweon