POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY

• Main Authors: CHANG, BUM JIN, JANG, WOON SUK, KIM, KI JUN, CHOI, KWI SEOK, CHO, CHAE WOONG
• Format: Patent
• Language: English; Korean
• Published: 13.06.2012
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OR TREATMENT THEREOF; NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS,MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES ASDISCRETE UNITS; NANOTECHNOLOGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

PURPOSE: A positive electrode active material for a lithium secondary battery and a lithium secondary battery including thereof are provided to enhance volumetric energy density and load property by having low electric resistance. CONSTITUTION: A positive electrode active material for a lithium secondary battery(1) comprises carbon material and olivine-based compound containing lithium which is attached to surface of the carbon material. The carbon material has a laminated structure which is formed by laminating polycyclic nano-sheets. The polycyclic nano-sheets are manufactured by condensing hexagonal shaped carbon rings and arranging on one plane. Here, n stands for integer of 1-30. An average particle size of the carbon material is 300 nano meters - 50 micron.