Secondary particle and lithium battery including secondary particle

• Main Authors: KIM, JAE-MYUNG, KIM, TAE-SIK, KIM, DEOK-HYUN, LEE, JONG-HEE, KIM, YOUNG-SU, LEE, SO-RA, SHIN, CHANG-SU, DO, SEAN, YU, YONG-MI, KIM, BEOM-KWON, JOO, KYU-NAM, CHUNG, GU-HYUN
• Format: Patent
• Language: English; French; German
• Published: 10.08.2011
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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

A secondary particle and a lithium battery including the same are provided wherein the secondary particle includes a plurality of primary particles and each primary particle contains n polycyclic nano-sheets disposed upon one another. The polycyclic nano-sheets include hexagonal rings of six carbon atoms linked to each other, wherein a first carbon and a second carbon have a distance therebetween of L 1 . L 2 is a distance between a third carbon and a fourth carbon, and the arrangement of the polycyclic nano-sheets is such that L 1 ‰¥ L 2 . The secondary particle is used as a negative active material in the lithium battery, and the secondary particle contains pores, thereby allowing for effective intercalating and deintercalating of the lithium ions into the secondary particle to impart improved capacity and cycle lifespan.