Title:
HIGH-CAPACITY POSITIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2011/105832
Kind Code:
A2
Abstract:
The present invention relates to a high-capacity lithium secondary battery which comprises layered lithium manganese oxides and spinel lithium manganese oxides that exhibit high irreversible capacity when the battery is overcharged at a high voltage, and which is activated at a high voltage of 4.45V or higher on a positive electric potential basis, thereby providing additional lithium for the utilization of a 3V region of the spinel lithium manganese oxides and enabling the lithium secondary battery to have a uniform profile over the entire SOC region. According to the present invention, the high-capacity lithium secondary battery comprises a mixture of positive electrode active materials containing the spinel lithium manganese oxides and the layered lithium manganese oxides, and is charged at a high voltage, thereby improving safety, and preventing low output caused by a sudden voltage drop in a specific SOC region, thus widening an available SOC region and improving safety.
Inventors:
OH, Song Taek (106-810, Chowon Apt.,Mannyeon-dong, Seo-gu, Daejeon 302-740, 302-740, KR)
오송택 (대전 서구 만년동 초원아파트 106-810, 302-740 Daejeon, 302-740, KR)
KIM, Sun Kyu (6-303, LG Chemical Employee Apt.381-42, Doryong-dong, Yuseong-gu, Daejeon 305-340, 305-340, KR)
김선규 (대전 유성구 도룡동 381-42 LG화학 사원아파트 6-303, 305-340 Daejeon, 305-340, KR)
CHUNG, Geun Chang (2 Banseokmaeul Apt, Jijok-dong Yuseong-gu, Daejeon 305-772, 305-772, KR)
정근창 (대전 유성구 지족동 반석마을아파트, 305-772 Daejeon, 305-772, KR)
오송택 (대전 서구 만년동 초원아파트 106-810, 302-740 Daejeon, 302-740, KR)
KIM, Sun Kyu (6-303, LG Chemical Employee Apt.381-42, Doryong-dong, Yuseong-gu, Daejeon 305-340, 305-340, KR)
김선규 (대전 유성구 도룡동 381-42 LG화학 사원아파트 6-303, 305-340 Daejeon, 305-340, KR)
CHUNG, Geun Chang (2 Banseokmaeul Apt, Jijok-dong Yuseong-gu, Daejeon 305-772, 305-772, KR)
정근창 (대전 유성구 지족동 반석마을아파트, 305-772 Daejeon, 305-772, KR)
Application Number:
KR2011/001299
Publication Date:
September 01, 2011
Filing Date:
February 24, 2011
Export Citation:
Assignee:
LG CHEM. LTD. (LG Twin Towers, 20 Yeouido-dong Yeongdeungpo-gu, Seoul 150-721, 150-721, KR)
주식회사 엘지화학 (서울 영등포구 여의도동 20번지 LG트윈타워빌딩, 150-721 Seoul, 150-721, KR)
OH, Song Taek (106-810, Chowon Apt.,Mannyeon-dong, Seo-gu, Daejeon 302-740, 302-740, KR)
오송택 (대전 서구 만년동 초원아파트 106-810, 302-740 Daejeon, 302-740, KR)
KIM, Sun Kyu (6-303, LG Chemical Employee Apt.381-42, Doryong-dong, Yuseong-gu, Daejeon 305-340, 305-340, KR)
김선규 (대전 유성구 도룡동 381-42 LG화학 사원아파트 6-303, 305-340 Daejeon, 305-340, KR)
CHUNG, Geun Chang (2 Banseokmaeul Apt, Jijok-dong Yuseong-gu, Daejeon 305-772, 305-772, KR)
주식회사 엘지화학 (서울 영등포구 여의도동 20번지 LG트윈타워빌딩, 150-721 Seoul, 150-721, KR)
OH, Song Taek (106-810, Chowon Apt.,Mannyeon-dong, Seo-gu, Daejeon 302-740, 302-740, KR)
오송택 (대전 서구 만년동 초원아파트 106-810, 302-740 Daejeon, 302-740, KR)
KIM, Sun Kyu (6-303, LG Chemical Employee Apt.381-42, Doryong-dong, Yuseong-gu, Daejeon 305-340, 305-340, KR)
김선규 (대전 유성구 도룡동 381-42 LG화학 사원아파트 6-303, 305-340 Daejeon, 305-340, KR)
CHUNG, Geun Chang (2 Banseokmaeul Apt, Jijok-dong Yuseong-gu, Daejeon 305-772, 305-772, KR)
International Classes:
H01M4/505; B60L11/18; H01M4/583; H01M10/0525
Attorney, Agent or Firm:
KIM, In Han et al. (5F Korean Re Bldg, 80 Soosong-Dong, Chongro-Ku, Seoul 110-733, 110-733, KR)
Claims:
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