Title:
LITHIUM SECONDARY BATTERY WITH IMPROVED ENERGY DENSITY
Document Type and Number:
WIPO Patent Application WO/2010/093219
Kind Code:
A3
Abstract:
The present invention relates to a lithium secondary battery with improved energy density. The lithium secondary battery comprises an anode using a cathode active material containing a lithium-mixed transition metal oxide which occludes and releases lithium ions. The final discharge voltage is 1.5~2.75 V. The final discharge voltage can be lowered from the conventional 3.0 V to 1.5~2.75 V by using various lithium-mixed transition metal oxides as a cathode active material or mixing with an LCO-based anode material. The conventional LCO-based anode material does not have differences in capacity or energy density despite the lowered final discharge voltage. However, as a result of using the anode material of the present invention, capacity can be additionally improved by 10~20% by lowering the final discharge voltage.
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Inventors:
KIM HONG JEONG (KR)
KU CHA HUN (KR)
KIM SOO RYOUNG (KR)
PARK HONG KYU (KR)
KU CHA HUN (KR)
KIM SOO RYOUNG (KR)
PARK HONG KYU (KR)
Application Number:
PCT/KR2010/000946
Publication Date:
November 25, 2010
Filing Date:
February 16, 2010
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
KIM HONG JEONG (KR)
KU CHA HUN (KR)
KIM SOO RYOUNG (KR)
PARK HONG KYU (KR)
KIM HONG JEONG (KR)
KU CHA HUN (KR)
KIM SOO RYOUNG (KR)
PARK HONG KYU (KR)
International Classes:
H01M4/485; H01M4/583; H01M10/0525; H01M10/44
Foreign References:
| KR20070109854A | 2007-11-15 | |||
| US6436577B1 | 2002-08-20 |
Other References:
X. LIU ET AL.: "A mixture of LiNil/3Co1/3Mn1/302 and LiCo02 as positive active material of LIB for power application", JOURNAL OF POWER SOURCES, vol. 174, no. 2, 6 December 2007 (2007-12-06), pages 1126 - 1130, XP022355233
Attorney, Agent or Firm:
KIM, In Han et al. (1490-25Seocho-dong, Seocho-gu, Seoul 137-070, KR)
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Claims: