发明名称 |
LITHIUM SECONDARY BATTERIES WITH CHARGE-CUTOFF VOLTAGES OVER 4.35 |
摘要 |
Disclosed is a lithium secondary battery comprising a cathode (C), an anode (A), a separator and an electrolyte, wherein the battery has a weight ratio (A/C) of anode active material (A) to cathode active material (C) per unit area of each electrode of between 0.44 and 0.70, and shows a charge cut-off voltage of between 4.35V and 4.6V. The high-voltage lithium secondary battery satisfies capacity balance by controlling the weight ratio (A/C) of anode active material (A) to cathode active material (C) per unit area of each electrode. Therefore, it is possible to significantly increase the available capacity and average discharge voltage of a battery using a lithium/cobalt-based cathode active material, which shows an available capacity of about 50% in a conventional 4.2V-battery. Additionally, it is possible to significantly improve battery safety under overcharge conditions, and thus to provide a high-voltage and high-capacity lithium secondary battery having excellent safety and long service life. |
申请公布号 |
EP1771912(A4) |
申请公布日期 |
2007.10.03 |
申请号 |
EP20050746061 |
申请日期 |
2005.05.27 |
申请人 |
LG CHEMICAL LTD. |
发明人 |
KIM, DONG-MYUNG;YOON, JONG-MOON;KIM, YONG-JEONG;CHO, BENJAMIN;JEONG, JUN-YONG;JEONG, DAE-JUNE;BAE, JOON-SUNG |
分类号 |
H01M10/24;H01M10/052;H01M10/42 |
主分类号 |
H01M10/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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