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    • 1. 发明授权
    • Lithium secondary battery having improved stability to overcharge
    • 具有提高过充电稳定性的锂二次电池
    • US07625669B2
    • 2009-12-01
    • US11406656
    • 2006-04-19
    • Bo Hyun KimKwangho YooHyunwoo ParkHey Woong ParkJisang Yu
    • Bo Hyun KimKwangho YooHyunwoo ParkHey Woong ParkJisang Yu
    • H01M4/60H01M10/50
    • H01M4/62H01M10/052H01M10/0567H01M10/4235
    • Disclosed is a lithium secondary battery comprising an electrode assembly composed of a cathode, an anode and a separator, and a lithium electrolyte, wherein the electrodes and/or electrolyte include a compound (“urethane compound”) and/or polymer (“poly urethane”) which are decomposed upon overcharge of the battery and contain a urethane group in a molecular structure thereof.The lithium secondary battery of the present invention is characterized by addition of a compound or polymer having a urethane group to electrodes and/or electrolyte, wherein the thus-added compound and/or polymer have substantially no adverse effects on general performance of the battery under normal operating conditions and are decomposed with high reliability upon overcharge of the battery, thereby offering time delay effects for securing battery safety, and the decomposition products thereof result in sharply increased internal resistance of the battery, thereby increasing battery safety.
    • 公开了一种锂二次电池,其包括由阴极,阳极和隔板以及锂电解质构成的电极组件,其中电极和/或电解质包括化合物(“氨基甲酸酯化合物”)和/或聚合物(“聚氨酯 “),其在电池的过充电时分解,并且在分子结构中含有氨基甲酸酯基。 本发明的锂二次电池的特征在于向电极和/或电解质添加具有氨基甲酸酯基团的化合物或聚合物,其中由此添加的化合物和/或聚合物对电池的一般性能基本上没有不利影响 正常工作条件,并且在电池过充电时以高可靠性分解,从而为确保电池安全性提供时间延迟效果,并且其分解产物导致电池内部电阻急剧增加,从而增加电池安全性。