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    • 4. 发明申请
    • SECONDARY BATTERY HAVING IMPROVED LONG-TERM RELIABILITY AGAINST MOISTURE PENETRATION
    • 具有改善水分渗透的长期可靠性的二次电池
    • WO2013032266A2
    • 2013-03-07
    • PCT/KR2012006979
    • 2012-08-31
    • LG CHEMICAL LTDKIM YO-JINCHOI SEUNG-DONPARK SUNG-JOON
    • KIM YO-JINCHOI SEUNG-DONPARK SUNG-JOON
    • H01M2/08
    • H01M2/08H01M2/021H01M2/0212H01M2/0275H01M2/0287
    • Disclosed in the present invention is a secondary battery having improved long-term reliability against moisture penetration. A pouch-type secondary battery according to the present invention is characterized by comprising: an electrode assembly having an electrode lead attached thereto; and a pouch packing material which accommodates the electrode assembly such that a portion of the electrode lead may be outwardly exposed and which has a sealing portion formed along an edge thereof, wherein the sealing portion has a characteristic length of 10 to 19mm2/mm. According to the present invention, the characteristic length of the sealing portion of the pouch-type secondary battery is limited to a fixed range, thus limiting as much as possible a reduction in capacity of a secondary battery caused by the area occupied by the sealing portion while improving reliability against moisture penetration which might occur due to the long-term use of the secondary battery.
    • 在本发明中公开了一种二次电池,其具有改善的耐潮湿渗透性的长期可靠性。 根据本发明的袋型二次电池的特征在于包括:电极组件,其具有连接到其上的电极引线; 以及容纳电极组件的袋包装材料,使得电极引线的一部分可以向外露出,并且具有沿其边缘形成的密封部分,其中密封部分具有10至19mm 2 / mm的特征长度。 根据本发明,袋式二次电池的密封部分的特征长度被限制在固定范围内,从而尽可能地限制由密封部分占据的面积引起的二次电池容量的降低 同时提高由于长期使用二次电池而可能发生的湿气渗透的可靠性。
    • 5. 发明申请
    • POSITIVE ELECTRODE ACTIVE MATERIAL, AND POSITIVE ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME
    • 正极电极活性材料,以及包含其的正极和锂二次电池
    • WO2010137889A3
    • 2011-03-31
    • PCT/KR2010003367
    • 2010-05-27
    • LG CHEMICAL LTDHONG SEUNG-TAEKPARK HEY WOONGJEON HO JINPARK SUNG JOONCHOI DAE SIKYUN NAN JIKIM YO JINCHOI SEUNG DON
    • HONG SEUNG-TAEKPARK HEY WOONGJEON HO JINPARK SUNG JOONCHOI DAE SIKYUN NAN JIKIM YO JINCHOI SEUNG DON
    • H01M4/58C01B25/45H01M4/583H01M4/64H01M10/0525
    • H01M4/13H01M4/02H01M4/364H01M4/525H01M4/5825H01M4/661H01M4/70H01M2004/021H01M2010/4292
    • The present invention relates to a positive electrode active material, and to a positive electrode and to a lithium secondary battery comprising same, and more particularly, to a positive electrode active material in which an active material having superior thermal stability is employed and two types of active materials having different particle sizes are used to increase the volume density of the positive electrode active material. The present invention also relates to a positive electrode and to a lithium secondary battery comprising the positive electrode active material. The positive electrode active material of the present invention comprises a small diameter active material having a mean diameter of 0.5 µm and a maximum diameter of 1 µm or smaller, and a large diameter active material having a mean diameter of 5 to 20 µm and a maximum diameter of 100 µm or smaller. The composite positive electrode active material of the present invention is provided with improved packing density as the large diameter active material and the small diameter active material are mixed therein at a predetermined grain size ratio and weight ratio. The composite positive electrode active material of the present invention contains high-stability/high-conductivity materials to achieve improved volume density, discharge capacity, thermal stability and high-rate discharge properties.
    • 本发明涉及正极活性物质,以及与正极和包含该正极的锂二次电池,更具体地说,涉及使用具有优异的热稳定性的活性物质的正极活性物质和两种 使用具有不同粒径的活性物质来增加正极活性物质的体积密度。 本发明还涉及一种正极和包含正极活性物质的锂二次电池。 本发明的正极活性物质包含平均直径为0.5μm,最大直径为1μm以下的小直径活性物质,平均直径为5〜20μm的最大直径的活性物质为最大值 直径为100μm以下。 本发明的复合正极活性物质以规定的粒径比和重量比将大直径活性物质和小直径活性物质混合在一起,具有改善的填充密度。 本发明的复合正极活性物质含有高稳定性/高导电性的材料,以实现体积密度,放电容量,热稳定性和高倍率放电性能的提高。