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    • 4. 发明申请
    • POUCH-TYPE LITHIUM SECONDARY BATTERY
    • 袋型锂二次电池
    • WO2009084928A3
    • 2009-10-15
    • PCT/KR2008007881
    • 2008-12-31
    • LG CHEMICAL LTDLEE HO-CHUNCHO JEONG-JUJEON JONG-HO
    • LEE HO-CHUNCHO JEONG-JUJEON JONG-HO
    • H01M4/587H01M10/0525H01M10/0569
    • H01M10/0525H01M2/0207H01M4/587H01M10/0569H01M2300/0025
    • A pouch-type lithium secondary battery includes an electrode assembly having an anode made of carbon material capable of occluding or emitting lithium ions, a cathode made of lithium-containing oxide, and a separator interposed between the cathode and the anode for electrical insulation therebetween; a pouch-type case made of sheet to provide a space receiving the electrode assembly; and a non-aqueous electrolyte injected into the electrode assembly. The non-aqueous electrolyte is a non-linear carbonate-based non-aqueous electrolyte including a lithium salt, (a) a cyclic carbonate compound, and (b) a linear ester compound selected from propionate-based compound, methyl butyrate, and propyl acetate, or their mixtures. During LiPF6 IM dissolution, the non-aqueous electrolyte has an ion conductivity of 9 mS/cm or above at about 23 °C. This pouch-type lithium secondary battery ensures excellent high-rate discharging characteristics and solves swelling problems associated with a pouch-type lithium secondary battery.
    • 一种袋型锂二次电池,包括:电极组件,其具有由能够吸留或释放锂离子的碳材料制成的阳极,由含锂氧化物制成的阴极以及插入在阴极和阳极之间用于电绝缘的隔板; 由片材制成的袋型外壳,以提供容纳电极组件的空间; 和注入电极组件中的非水电解质。 非水电解质是包含锂盐的非线性碳酸酯类非水电解质,(a)环状碳酸酯化合物和(b)选自丙酸酯类化合物,丁酸甲酯和丙基丙烯酸酯的直链酯化合物 醋酸盐或它们的混合物。 在LiPF 6 IM溶解过程中,非水电解质在约23℃具有9mS / cm或更高的离子电导率。 这种袋型锂二次电池确保了优异的高速放电特性并且解决了与袋型锂二次电池相关的膨胀问题。