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    • 1. 发明授权
    • Pouch-type lithium secondary battery
    • 袋式锂二次电池
    • US08741473B2
    • 2014-06-03
    • US12810541
    • 2008-12-31
    • Ho-Chun LeeJeong-Ju ChoJong-Ho Jeon
    • Ho-Chun LeeJeong-Ju ChoJong-Ho Jeon
    • H01M2/02H01M6/16
    • 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.
    • 袋型锂二次电池包括具有由能够吸留或发射锂离子的碳材料制成的阳极的电极组件,由含锂氧化物制成的阴极和插入在阴极和阳极之间的用于电绝缘的隔膜; 由片材制成的袋状壳体,以提供容纳电极组件的空间; 和注入到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,丁酸甲酯和丙基的直链酯化合物 乙酸酯或它们的混合物。 在LiPF 6 IM溶出期间,非水电解质在约23℃下的离子电导率为9mS / cm以上。该袋式锂二次电池确保了优异的高倍率放电特性,并且解决了与袋状锂离子电池相关的溶胀问题, 型锂二次电池。