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    • 1. 发明授权
    • Electrode and battery using the same
    • 电极和电池使用相同
    • US07229713B2
    • 2007-06-12
    • US10486049
    • 2003-06-18
    • Takeru YamamotoGentaro KanoHiroyuki Akashi
    • Takeru YamamotoGentaro KanoHiroyuki Akashi
    • H01M4/02H01M10/40
    • H01M4/02H01M4/13H01M10/052H01M10/0587H01M2004/021H01M2004/028
    • Provided are an electrode and a battery having superior charge-discharge cycle characteristics and capable of obtaining a higher energy density. The battery comprises a spirally wound electrode body (20) including a cathode (21) and an anode (22) spirally wound with a separator (23) in between. During charge, lithium metal is precipitated on the anode (22), so the capacity of the anode (22) is represented by the sum of a capacity component by insertion and extraction of lithium and a capacity component by precipitation and dissolution of the lithium metal. The anode (22) includes a mixture layer (22b) having a powdered anode active material, and the mixture layer (22b) has liquid absorption properties that when 1 μdm3 of propylene carbonate is dropped on the mixture layer (22b) at 23° C., a contact angle that the mixture layer (22b) forms with a propylene carbonate drop becomes 10 degrees within 100 seconds. Thereby, the mixture layer (22b) is impregnated with an electrolyte solution quickly and uniformly, so lithium metal is uniformly precipitated on the whole mixture layer (22b).
    • 提供了具有优异的充放电循环特性并且能够获得更高能量密度的电极和电池。 电池包括螺旋卷绕的电极体(20),其包括阴极(21)和在其间螺旋地缠绕有隔板(23)的阳极(22)。 在充电期间,锂金属在阳极(22)上沉淀,因此阳极(22)的容量由锂的插入和提取的容量分量和通过锂金属的沉淀和溶解的容量分量之和表示 。 阳极(22)包括具有粉末状阳极活性物质的混合物层(22b),并且混合物层(22b)具有液体吸收性质,当将碳酸丙烯酯的1% 混合层(22b)在23℃下,混合层(22b)与碳酸丙烯酯滴形成的接触角在100秒内变为10度。 由此,混合层(22b)迅速且均匀地浸渍电解质溶液,使锂金属在整个混合层(22b)上均匀地沉淀。