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    • 8. 发明授权
    • Non-aqueous electrolyte secondary battery comprising composite particles
    • 包含复合颗粒的非水电解质二次电池
    • US06605386B1
    • 2003-08-12
    • US09601224
    • 2000-09-18
    • Shinji KasamatsuHiroshi YoshizawaKazuhiro OkamuraHizuru KoshinaHarunari ShimamuraYoshiaki Nitta
    • Shinji KasamatsuHiroshi YoshizawaKazuhiro OkamuraHizuru KoshinaHarunari ShimamuraYoshiaki Nitta
    • H01M462
    • H01M4/38H01M4/04H01M4/13H01M4/364H01M4/366H01M4/386H01M4/387H01M4/485H01M4/58H01M4/5835H01M6/10H01M10/0525H01M10/446H01M2010/4292
    • A non-aqueous electrolyte secondary battery comprises a positive electrode and a negative electrode capable of intercalating and de-intercalating lithium, a non-aqueous electrolyte and separators or solid electrolytes. The negative electrode contains, as a main component, composite particles constructed in such a manner that at least part of the surface of nuclear particles comprising at least one of tin, silicon and zinc as a constituent element, is coated with a solid solution or an inter-metallic compound composed of the element included in the nuclear particles and another predetermined element which is not an element included in the nuclear particles. To improve the ability of the battery, the composite particles mentioned above can include at least one trace element selected from iron, lead and bismuth. The porosity of a mixture layer at the negative electrode is 10% or more and 50% or less. The amount of the non-aqueous electrolyte, the thickness of the separators or the like is restricted in a specific value. The foregoing construction suppresses occurrence of an internal short circuit between the positive electrode and the negative electrode caused by expansion of the negative electrode materials, thereby achieving a high capacity battery with a superior charge/discharge cycle properties, which is suitable for a high-speed charging.
    • 非水电解质二次电池包括能够插入和脱嵌锂的正极和负极,非水电解质和隔膜或固体电解质。 作为主要成分的负极以作为构成要素的锡,硅,锌中的至少一种的核粒子的至少一部分表面的固体溶液或 由包含在核粒子中的元素构成的金属间化合物和不包含在核粒子中的元素的另一规定元素。 为了提高电池的能力,上述复合颗粒可以包括至少一种选自铁,铅和铋的痕量元素。 负极上的混合层的孔隙率为10%以上且50%以下。 非水电解质的量,分离器的厚度等被限制在特定值。 上述结构抑制了由负极材料的膨胀引起的正极和负极之间的内部短路的发生,从而实现了具有优良的充放电循环特性的高容量电池,适用于高速 充电。
    • 9. 发明授权
    • Separator and non-aqueous electrolyte secondary battery
    • 分离器和非水电解质二次电池
    • US08288038B2
    • 2012-10-16
    • US12067910
    • 2007-05-17
    • Shinji KasamatsuKazuhiro Okamura
    • Shinji KasamatsuKazuhiro Okamura
    • H01M4/00H01M2/16
    • H01M2/1653H01M2/1686H01M10/05
    • In a non-aqueous electrolyte secondary battery, a separator in which its dynamic hardness DH obtained when the load to an indenter reaches 12 kgf/cm2 is 1000 or more is used. This separator includes at least one porous layer X including a polyolefin, and at least one porous layer Y including a heat resistant resin. The porosity of the porous layer X is 35% or more and 65% or less. In a pore size distribution of the porous layer X measured with a mercury porosimeter, a ratio of pores having a pore size of 0.02 μm or more and 0.2 μm or less is 40 vol % or more relative to a total pore volume. The thermal deformation temperature of the heat resistant resin is 160° C. or more.
    • 在非水电解质二次电池中,使用当压头的负荷达到12kgf / cm2时获得的动态硬度DH为1000以上的隔膜。 该隔板包括至少一个包括聚烯烃的多孔层X和至少一个包含耐热树脂的多孔层Y. 多孔层X的孔隙率为35%以上且65%以下。 在用水银孔隙度计测定的多孔层X的孔径分布中,孔径为0.02μm以上且0.2μm以下的孔的比率相对于总孔体积为40体积%以上。 耐热树脂的热变形温度为160℃以上。