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    • 2. 发明授权
    • Non-aqueous electrolyte secondary battery
    • 非水电解质二次电池
    • US07223495B2
    • 2007-05-29
    • US11073511
    • 2005-03-07
    • Fumito KameyamaFumiko HaraTsuyoshi SugiyamaMichiko Komiyama
    • Fumito KameyamaFumiko HaraTsuyoshi SugiyamaMichiko Komiyama
    • H01M2/00
    • H01M4/131H01M2/0212H01M2/0267H01M2/0275H01M2/0287H01M4/02H01M4/133H01M4/1391H01M4/1393H01M4/505H01M4/525H01M4/62H01M6/10H01M6/168H01M10/0525H01M10/0565H01M10/0567H01M10/0587H01M10/4235H01M2004/021H01M2300/0082H01M2300/0085
    • A non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode collector, on which a positive electrode active material layer containing a positive electrode active material as a complex oxide of Li and transition metals are formed, and a negative electrode having a negative collector, on which a negative electrode active material layer is formed. The non-aqueous electrolyte secondary battery is a gel or solid non-aqueous electrolyte secondary battery having a battery device in which a positive electrode and a negative electrode are laminated with an electrolyte layer therebetween in a film-state packaging member constructed by metal foil laminated films, and containing a lithium salt, a non-aqueous solvent, and a polymer material. The concentration in mass ratio of a free acid in the electrolyte layer is 60 ppm and less. Average particle diameter of the positive electrode active material lies in a range from 10 to 22 μm, the minimum particle diameter is 5 μm or larger, the maximum particle diameter is 50 μm or smaller, and specific surface of the positive electrode active material is 0.25 m2/g or smaller. Lithium carbonate (Li2CO3) contained in the positive electrode active material is 0.15 percent by weight and less. Moisture contained in the positive electrode active material is 300 ppm and less.
    • 非水电解质二次电池具有具有正极集电体的正极,形成含有作为Li和过渡金属的复合氧化物的正极活性物质的正极活性物质层,负极具有负极 集电体,其上形成有负极活性物质层。 非水电解质二次电池是具有电池装置的凝胶或固体非水电解质二次电池,其中正极和负极之间具有电解质层,在由金属箔层压的薄膜状包装构件中层压 膜,并含有锂盐,非水溶剂和聚合物材料。 电解质层中的游离酸的质量比的浓度为60ppm以下。 正极活性物质的平均粒径在10〜22μm的范围内,最小粒径为5μm以上,最大粒径为50μm以下,正极活性物质的比表面为0.25 m 2 / g以下。 正极活性物质中所含的碳酸锂(Li 2 CO 3 3)为0.15重量%以下。 正极活性物质中含有的水分为300ppm以下。