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    • 3. 发明申请
    • Nonaqueous electrolyte secondary battery, nonaqueous electrolyte, and charging method therefor
    • 非水电解质二次电池,非水电解质及其充电方法
    • US20070172730A1
    • 2007-07-26
    • US11656486
    • 2007-01-23
    • Masato IwanagaYukihiro OkiKoji AbeKazuhiro Miyoshi
    • Masato IwanagaYukihiro OkiKoji AbeKazuhiro Miyoshi
    • H01M10/40H01M4/50H01M4/52
    • H01M10/0567H01M4/131H01M4/485H01M4/505H01M4/525H01M10/0569H01M2300/004
    • A nonaqueous electrolyte secondary battery of the invention has a positive electrode having a positive electrode active material, a negative electrode, and a nonaqueous electrolyte having electrolyte salt in a nonaqueous solvent. The electric potential of the positive electrode active material is 4.4 to 4.6 V relative to lithium, and the nonaqueous electrolyte contains a compound expressed by structural formula (I) below. The quantity of compound added is preferably 0.1% to 2% by mass. Also, the positive electrode active material preferably comprises a mixture of a lithium-cobalt composite oxide which is LiCoO2 containing at least both zirconium and magnesium and a lithium-manganese-nickel composite oxide that has a layer structure and contains at least both manganese and nickel. Thanks to such structure, a nonaqueous electrolyte secondary battery can be provided that is charged to charging termination potential of 4.4 to 4.6 V relative to lithium and that has enhanced overcharging safety.[Chemical Formula 1]
    • 本发明的非水电解质二次电池具有正极,具有正极活性物质,负极和非水电解质,在非水溶剂中具有电解质盐。 正极活性物质的电位相对于锂为4.4〜4.6V,非水电解质含有下述结构式(I)表示的化合物。 化合物的添加量优选为0.1质量%〜2质量%。 此外,正极活性物质优选含有至少含有锆和镁两者的LiCoO 2 2的锂 - 钴复合氧化物和具有层结构的锂 - 锰 - 镍复合氧化物的混合物 并且至少含有锰和镍。 由于这样的结构,可以提供非水电解质二次电池,其相对于锂充电至4.4至4.6V的充电终止电位,并且具有增强的过充电安全性。 [化学式1]
    • 4. 发明申请
    • Nonaqueous electrolyte secondary battery
    • 非水电解质二次电池
    • US20070178380A1
    • 2007-08-02
    • US10584266
    • 2004-12-24
    • Masato IwanagaHideyuki InomataKeisuke OogaKoji AbeKazuhiro Miyoshi
    • Masato IwanagaHideyuki InomataKeisuke OogaKoji AbeKazuhiro Miyoshi
    • H01M4/58H01M10/40
    • H01M10/0567H01M4/131H01M4/133H01M10/0525H01M10/0569
    • A nonaqueous electrolyte secondary battery comprising a negative electrode constituted of a carbonaceous material permitting reversible insertion and desorption of lithium, a positive electrode permitting reversible insertion and desorption of lithium, a separator separating these positive electrode and negative electrode from each other and a nonaqueous electrolyte composed of an organic solvent and, dissolved therein, a solute of lithium salt, wherein the nonaqueous electrolyte contains vinylene carbonate and di(2-propynyl) oxalate, these vinylene carbonate and di(2-propynyl) oxalate added in an amount of 0.1 to 3.0% by mass and 0.1 to 2.0% by mass, respectively, based on the mass of the nonaqueous electrolyte. Thus, there can be provided a nonaqueous electrolyte secondary battery wherein a stable SEI surface coating is formed to thereby exhibit a large initial capacity and excel in cycle characteristics at high temperature and wherein any cell swelling is slight.
    • 一种非水电解质二次电池,包括由允许锂的可逆插入和解吸的碳质材料构成的负极,允许锂的可逆插入和解吸的正极,将这些正极和负极彼此分离的隔板和构成的非水电解质 的有机溶剂中溶解有锂盐溶质,其中非水电解质含有碳酸亚乙烯酯和草酸二(2-丙炔基)酯,这些碳酸亚乙烯酯和草酸二(2-丙炔基)的添加量为0.1〜3.0 质量%,以质量计0.1〜2.0质量%。 因此,可以提供一种非水电解质二次电池,其中形成稳定的SEI表面涂层,从而表现出大的初始容量,并且在高温下具有优异的循环特性,并且其中任何电池膨胀都很小。
    • 5. 发明授权
    • Nonaqueous electrolyte secondary battery, nonaqueous electrolyte, and charging method therefor
    • 非水电解质二次电池,非水电解质及其充电方法
    • US08026000B2
    • 2011-09-27
    • US11656486
    • 2007-01-23
    • Masato IwanagaYukihiro OkiKoji AbeKazuhiro Miyoshi
    • Masato IwanagaYukihiro OkiKoji AbeKazuhiro Miyoshi
    • H01M6/04
    • H01M10/0567H01M4/131H01M4/485H01M4/505H01M4/525H01M10/0569H01M2300/004
    • A nonaqueous electrolyte secondary battery of the invention has a positive electrode having a positive electrode active material, a negative electrode, and a nonaqueous electrolyte having electrolyte salt in a nonaqueous solvent. The electric potential of the positive electrode active material is 4.4 to 4.6 V relative to lithium, and the nonaqueous electrolyte contains a compound expressed by structural formula (I) below. The quantity of compound added is preferably 0.1% to 2% by mass. Also, the positive electrode active material preferably comprises a mixture of a lithium-cobalt composite oxide which is LiCoO2 containing at least both zirconium and magnesium and a lithium-manganese-nickel composite oxide that has a layer structure and contains at least both manganese and nickel. Thanks to such structure, a nonaqueous electrolyte secondary battery can be provided that is charged to charging termination potential of 4.4 to 4.6 V relative to lithium and that has enhanced overcharging safety.[Chemical Formula 1]
    • 本发明的非水电解质二次电池具有正极,具有正极活性物质,负极和非水电解质,在非水溶剂中具有电解质盐。 正极活性物质的电位相对于锂为4.4〜4.6V,非水电解质含有下述结构式(I)表示的化合物。 化合物的添加量优选为0.1质量%〜2质量%。 此外,正极活性物质优选包含锂 - 钴复合氧化物的混合物,其为至少含有锆和镁的两种LiCoO 2和具有层结构并且至少包含锰和镍两者的锂锰镍复合氧化物的混合物 。 由于这样的结构,可以提供非水电解质二次电池,其相对于锂充电至4.4至4.6V的充电终止电位,并且具有增强的过充电安全性。 [化学式1]
    • 10. 发明申请
    • NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    • 非电解电解质二次电池
    • US20110223490A1
    • 2011-09-15
    • US13042543
    • 2011-03-08
    • Kazushi AndouKoji AbeKazuhiro MiyoshiMasahide Kondo
    • Kazushi AndouKoji AbeKazuhiro MiyoshiMasahide Kondo
    • H01M10/0564H01M10/056
    • H01M10/0567H01M4/364H01M4/505H01M4/525H01M10/052H01M10/0569H01M2300/0025H01M2300/0034H01M2300/0037H01M2300/004
    • In the nonaqueous electrolyte secondary battery, the positive electrode active material is composed of a mixture of a lithium-cobalt composite oxide containing at least both zirconium and magnesium, and a lithium-manganese-nickel composite oxide containing at least both manganese and nickel. The nonaqueous electrolyte includes fluoroethylene carbonate and dimethyl carbonate as a nonaqueous solvent and further includes an additive expressed by General Formula (1), which having a capability to form an SEI surface film, and a higher oxidation resistance than that of VC. Thus, the negative electrode active material is unlikely to react with the organic solvent. Therefore, decomposition of the organic solvent is suppressed. Thus the battery having a long cycling life even when it is charged at a positive electrode charging potential of 4.4 to 4.6 V based on lithium and having a high residual capacity after storage at high temperature in a charged state is provided.
    • 在非水电解质二次电池中,正极活性物质由至少含有锆和镁两者的锂 - 钴复合氧化物和至少含有锰和镍两者的锂 - 锰 - 镍复合氧化物的混合物构成。 非水电解质包括氟代碳酸亚乙酯和作为非水溶剂的碳酸二甲酯,并且还包括具有形成SEI表面膜的能力和比VC更高的抗氧化性的由通式(1)表示的添加剂。 因此,负极活性物质不可能与有机溶剂发生反应。 因此,有机溶剂的分解被抑制。 因此,电池具有长的循环寿命,即使在基于锂的正极充电电位为4.4〜4.6V下充电,并且在充电状态下在高温下保存后具有高剩余容量。