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    • 3. 发明授权
    • Lithium-ion secondary battery
    • 锂离子二次电池
    • US09553299B2
    • 2017-01-24
    • US14235471
    • 2011-07-29
    • Koji TakahataHideki Sano
    • Koji TakahataHideki Sano
    • H01M4/587H01M4/04H01M4/133H01M4/1393H01M4/36H01M10/0525
    • H01M4/0404H01M4/133H01M4/1393H01M4/364H01M4/587H01M10/0525Y02E60/122Y02P70/54Y02T10/7011
    • A negative electrode sheet of a lithium-ion secondary battery has a negative electrode current collector and a negative electrode active material layer on the negative electrode current collector. The negative electrode active material layer contains flake graphite particles and has a first region neighboring the negative electrode current collector and a second region neighboring a surface side that are different in perpendicularity of the graphite particles. The perpendicularity of the graphite particles is defined as (m1/m2), where, when the inclination θn of each of the graphite particles is specified relative to a surface of the negative electrode current collector, m1 is the number of the graphite particles having an inclination θn of 60°≦θn≦90° and m2 is the number of the graphite particles having an inclination θn of 0°≦θn≦30°.
    • 锂离子二次电池的负极片在负极集电体上具有负极集电体和负极活性物质层。 负极活性物质层含有片状石墨粒子,具有与负极集电体相邻的第一区域和与石墨粒子的垂直度不同的与表面侧相邻的第二区域。 石墨颗粒的垂直度定义为(m1 / m2),其中当相对于负极集电体的表面规定每个石墨颗粒的倾斜度θn时,m1是具有 倾角θn为60°≤θn≤90°,m2为倾斜度θn为0°≤θn≤30°的石墨颗粒的数量。