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    • 2. 发明申请
    • METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY (AS AMENDED)
    • 生产非水电解质二次电池的方法(已修订)
    • US20140322579A1
    • 2014-10-30
    • US14360342
    • 2011-11-24
    • Toshihiko MitsuhashiYoshiyuki OzakiHideki SanoHajime Konishi
    • Toshihiko MitsuhashiYoshiyuki OzakiHideki SanoHajime Konishi
    • H01M4/62H01M4/04
    • H01M4/0402H01M2/362H01M4/0452H01M4/13H01M4/131H01M4/139H01M4/1391H01M4/366H01M4/628H01M10/0567H01M10/058H01M10/0585H01M10/0587Y02E60/122Y02P70/54Y10T29/49115
    • The present invention provides a method for producing a nonaqueous electrolyte secondary battery in which the drop in capacity retention rate is controlled by forming a coating in a more favorable state on the surface of the negative electrode active material. This production method comprises a step S10 of preparing a battery assembly in which an electrode assembly is housed within a battery case, the electrode assembly including a positive electrode produced by forming a positive electrode active material layer containing at least a positive electrode active material, and a negative electrode produced by forming a negative electrode active material layer containing at least a negative electrode active material; a first injection step S20 of injecting a nonaqueous electrolyte containing a specified additive into the battery case; a precharging step S30 of forming the additive-derived coating on the surface of the negative electrode active material; a second injection step S40 of injecting a nonaqueous electrolyte not containing an additive into the battery case; and a charge and discharge step S50 of charging and discharging the battery assembly to a predetermined charging and discharge voltage.
    • 本发明提供一种非水电解质二次电池的制造方法,其中通过在负极活性材料的表面上形成更好的状态的涂层来控制容量保持率的下降。 该制造方法包括制备电池组件的步骤S10,其中电极组件容纳在电池壳体内,该电极组件包括通过形成至少含有正极活性材料的正极活性物质层而形成的正极,以及 通过形成至少含有负极活性物质的负极活性物质层而形成的负极; 将含有特定添加剂的非水电解质注入电池壳体的第一注入步骤S20; 在负极活性物质的表面上形成添加剂衍生的涂层的预充电步骤S30; 将不含添加剂的非水电解质注入电池壳体的第二注入步骤S40; 以及将电池组件充放电至预定的充放电电压的充放电步骤S50。
    • 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。