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    • 4. 发明申请
    • Lithium secondary battery, negative electrode therefor, and method of their manufacture
    • 锂二次电池及其负极及其制造方法
    • US20070072077A1
    • 2007-03-29
    • US11527713
    • 2006-09-27
    • Yasuyuki KusumotoNobuhiro Sakitani
    • Yasuyuki KusumotoNobuhiro Sakitani
    • H01M4/38H01M4/62
    • H01M10/052H01M4/136H01M4/621H01M4/623Y02T10/7011Y10T29/49108
    • A practical lithium secondary battery is provided having a greater battery capacity than in the case of using particulate graphite as its negative electrode active material but a less electrical resistance of its negative electrode mixture layer than in the case of using particulate Si as the negative electrode active material. The lithium secondary battery also exhibits good charge-discharge cycle performance. The lithium secondary battery is furnished with a negative electrode having negative electrode current collector and a negative electrode mixture layer that contains a Sn-based particulate negative electrode active material and a negative electrode binder. The negative electrode binder is melt-bonded to the Sn-based particulate negative electrode active material and/or the negative electrode current collector, and the Sn-based particulate negative electrode active material is made of an intermetallic compound represented as SnXM1-X, where 1>X≧1/2 and M is Mn, Fe, Co, or Ni.
    • 提供了一种实用的锂二次电池,其具有比在使用颗粒状石墨作为其负极活性物质时更大的电池容量,但是与使用颗粒状Si作为负极活性物质相比,其负极混合物层的电阻较小 材料。 锂二次电池也具有良好的充放电循环性能。 锂二次电池配备有负极集电体和含有Sn系粒子状负极活性物质和负极活性物质的负极混合层的负极。 负极粘合剂与Sn系粒子状负极活性物质和/或负极集电体熔融结合,Sn系粒子状负极活性物质由Sn X系金属间化合物 M 1-X 1,其中1> X> = 1/2,M是Mn,Fe,Co或Ni。