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    • 10. 发明申请
    • NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    • 非水电解质二次电池
    • US20110151338A1
    • 2011-06-23
    • US13059770
    • 2009-08-04
    • Hidekazu YamamotoAtsushi FukuiTaizou SunanoMaruo Kamino
    • Hidekazu YamamotoAtsushi FukuiTaizou SunanoMaruo Kamino
    • H01M10/056
    • H01M10/052H01M4/134H01M4/38H01M4/386H01M4/622H01M6/164H01M10/0567H01M10/0569H01M2300/0034Y02E60/122
    • The present invention is made to improve charge-discharge cycle performances under high temperature environment in a non-aqueous electrolyte secondary battery using a negative electrode containing a negative electrode active material of particulate silicon and/or silicon alloy and a binding agent.A non-aqueous electrolyte secondary battery according to the present invention includes a positive electrode 11, a negative electrode 12, a separator 13, and a non-aqueous electrolyte, wherein the negative electrode includes a negative electrode active material containing particulate silicon and/or silicon alloy and a binding agent, and the non-aqueous electrolyte contains fluorinated cyclic carbonate and a prescribed diisocyanate compound, and when Li storage volume per unit area of the negative electrode of the non-aqueous electrolyte secondary battery under charging condition is determined as A and the theoretical maximum Li storage volume per unit area of the negative electrode is determined as B, a utilizing rate (%) of negative electrode which is expressed by (A/B)×100 is 45% or less.
    • 本发明的目的在于提高使用含有硅和/或硅合金的负极活性物质的负极和粘合剂的非水电解质二次电池在高温环境下的充放电循环性能。 根据本发明的非水电解质二次电池包括正极11,负极12,隔膜13和非水电解质,其中所述负极包括含有颗粒状硅的负极活性物质和/或 硅合金和粘合剂,非水电解质含有氟化环状碳酸酯和规定的二异氰酸酯化合物,并且当非水电解质二次电池的负极在充电条件下的每单位面积的Li储存容积确定为A 将负极单位面积的理论最大Li储存容量确定为B,由(A / B)×100表示​​的负极的利用率(%)为45%以下。