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    • 5. 发明申请
    • Non-aqueous electrolytic secondary battery
    • 非水电解二次电池
    • US20070148548A1
    • 2007-06-28
    • US11649322
    • 2007-01-02
    • Takashi SuzukiToshiyuki MiwaHiroto SagisakaYusuke TamuraKazuo TakadaYasuo Suzuki
    • Takashi SuzukiToshiyuki MiwaHiroto SagisakaYusuke TamuraKazuo TakadaYasuo Suzuki
    • H01M4/58
    • H01M4/587H01M10/052H01M10/0525
    • A non-aqueous electrolyte secondary battery includes a positive electrode 11 made of graphite powder and a negative electrode 13 made of lithium metal or a lithium-intercalatable/deintercalatable material. The positive electrode 11 and the negative electrode 13 are faced to each other with an electrolyte, containing a lithium salt, interposed in between. The positive electrode 11 has a carbon-derived absorption peak which appears within a range of 3200 gauss to 3400 gauss in an electron spin resonance method in which measurement is performed using an X band. A relative ratio (ΔH40K/ΔH296K) of the full width of half maximum intensity ΔH40K of the peak measured at a temperature of 40 K to the full width of half maximum intensity ΔH296K of the peak measured at a temperature of 296 K is 2.1 or more. Accordingly, it is possible to provide the non-aqueous electrolyte secondary battery which prevents degradation of the capacity in charge/discharge cycles after performing high temperature floating charge.
    • 非水电解质二次电池包括由石墨粉末制成的正极11和由锂金属制成的负极13或可锂可插拔/可切换材料。 正电极11和负电极13彼此间隔着含有锂盐的电解质。 正电极11具有在电子自旋共振法中出现在3200高斯至3400高斯范围内的碳衍生的吸收峰,其中使用X波段进行测量。 在40℃的温度下测得的峰的全部最大强度的三分之一高度40H的相对比(ΔH40K /ΔH296K) K在296K的温度下测得的峰的半峰强度的全宽度ΔH296K 为2.1以上。 因此,可以提供在进行高温浮动充电之后防止充放电循环中的容量降低的非水电解质二次电池。