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    • 6. 发明授权
    • Non-aqueous secondary battery
    • 非水二次电池
    • US08481212B2
    • 2013-07-09
    • US13511084
    • 2011-09-12
    • Naokage TanakaAkira InabaMasayuki YamadaMasayuki Yoshiya
    • Naokage TanakaAkira InabaMasayuki YamadaMasayuki Yoshiya
    • H01M4/13
    • H01M4/131C01B33/113H01M4/133H01M4/366H01M4/483H01M4/587H01M10/052Y02E60/122Y02T10/7011
    • The non-aqueous secondary battery of the present invention includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator, the negative electrode contains a negative electrode active material containing a graphitic carbon material and a composite in which a carbon coating layer is formed on a surface of a core material containing Si and O as constituent elements, the composite has a carbon content of 10 to 30 mass %, the composite has an intensity ratio I510/I1343 of a peak intensity I510 at 510 cm−1 derived from Si to a peak intensity I1343 at 1343 cm−1 derived from carbon of 0.25 or less when a Raman spectrum of the composite is measured at a laser wavelength of 532 nm, and the half-width of the (111) diffraction peak of Si is less than 3.0° when the crystallite size of an Si phase contained in the core material is measured by X-ray diffractometry using CuKα radiation.
    • 本发明的非水系二次电池包括正极,负极,非水电解质和隔膜,所述负极含有含有石墨碳材料的负极活性物质和碳 在含有Si和O作为构成元素的芯材的表面上形成涂层,该复合材料的碳含量为10〜30质量%,复合材料的强度比I510 / I1343为510cm -1的峰强度I510, 1,衍射自Si的峰值强度I1343为1343cm -1,当在532nm的激光波长下测量复合物的拉曼光谱时,(111)衍射峰的半值 当通过使用CuKalpha辐射的X射线衍射法测量芯材中包含的Si相的微晶尺寸时,Si的含量小于3.0°。