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    • 10. 发明授权
    • Carbonaceous electrode material for secondary battery and process for
production thereof
    • 二次电池用碳质电极材料及其制造方法
    • US5527643A
    • 1996-06-18
    • US295066
    • 1994-08-26
    • Naohiro SonobeTakao IwasakiJiro Masuko
    • Naohiro SonobeTakao IwasakiJiro Masuko
    • H01M4/58C01B31/04C04B35/00H01B1/04
    • H01M4/583
    • A non-aqueous solvent-type secondary battery having a large charge-discharge capacity and exhibiting a high utilization rate of an active substance, such as lithium, and an excellent charge-discharge cycle characteristic, can be constituted by using a carbonaceous electrode material having a specific microtexture. The carbonaceous electrode material is characterized by having an average (002)-plane spacing d.sub.002 of 0.336-0.375 nm and a crystallite size in c-axis direction Lc.sub.(002) of at most 50 nm, respectively, as measured by X-ray diffraction method, and an optically anisotropic texture showing a fine mosaic texture when observed through a polarizing microscope. The carbonaceous material may suitably be produced through a process including the steps of: crosslinking a tar or pitch of a petroleum or coal origin, and carbonizing the crosslinked tar or pitch at a temperature of at least 800.degree. C. under a reduced pressure or in an inert gas atmosphere.
    • 可以通过使用具有充电 - 放电容量大且充电 - 放电循环特性优异的锂的活性物质的高利用率和非常好的充放电循环特性的非水溶剂型二次电池, 一个特定的微观结构。 碳质电极材料的特征在于,通过X射线衍射测定,其平均(002)面间距d002为0.336〜0.375nm,c轴方向Lc(002)的微晶尺寸分别为50nm以下 方法和通过偏光显微镜观察时显示出细小的马赛克纹理的光学各向异性织构。 含碳材料可以适当地通过包括以下步骤的方法生产:包括以下步骤:交联石油或煤原料的焦油或沥青,并且在减压下或在减压下在至少800℃的温度下将交联焦油或沥青碳化 惰性气体气氛。