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    • 4. 发明授权
    • Anode material for lithium ion secondary battery
    • 锂离子二次电池用阳极材料
    • US07816037B2
    • 2010-10-19
    • US10501333
    • 2003-01-24
    • Naoto OhtaKatsuhide NagaokaKazuhito HoshiHidehiko NozakiTetsuro TojoToshiaki Sogabe
    • Naoto OhtaKatsuhide NagaokaKazuhito HoshiHidehiko NozakiTetsuro TojoToshiaki Sogabe
    • H01M4/58
    • H01M4/133H01M4/366H01M4/587H01M10/0525H01M2004/021Y10T428/2998
    • The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material, which is coated thermoplastic resin of a carbonization yield of ≦20 wt % in a proportion of ≦10 parts by weight the carbonized material per 100 parts by weight graphite powder. Coating with thermoplastic resin increases the accumulative pore volume by ≦5%, relative to the uncoated powder, and results in pore sizes of 0.012-40 μm via mercury porosimeter method. Calculated with the BJH method as viewed from desorption isotherm, the coated graphite powder has a mesopore volume ≦0.01 cc/g or ≦60% of the pore volume of the uncoated graphite powder. This coated powder also has an average particle size ranging from 10-50 μm measured by a laser-scattering-particle-size-distribution measuring device, and a standard deviation to the average particle size (σ/D) ratio of ≦0.02.
    • 本发明提供一种使用涂覆石墨粉末作为原料的锂离子二次电池的负极材料,其为碳化产率为< nEE的涂层热塑性树脂;以< NEE为20重量%; 10重量份碳化材料 100重量份石墨粉。 用热塑性树脂涂层,相对于未涂覆的粉末,累积孔体积增加了±10%; 5%,通过汞孔率计法得到0.012-40μm的孔径。 用解吸等温线观察的BJH方法计算,涂覆的石墨粉末的中孔体积为0.01cc / g或者nlE;未涂覆石墨粉末的孔体积的60%。 该涂覆粉末还具有通过激光散射 - 粒度分布测量装置测量的10-50μm的平均粒径,并且与平均粒径(& Gr / D)比率&n1E的标准偏差为0.02 。