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1. 发明申请

US20050158550A1 Negative electrode material for lithium ion secondary battery 有权
标题翻译：锂离子二次电池用负极材料
公开(公告)号：US20050158550A1
公开(公告)日：2005-07-21
申请号：US10501333
申请日：2003-01-24
申请人： Naoto Ohta , Katsuhide Nagaoka , Kazuhito Hoshi , Hidehiko Nozaki , Tatsuro Tojo , Toshiaki Sogabe
发明人： Naoto Ohta , Katsuhide Nagaoka , Kazuhito Hoshi , Hidehiko Nozaki , Tatsuro Tojo , Toshiaki Sogabe
IPC分类号： H01M4/36 , B32B27/00 , H01M4/133 , H01M4/583 , H01M4/587 , H01M10/0525 , H01M4/58
CPC分类号： H01M4/133 , H01M4/366 , H01M4/587 , H01M10/0525 , H01M2004/021 , Y10T428/2998
摘要： The invention provides an anode material for lithium ion secondary battery using a coated graphite powder as a raw material. The coated graphite powder is coated with carbonized material of thermoplastic resin of a carbonization yield of not more than 20 wt % in a proportion of not more than 10 parts by weight the carbonized material per 100 parts by weight graphite powder. The graphite powder as coated with thermoplastic resin increases 5% or more in accumulative pore volume of the graphite powder having a pore size of 0.012 μm to 40 μm as measured by a mercury porosimeter method, as compared with the graphite powder before coated with the thermoplastic resin. The coated graphite powder has a mesopore volume defined by IUPAC of 0.01 cc/g or less as calculated with the BJH method as viewed from desorption isotherm, which is also equal to 60% or less of the pore volume of the graphite powder before coated with the thermoplastic resin, an average particle size ranging from 10 μm to 50 μm, as measured by a laser-scattering-particle-size-distribution measuring device, and a ratio of standard deviation to the average particle size (σ/D) of 0.02 or less.
摘要翻译：本发明提供一种使用涂覆石墨粉作为原料的锂离子二次电池的负极材料。涂覆的石墨粉末以每100重量份石墨粉末碳化材料不超过10重量份的比例涂覆碳化产率为20重量％以下的热塑性树脂碳化材料。与热塑性树脂一起涂覆的石墨粉末，与用热塑性树脂涂覆之前的石墨粉末相比，通过水银孔率计法测量，孔径为0.012μm至40μm的石墨粉末的累积孔体积增加5％或更多树脂。涂覆的石墨粉末具有由解吸等温线观察时用BJH法计算的0.01cc / g以下的由IUPAC定义的中孔体积，其等于涂布前的石墨粉末的孔体积的60％以下热塑性树脂，通过激光散射 - 粒度分布测量装置测量的平均粒度为10〜50μm，标准偏差与平均粒径（sigma / D）的比值为0.02 或更少。

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