发明名称 |
Graphite powders suited for negative electrode material of lithium ion secondary battery |
摘要 |
A graphite powder suitable for a negative electrode material of a lithium ion secondary battery which assures a high discharging capacity not lower than 320 mAh/g is to be manufactured at a lower cost. Specifically, a graphite powder containing 0.01 to 5.0 wt% of boron and having a looped closure structure at an end of a graphite c-planar layer on the surface of a powder, with the density of the interstitial planar sections between neighboring closure structures being not less than 100/ mu m and not more than 1500/ mu m, and with d002 being preferably not larger than 3.3650 ANGSTROM , is manufactured by (1) heat-treating a carbon material pulverized at an elevated speed before or after carbonization for graphization at temperature exceeding 1500 DEG C or by (2) heat-treating the carbon material pulverized before or after carbonization at a temperature exceeding 1500 DEG C for graphization and subsequently further heat-treating the graphized material at a temperature exceeding a temperature of the oxidating heat treatment and the heat treatment in the inert gas. <IMAGE> |
申请公布号 |
EP0955684(A1) |
申请公布日期 |
1999.11.10 |
申请号 |
EP19990107835 |
申请日期 |
1999.04.20 |
申请人 |
SONY CORPORATION |
发明人 |
MORIGUCHI, KOJI;YONEMURA, MITSUHARU;KAMEI, KAZUHITO;ABE, MASARU;KAMINAKA, HIDEYA;NEGI, NORIYUKI;OMARU, ATSUO;NAGAMINE, MASAYUKI |
分类号 |
H01M10/05;C01B31/04;H01M4/133;H01M4/58;H01M4/587;H01M10/0525;H01M10/36 |
主分类号 |
H01M10/05 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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