发明名称 |
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY WHICH COMPRISES THE NEGATIVE ELECTRODE MATERIAL, AND LITHIUM ION SECONDARY BATTERY |
摘要 |
Disclosed are: a negative electrode material for a lithium ion secondary battery, which enables the production of one having a smaller irreversible capacity. That is a negative electrode material for a lithium ion secondary battery having a carbon layer formed on a surface of a carbon material as a core, wherein (A) a carbon (002) plane has a plane distance of 3.40 to 3.70 Å (by an XRD measurement), (B) a content ratio of the carbon layer to the carbon material is 0.005 to 0.1, (C) a specific surface area is 0.5 to 10.0 m 2 /g (by a nitrogen adsorption measurement at 77 K), and (D) a specific surface area Y (by carbon dioxide adsorption at 273 K) and a content ratio X of the carbon layer to the carbon material meet the requirement represented by a formula (I): 0 < Y < AX + 2.5 [A = 100]. |
申请公布号 |
EP2541657(A1) |
申请公布日期 |
2013.01.02 |
申请号 |
EP20110747404 |
申请日期 |
2011.02.23 |
申请人 |
HITACHI CHEMICAL COMPANY, LTD. |
发明人 |
OKABE, KEIJI;ISHII, YOSHITO;IDA, YURIKO |
分类号 |
H01M4/587;C01B31/02;H01M4/02;H01M4/133;H01M4/36;H01M10/0525 |
主分类号 |
H01M4/587 |
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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