发明名称 |
SECONDARY BATTERY |
摘要 |
A porosity X of a positive electrode mixture layer 223 of a secondary battery 100 is 30(%)≦̸X. A mass ratio α of a positive electrode active material 610 in the positive electrode mixture layer 223 is 0.84≦̸α≦̸0.925 and a mass ratio &bgr; of a conductive material 620 in the positive electrode mixture layer 223 is 0.06≦̸&bgr;≦̸0.12. In the secondary battery 100, an index Y worked out from an expression below is 30 (mL/100 g)≦̸Y≦̸89 (mL/100 g). The index Y is given by the expression below, Y=A×α+B×&bgr;; where A is a DBP absorption number (mL/100 g) in the positive electrode active material 610; α is the mass ratio of the positive electrode active material 610 in the positive electrode mixture layer 223; B is a DBP absorption number (mL/100 g) of the conductive material 620; and &bgr; is the mass ratio of the conductive material 620 in the positive electrode mixture layer 223. |
申请公布号 |
KR20130070651(A) |
申请公布日期 |
2013.06.27 |
申请号 |
KR20137012215 |
申请日期 |
2010.10.15 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
NAGAI HIROKI;MORITA MASAHIRO;IWAO TAKASHI |
分类号 |
H01M4/13;H01M4/139;H01M4/505;H01M10/04 |
主分类号 |
H01M4/13 |
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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