发明名称 |
LITHIUM ION SECONDARY BATTERY |
摘要 |
The present invention intends to provide a lithium ion secondary battery that has a high capacity and excellent charge/discharge cycle characteristics. A lithium ion secondary battery includes: a positive electrode; and a negative electrode, wherein the negative electrode includes a negative electrode active material of which initial charge capacity is 1800 mAh/g or more and initial efficiency (initial discharge capacity/initial charge capacity) is 0.70 to 0.85, the positive electrode includes a positive electrode active material of which initial charge capacity is 160 mAh/g or more and initial efficiency (initial discharge capacity/initial charge capacity) is 0.75 to 0.90, and an initial discharge capacity ratio of the negative electrode and the positive electrode (initial discharge capacity of the negative electrode/initial discharge capacity of the positive electrode) is 0.90 to 1.30.
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申请公布号 |
US2013309573(A1) |
申请公布日期 |
2013.11.21 |
申请号 |
US201313892583 |
申请日期 |
2013.05.13 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
OHBA TOSHIO;MIYAWAKI SATORU;IKEDA TATSUHIKO |
分类号 |
H01M4/48 |
主分类号 |
H01M4/48 |
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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