发明名称 |
NEGATIVE ELECTRODE ACTIVE MATERIAL, METHOD FOR PRODUCING THE NEGATIVE ELECTRODE ACTIVE MATERIAL, AND LITHIUM ION SECONDARY BATTERY USING THE NEGATIVE ELECTRODE ACTIVE MATERIAL |
摘要 |
Disclosed is a negative electrode active material which has a high capacity and good cyclability. The negative electrode active material comprises nanosize carbon particles and nanosize tin dioxide particles that are supported in a high-dispersion state on the nanosize carbon particles. The negative electrode active material has a high discharge capacity because of the reversible progress of a conversion reaction of tin dioxide (SnO 2 +4Li + +4e - †’ 2Li 2 O+Sn) therein. In a charge-discharge cycle test within a voltage range of 0 to 2 V vs. an Li/Li + electrode, the negative electrode active material shows a discharge capacity retention rate of about 90% even after 500 charge-discharge cycles at the rate 1C, which indicates excellent cyclability. Therefore, the negative electrode active material can be suitably used in a lithium ion secondary battery and a hybrid capacitor. |
申请公布号 |
EP2485304(A4) |
申请公布日期 |
2014.05.21 |
申请号 |
EP20100820143 |
申请日期 |
2010.09.29 |
申请人 |
NIPPON CHEMI-CON CORPORATION |
发明人 |
NAOI, KATSUHIKO;NAOI, WAKO;ISHIMOTO, SHUICHI;TAMAMITSU, KENJI |
分类号 |
H01M4/48;B82Y30/00;B82Y40/00;B82Y99/00;C01G19/02;H01G9/00;H01G11/22;H01G11/24;H01G11/46;H01G11/86;H01M4/36;H01M10/052;H01M10/0566 |
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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