发明名称 |
Nonaqueous electrolyte secondary battery |
摘要 |
Provided is a nonaqueous electrolyte secondary battery in which a negative-electrode active material containing a graphite material and silicon or a silicon compound is used and which has an excellent charge-discharge cycle characteristic. In the nonaqueous electrolyte secondary battery, the negative-electrode active material used is an active material containing a graphite material and silicon or a silicon compound, and the negative electrode binder used comprises a polyimide and polyvinylpyrrolidone. |
申请公布号 |
US9023521(B2) |
申请公布日期 |
2015.05.05 |
申请号 |
US201213363607 |
申请日期 |
2012.02.01 |
申请人 |
SANYO Electric Co., Ltd. |
发明人 |
Tanaka Tadayoshi;Yokoi Mai;Minami Hiroshi;Imachi Naoki |
分类号 |
H01M4/587;H01M4/133;H01M4/134;H01M4/36;H01M4/38;H01M4/62;H01M4/02 |
主分类号 |
H01M4/587 |
代理机构 |
Westerman, Hattori, Daniels & Adrian, LLP |
代理人 |
Westerman, Hattori, Daniels & Adrian, LLP |
主权项 |
1. A nonaqueous electrolyte secondary battery including a negative electrode containing a negative-electrode active material and a negative electrode binder, a positive electrode, and a nonaqueous electrolyte,
wherein the negative-electrode active material used is an active material containing a graphite material and silicon or a silicon compound, and the negative electrode binder used comprises a polyimide and polyvinylpyrrolidone, wherein the content of polyvinylpyrrolidone is not less than 5.0 parts by mass and not more than 45.0 parts by mass per 100 parts by mass of the total of polyvinylpyrrolidone and the polyimide; the content of silicon or silicon compound is not less than 3.0 parts by mass and not more than 20.0 parts by mass per 100 parts by mass of a total of the graphite material and silicon or the silicon compound; and the content of polyvinylpyrrolidone in the negative electrode is more than 0 parts by mass and not more than 1 part by mass per 100 parts by mass of a total of the negative-electrode active material and the negative electrode binder. |
地址 |
Daito-shi JP |