| 发明名称 | Lithium-ion secondary battery | ||
| 摘要 | A negative electrode sheet of a lithium-ion secondary battery has a negative electrode current collector and a negative electrode active material layer on the negative electrode current collector. The negative electrode active material layer contains flake graphite particles and has a first region neighboring the negative electrode current collector and a second region neighboring a surface side that are different in perpendicularity of the graphite particles. The perpendicularity of the graphite particles is defined as (m1/m2), where, when the inclination θn of each of the graphite particles is specified relative to a surface of the negative electrode current collector, m1 is the number of the graphite particles having an inclination θn of 60°≦θn≦90° and m2 is the number of the graphite particles having an inclination θn of 0°≦θn≦30°. | ||
| 申请公布号 | US9553299(B2) | 申请公布日期 | 2017.01.24 |
| 申请号 | US201114235471 | 申请日期 | 2011.07.29 |
| 申请人 | Toyota Jidosha Kabushiki Kaisha | 发明人 | Takahata Koji;Sano Hideki |
| 分类号 | H01M4/587;H01M4/04;H01M4/133;H01M4/1393;H01M4/36;H01M10/0525 | 主分类号 | H01M4/587 |
| 代理机构 | Finnegan, Henderson, Farabow, Garrett & Dunner, LLP | 代理人 | Finnegan, Henderson, Farabow, Garrett & Dunner, LLP |
| 主权项 | 1. A lithium-ion secondary battery comprising: a negative electrode current collector; and a negative electrode active material layer formed on the negative electrode current collector, wherein the negative electrode active material layer contains flake graphite particles and has a first region neighboring the negative electrode current collector and a second region neighboring a surface side thereof, the first region and the second region differing in perpendicularity of the graphite particles. | ||
| 地址 | Toyota-shi, Aichi JP | ||