| 发明名称 | Positive electrode for rechargeable lithium ion battery, rechargeable lithium ion battery, and battery module | ||
| 摘要 | A positive electrode for a rechargeable lithium ion battery includes a mixture layer including a positive-electrode active material, a conducting agent, and a binder and a collector having the mixture layer formed on the surface thereof. The positive-electrode active material is a composite oxide having an olivine structure expressed by a formula LiaMxPO4 (where M represents a transition metal including at least one of Fe and Mn and a and x satisfy 0<a≦1.1 and 0.9≦x≦1.1). The conducting agent includes fibrous carbon. A carbon coating layer is formed on the surface of the collector. A part of the positive-electrode active material and a part of the fibrous carbon enter pits formed in the carbon coating layer. | ||
| 申请公布号 | US8974971(B2) | 申请公布日期 | 2015.03.10 |
| 申请号 | US201213561870 | 申请日期 | 2012.07.30 |
| 申请人 | Hitachi, Ltd. | 发明人 | Yuasa Toyotaka;Kobayashi Mitsuru;Ogawa Sai;Oda Masanari;Kitagawa Kan |
| 分类号 | H01M4/64;H01M4/40;H01M4/505;H01M2/24 | 主分类号 | H01M4/64 |
| 代理机构 | Volpe and Koenig, P.C. | 代理人 | Volpe and Koenig, P.C. |
| 主权项 | 1. A positive electrode for a rechargeable lithium ion battery comprising: a mixture layer that includes a positive-electrode active material, a conducting agent, and a binder; and a collector that has the mixture layer formed on the surface thereof, wherein the positive-electrode active material is a composite oxide having an olivine structure expressed by a formula LiaMxPO4 (where M represents a transition metal including at least one of Fe and Mn and a and x satisfy 0<a≦1.1 and 0.9≦x≦1.1), wherein the conducting agent includes fibrous carbon, wherein a carbon coating layer is formed on the surface of the collector, wherein a part of the positive-electrode active material and a part of the fibrous carbon enter pits formed in the carbon coating layer, and wherein an average secondary particle diameter/average pit diameter ratio which is a ratio of the average secondary particle diameter and the average pit diameter of the pits is in the range of 0.1 to 0.5. | ||
| 地址 | Tokyo JP | ||