| 发明名称 | Cathode active material providing improved efficiency and energy density of electrode | ||
| 摘要 | Provided is a cathode active material having a composition represented by the following Formula I: LiFe(P1-XO4) (I) wherein a molar fraction (1−x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. Furthermore, a cathode active material, wherein a molar fraction (1−x) of phosphorus (P) is lower than 1, contains both Fe2+ and Fe3+, thus advantageously preventing structural deformation, improving ionic conductivity, exhibiting superior rate properties and inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries. | ||
| 申请公布号 | US8974957(B2) | 申请公布日期 | 2015.03.10 |
| 申请号 | US200913124421 | 申请日期 | 2009.10.22 |
| 申请人 | LG Chem, Ltd. | 发明人 | Choy Sanghoon;Lee Yong Tae;Park Hong-Kyu;Park Soo Min;Kil Hyo-shik;Park Cheol-Hee;Lee Ji Eun |
| 分类号 | H01M4/52;H01M4/525;H01M4/64;B82Y30/00;H01M4/58;C01B25/45;H01M4/136;H01M6/50 | 主分类号 | H01M4/52 |
| 代理机构 | Birch, Stewart, Kolasch & Birch, LLP | 代理人 | Birch, Stewart, Kolasch & Birch, LLP |
| 主权项 | 1. A cathode active material being entirely homogenous and having a composition represented by the following Formula I: LiFe(P(1-X)O4) (I) wherein a molar fraction (1−x) of phosphorus (P) is in the range of 0.910 to 0.999, and wherein the cathode active material comprises secondary particles with a mean particle diameter (D50) of 5 to 100 μm, said secondary particles are formed by aggregation of primary particles with a mean particle diameter (D50) of 50 to 550 nm, wherein the primary and secondary particles comprise the composition represented by Formula I, respectively, and the secondary particles have a porosity of 10% or more. | ||
| 地址 | Seoul KR | ||