| 摘要 |
The present invention relates to positive electrode active substance particles for lithium ion batteries, comprising lithium manganate particles comprising Li and Mn as main components and having a cubic spinel structure (Fd-3m), wherein primary particles of the positive electrode active substance have a dodecahedral or higher-polyhedral shape in which none of crystal planes equivalent to the (111) plane are located adjacent to each other, and flat crystal planes are crossed with each other to form a clear ridge, and an average primary particle diameter of the primary particles is not less than 1 μm and not more than 20 μm. The positive electrode active substance particles according to the present invention are excellent in packing property, load characteristics and high-temperature stability. |
| 主权项 |
1. Positive electrode active substance particles for lithium ion batteries, comprising lithium manganate particles comprising (i) a lithium manganate and also separately (ii) a crystal plane growth inhibitor, wherein
the lithium manganate comprises Li and Mn as main components and having a cubic spinel structure with a space group: Fd-3m, the lithium manganate is represented by a formula of LiMn2O4, and a portion of Mn within the lithium manganate may be substituted with another metal element of one or more anions selected from the group consisting of Li, Fe, Mn, Ni, Mg, Zn, Al, Co, Cr, Si, Ti, Sn, V and Sb, the crystal plane growth inhibitor comprises Al and/or P, primary particles of the positive electrode active substance have a dodecahedral or higher-polyhedral shape in which none of crystal planes equivalent to a plane are located adjacent to each other, and flat crystal planes are crossed with each other to form a clear ridge, and an average primary particle diameter of the primary particles is not less than 1 μm and not more than 20 μm. |
