| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a positive electrode active material for a lithium ion battery, containing an olivine-type silicate compound composed of primary particles and secondary particles having a specific size and shape and exhibiting an excellent battery physical property, and a lithium ion battery obtained from the same. <P>SOLUTION: A positive electrode active material for a lithium ion battery contains an olivine-type silicate compound represented by Li<SB POS="POST">2</SB>MSiO<SB POS="POST">4</SB>(where M represents one or two kinds or more selected from Fe, Ni, Co, and Mn.) The olivine-type silicate compound has secondary particles having an average grain size of 1-100μm, and the secondary particles being an aggregation of spherical primary particles having an average grain size of 20-100 nm. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
