| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode active material in which both of charge and discharge capacity density and thermal stability can be improved, a manufacturing method, and a non-aqueous electrolyte secondary battery using the positive electrode active material. <P>SOLUTION: By mixing lithium nickelate and less than 5 wt.% of lithium olivinate by a ball mill, the positive electrode active material is fabricated (Mechanical Milling Treatment). By carrying out the mechanical milling treatment, the lithium olivinate is arranged so as to be partially contacted with a surface of the lithium nickelate in the positive electrode active material. The lithium nickelate is expressed by Li<SB>y</SB>Ni<SB>1-z</SB>M<SB>z</SB>O<SB>2</SB>, and satisfies 0.05≤y≤1.2 and 0≤z≤0.5. As the M, cobalt (Co), for example, is preferably used. Moreover, lithium olivinate is expressed by Li<SB>x</SB>M 'PO<SB>4</SB>, and satisfies 0.05≤x≤1.2. As the M', Fe (iron), for example, is preferably used. <P>COPYRIGHT: (C)2008,JPO&INPIT |
