| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a complex metal oxide with which battery performance of a sodium secondary battery is improved, the production method of the complex metal oxide, a positive electrode active material constituted of the complex metal oxide, a positive electrode formed by using the positive electrode active material, and the sodium secondary battery including the positive electrode. <P>SOLUTION: A complex metal oxide represented by predetermined general formula and constituted of an oxide with a P2 structure is used, and a positive electrode active material is produced by using the complex metal oxide, a positive electrode is produced by using the positive electrode active material, and a sodium secondary battery is produced by using the positive electrode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
