| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrode active material having a high conductivity and capable of developing an excellent battery characteristics (charge and discharge characteristics etc.) and its manufacturing method, and a secondary battery using this electrode active material. <P>SOLUTION: This is an electrode active material having as a principal component lithium-contained iron vanadium phosphate glass and glass ceramics as expressed by a general formula : (Li<SB>2</SB>O)<SB>a</SB>(Fe<SB>2</SB>O<SB>3</SB>)<SB>b</SB>(V<SB>2</SB>O<SB>5</SB>)<SB>c</SB>(P<SB>2</SB>O<SB>5</SB>)<SB>d</SB>(0≤a≤0.5, 0≤b≤0.5, 0≤c≤0.5, 0≤d≤0.5). The manufacturing method of the electrode active material is provided in which a mixture of a prescribed mole ratio of compounds including four elements of Li, Fe, V, P is heated and melted, quenched and solidified, and by adding vanadium to a lithium-contained iron phosphate complex, a mixed valence state is introduced and, by increasing carrier electrons, the conductivity of the electrode active material is improved. The secondary battery having the electrode active material as obtained by the above as a constituent is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT |
