| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium-ion secondary battery usable at a charge and discharge rate of a high energy density and a wide range, and a positive electrode suitable for that purpose. <P>SOLUTION: This is the positive electrode for the lithium-ion secondary battery containing a compound oxide of a spinel structure which is shown by Li [M<SP>1</SP><SB>m</SB>M<SP>2</SP><SB>2-m</SB>] O4 (M<SP>1</SP>is at least one kind selected from a group composed of Ni, Cr, Fe, Co, and Cu, and 0.4<m<1.1, M<SP>2</SP>is at least one kind selected from a group composed of Mn, Ti, and Si), and which releases and stores Li at an electric potential of 4.5 V or more for Li, and the compound oxide of a layered structure which is shown by Li[X<SB>x</SB>Z<SB>z</SB>Mn<SB>1-x-z</SB>]O<SB>2</SB>(X is at least one kind selected from a group composed of Ni, Cr, Fe, Co, and Cu, Z is at least one kind selected from a group composed of Li, Al, and Mg, 0.1≤x≤0.5, 0≤z<0.3, 0.1≤x+z≤0.5). This is the lithium-ion secondary battery having this positive electrode. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
