| 摘要 |
PURPOSE:To increase the electron conductivity and the consumption rate of positive active material while Li<+> conductivity is maintained, by forming positive active material of an Li solid battery with a solid solution consisting of PbI2 and one or more of elements selected from Bi, Sb, Tl, In, and Ga. CONSTITUTION:In an Li solid battery in which positive active material, electrolyte, and negative active material of Li-metal are laminated, the positive active material is formed of solid solution in which one or more of metals selected from Bi, Sb, Tl, In, and Ga are solid-dissolved in crystal lattice of PbI2 as a resistive material. The content of these elements in the solid solution is assigned to 1ppm or more in atomic concentration. Because of the presence of a trace amount of metals in PbI2 in the form of solid solution, the electron conductivity of the positive active material is improved without preventing the feed of Li<+> to PbI2, and the energy density or output density of a battery can be increased entirely. |
