| 摘要 |
PURPOSE:To increase the discharge capacity and stabilize the discharge voltage by setting the void ratio of a carbonaceous porous body positive electrode 4 to a specified value and forming a conductive layer mainly containing carbon, nickel fine powders and water glass on the surface of a positive collector. CONSTITUTION:When the void ratio of a carbonaceous porous body positive electrode 4 is low and the density of carbon particles is high, the contact with a positive collector pole 8 with carbon particles of the positive electrode 4 is improved, but as the impregnation of thionyl chloride which is a positive active material and electrolyte into the positive electrode is insufficient, the discharge reaction is collected on the positive electrode surface near a negative electrode 2, solid materials such as lithium chloride and ions which are discharge reaction products are accumulated on the positive electrode surface to make it possible to obtain a sufficient discharge capacity in the positive electrode inner part. To solve this problem, the void ratio of the carbonaceous porous body positive electrode 4 is made 80-90%, and a conductive layer having carbon and nickel fine powders as conductive materials and water glass as a binding material is formed on the surface of the positive collector 8 Hence, the discharge voltage is increased and stabilized, and a battery having a large discharge capacity can be obtained. |
