| 摘要 |
PURPOSE:To improve the discharge characteristic of a nonaqueous electrolyte battery by suppressing the increase in the internal resistance during the last stage of electric discharge by adding antimony sulfide to make the positive electrode containing iron disulfide as an active material. CONSTITUTION:After 80pts.wt. of commercial iron disulfide is combined with 10pts.wt. of acetylene black and graphite used as conductive agents and 4pts.wt. of a fluorine resin powder used as a binding agent, the mixture is thoroughly mixed to prepare a positive mixture which is then pressed and molded to form a pellet. The thus formed pellet is then sintered at 200-300 deg.C to make a positive electrode 1. A negative plate 4 is made by rolling a lithium plate into a thickness of 0.6mm. and punching the rolled plate into a diameter of 15.0mm.. Electrolyte is prepared by dissolving 1mol/l of lithium borofluoride into a mixture solvent consisting of propylene carbonate and 1,2 dimethoxyethane. The figure indicates the relationship among the quantity of antimony sulfide added, the utilization rate of the positive active material and the discharge capacity of the battery. As seen from the figure, it is preferable that the quantity of anitmony sulfide added be about 1.0-15.0wt% of the positive electrode. |
