| 摘要 |
PURPOSE:To obtain a solid lithium secondary battery having an excellent charge-and-discharge repeated characteristic by using a niobium polysulfide as the positive active material and a reversible lithium-aluminum alloy as the negative electrode. CONSTITUTION:A positive mixture 1 is made of mixture consisting of 90- 70pts.wt. niobium trisulfide (NbS2.9) used as an active material and 10-30pts.wt. a lithium-ion-conducting solid electrolyte. It is formed by weighing the above mixture so that the quantity of Nb2.9 is about 3 millimols, then molding the mixture into a disk of 18mm. diameter and around 0.4mm. thickness at a pressure of 300MPa. A lithium-ion-conducting solid electrolyte layer 2 is formed by the use of a compound represented by nLiI.C5H5N.C4H9I. Here, 4-6 is preferably selected as n value. The solid electrolyte layer 2 is formed by molding the above mentioned electrolyte powder into a disk of 18mm. diameter and around 0.4mm. thickness at a pressure of 300MPa. A reversible negative lithium electrode 3 is a disk of 18mm. diameter and 0.5mm. thickness consisting of a lithium-aluminum alloy plate represented by LixAl. Here, value x can be varied within the range of 0.08-0.9 according to purpose. |
