| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a conventional lithium-sulfur organic electrolyte battery which needs a conducting agent to be mixed therein because of positive electrode's sulfur making an insulator that a lithium polysulfide (LiS, where 4≤n≤8) is dissolved in an organic electrolytic solution and thus reversible charge/discharge cannot be performed or the decline in capacity is caused owing to a shuttle effect involved with a negative electrode, and the problem of a water-soluble lithium sulfur electrochemical battery having a low capacity, thereby providing a lithium-sulfur battery which can be expected of the achievement of a high capacity.SOLUTION: A lithium-water-soluble sulfur battery comprises: a negative electrode including a lithium-containing material; an electrolytic solution for the negative electrode; a solid electrolytic body separating the negative electrode and a positive electrode from each other and allowing only a lithium ion to pass therethrough; a water-soluble electrolytic solution for the positive electrode, which includes a lithium salt of polysulfide; and a positive electrode current collecting electrode. In at least part of a time of discharge, solid sulfur S in contact with the water-soluble electrolytic solution is present on the positive electrode side.SELECTED DRAWING: Figure 8 |
