| 摘要 |
PROBLEM TO BE SOLVED: To provide: an all-solid type secondary battery which is high in energy density and output density per unit battery weight; a composition for an electrode active material layer; an electrode sheet for a solid type secondary battery; and manufacturing method therefor.SOLUTION: An all-solid type secondary battery 10 comprises a positive electrode active material layer 4, a solid electrolyte layer 3, and a negative electrode active material layer 2 in this order. In the all-solid type secondary battery, the content of an inorganic solid electrolyte in at least one layer of the positive electrode active material layer 4 and the negative electrode active material layer 2 is 0-10 mass% to the total solid content; the solid electrolyte layer 3 includes a sulfide-based solid electrolyte; and at least one layer of the positive electrode active material layer 4 and the negative electrode active material layer 2 includes a binder. The negative electrode active material layer 2 includes a negative electrode active material expressed by the following formula (α): LiMOFormula (α) (where Mrepresents an element selected from a group including Al, Ga, Ti, Si and Fe; xα to zα represent composition ratios of the respective element; xα=0-4, yα=0.3-7, and zα=0.5-15). In addition, a composition for the electrode active material layers, an electrode sheet for the all-solid type secondary battery, and manufacturing methods therefor are provided.SELECTED DRAWING: Figure 1 |
