| 摘要 |
PROBLEM TO BE SOLVED: To provide an all-solid secondary battery which enhances reduction of discharge capacity in the case where high-rate charge/discharge is performed.SOLUTION: There is provided a laminate (10) for all-solid secondary battery which comprises a negative electrode collector (6) and negative electrode active material layers (4 and 5) that are formed on the negative electrode collector. Here, the negative electrode active material layers include the first negative electrode active material layer (5) and the second negative electrode active material layer (4) in this order from a side of the negative electrode collector. A content of a carbon-based negative electrode active material in the first negative electrode active material layer is greater than that in the second negative electrode active material layer. A content of an Si-based negative electrode active material in the second negative electrode active material layer is greater than that in first negative electrode active material layer. Thickness of the second negative electrode active material layer is 6% or more and 29% or less of thickness of the negative electrode active material layers. The Si-based negative electrode active material that is contained in the negative electrode active material layers is 5 wt% or more and 25 wt% or less in a total of all the negative electrode active materials that are contained in the negative electrode active material layers.SELECTED DRAWING: Figure 1 |
