All-solid-state batteries

Claims

1. A power generation element in which a positive electrode layer, a solid electrolyte layer, and a negative electrode layer are stacked in this order along the first direction, A positive electrode current collector in contact with the positive electrode layer, A solid-state battery comprising a negative electrode current collector in contact with the negative electrode layer, The positive electrode layer is in contact with the solid electrolyte layer and includes a side surface that slopes toward the center of the positive electrode layer as it approaches the negative electrode current collector from the positive electrode current collector. The all-solid-state battery is provided on the positive electrode current collector and is in contact with and covering the side surface, and further comprises a non-Li ion conductive coating portion, An all-solid-state battery in which the thickness of the covering portion in the first direction is thinner than the thickness of the power generation element in the first direction.

2. In the all-solid-state battery described in claim 1, The positive electrode layer is The first end face that contacts the positive electrode current collector, Including a second end face located opposite to the first end face, The aforementioned covering portion is The third end surface that contacts the positive electrode current collector, Including a fourth end face located opposite to the third end face, The solid electrolyte layer covers the second end face and the fourth end face of the all-solid-state battery.

3. In the all-solid-state battery according to claim 2, The thickness of the coating portion in the first direction is greater than the thickness of the positive electrode layer in the first direction. The solid electrolyte layer is The first portion in contact with the second end face, Including the second portion in contact with the fourth end face, A solid-state battery in which the thickness of the second portion in the first direction is thinner than the thickness of the second portion in the first direction.

4. In the all-solid-state battery according to claim 2, The aforementioned covering portion is A first inner surface that is in contact with the aforementioned side surface and is inclined to correspond to the inclination of the aforementioned side surface, The first inner surface includes a second inner surface connected from the solid electrolyte layer side and separated from the side surface, The solid electrolyte layer includes an intervening portion between the side surface and the second inner surface, making it an all-solid-state battery.

5. In the all-solid-state battery according to claim 4, A solid-state battery in which the edge of the positive electrode layer is located outside the edge of the second inner surface of the fourth end face in a plan view from the first direction.

6. In the all-solid-state battery described in claim 1, The aforementioned covering portion is The third portion in contact with the aforementioned side surface, A fourth portion located outside the third portion and in contact with the positive electrode current collector, An all-solid-state battery in which the density of the fourth portion is higher than the density of the third portion.

7. In the all-solid-state battery described in claim 1, The all-solid-state battery further comprises a mixed portion located between the positive electrode layer and the coating portion, in which the material constituting the positive electrode layer and the material constituting the coating portion are mixed.

8. In the all-solid-state battery according to any one of claims 1 to 7, The covering portion is an all-solid-state battery that includes an inner surface that is in surface contact with the side surface.

9. In the all-solid-state battery according to any one of claims 1 to 8, The covering portion includes an inner surface that contacts the side surface and is inclined to correspond to the slope of the side surface, making it an all-solid-state battery.