All-solid-state battery

An all-solid-state battery, comprising:

• a cell stack including a solid electrolyte layer, and a positive electrode layer and a negative electrode layer with the solid electrolyte layer disposed therebetween;
• an outermost layer disposed on one surface or both surfaces of the cell stack in a stacking direction of the positive electrode layer, the solid electrolyte layer, and the negative electrode layer;
• and
• an insulating layer disposed between the outermost layer and the cell stack,
• wherein the outermost layer includes an epoxy resin and glass particles, and
• the glass particles include a boron (B) oxide, a silicon (Si) oxide, and an aluminum (Al) oxide.

A stacked all-solid-state battery, comprising:

• a cell stack including:
• a plurality of solid electrolyte layers, and
• a plurality of positive electrode layers and negative electrode layers alternately disposed in a stacking direction with the plurality of solid electrolyte layers interposed therebetween;
• an outermost layer disposed on one surface or both surfaces of the cell stack in the stacking direction;
• and
• first and second external electrodes disposed laterally on the cell stack and the outermost layer and connected to the plurality of positive electrode layers and the plurality of negative electrode layers, respectively,
• wherein the outermost layer includes an epoxy resin and glass particles, and
• the glass particles include a boron (B) oxide, a silicon (Si) oxide, and an aluminum (Al) oxide.