ALL-SOLID-STATE BATTERY

An all-solid-state battery includes: a stack including first and second surfaces facing each other in a first direction, third and fourth surfaces facing each other in a second direction and connecting the first and second surfaces, fifth and sixth surfaces facing each other in a third direction and connecting the first and second surfaces, a solid electrolyte layer, and positive and negative electrode layers alternately stacked in the third direction with the solid electrolyte layer interposed therebetween; a first external electrode connected to the positive electrode layer and disposed outside the stack; and a second external electrode connected to the negative electrode layer and disposed outside the stack, wherein the positive electrode layer includes a positive electrode current collector containing graphite; the negative electrode layer includes a negative electrode current collector containing graphite the first external electrode includes silver (Ag); and the second external electrode includes copper (Cu).