An all-solid-state battery includes a first solid electrolyte layer on the first electrode, a porous adhesive structure on the first solid electrolyte layer, a second solid electrolyte layer on the porous adhesive structure, and a second electrode on the second solid electrolyte layer. The porous adhesive structure has a porous frame with two surfaces, each covered with adhesive layers partially filling pores of the porous frame. The first adhesive layer contacts the porous frame and the first electrolyte layer, while the second adhesive layer contacts the porous frame and the second solid electrolyte layer. The first and the second solid electrolyte layers include binders, each having a content about 0.1% to about 5% by weight.

A hybrid solid-state electrolyte layer for use in an electrochemical cell is provided. The hybrid solid-state electrolyte layer includes a polymeric material, a ceramic material, and an interfacial material adhering the polymeric material and the ceramic material. The interfacial material includes a branched copolymer that includes dopamine and a second monomer. The second monomer forms a polymeric moiety in the copolymer that is the same or similar to the polymeric material. In certain variations, the polymeric material defines a polymeric layer, the ceramic material defines a ceramic layer, and the interfacial material defines an interfacial layer that is disposed between the polymeric layer and the ceramic layer. In other variations, the polymeric material defines a polymeric matrix, the ceramic material defines a plurality of ceramic particles dispersed in the polymeric matrix, and the plurality of ceramic particles are coated with the interfacial material.