An electrode structure comprising: a current collector having a folded structure comprising an outer surface and an inner surface, the inner surface defining an inner space, wherein the outer surface comprises a first portion, a second portion facing oppositely away from the first portion, and an intermediate portion between the first portion and the second portion; a cathode active material layer on the first portion of the outer surface; an anode active material layer on the second portion of the outer surface; and a compression pad disposed inside the inner space of the folded structure of the current collector, wherein the compression pad is made of an elastic material comprising at least one selected from polyurethane, natural rubber, spandex, butyl rubber (isobutylene isoprene rubber, IIR), fluoroelastomer, ethylene-propylene rubber, styrene-butadiene rubber, chloroprene, elastin, epichlorohydrin rubber, nylon, polyterpene, isoprene rubber, polybutadiene, nitrile rubber, thermoplastic elastomer, silicone rubber, ethylene-propylene-diene rubber (EPDM), ethylene vinyl acetate, halogenated butyl rubber, and neoprene, the compression pad is capable of being pressed to have a thickness of 40% to 90% of an initial thickness thereof before being pressed, and a thickness of the compression pad is 200% to 500% of a thickness of a lithium deposition layer of an anode formed when charging an all-solid secondary battery comprising the electrode structure, wherein the thickness of the lithium deposition layer of the anode is determined according to the amount of lithium moving from the cathode to the anode. a current collector having a folded structure comprising an outer surface and an inner surface, the inner surface defining an inner space, wherein the outer surface comprises a first portion, a second portion facing oppositely away from the first portion, and an intermediate portion between the first portion and the second portion; a cathode active material layer on the first portion of the outer surface; an anode active material layer on the second portion of the outer surface; and a compression pad disposed inside the inner space of the folded structure of the current collector, wherein the compression pad is made of an elastic material comprising at least one selected from polyurethane, natural rubber, spandex, butyl rubber (isobutylene isoprene rubber, IIR), fluoroelastomer, ethylene-propylene rubber, styrene-butadiene rubber, chloroprene, elastin, epichlorohydrin rubber, nylon, polyterpene, isoprene rubber, polybutadiene, nitrile rubber, thermoplastic elastomer, silicone rubber, ethylene-propylene-diene rubber (EPDM), ethylene vinyl acetate, halogenated butyl rubber, and neoprene, the compression pad is capable of being pressed to have a thickness of 40% to 90% of an initial thickness thereof before being pressed, and a thickness of the compression pad is 200% to 500% of a thickness of a lithium deposition layer of an anode formed when charging an all-solid secondary battery comprising the electrode structure, wherein the thickness of the lithium deposition layer of the anode is determined according to the amount of lithium moving from the cathode to the anode.