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 (EPR), styrene-butadiene rubber (SBR), chloroprene, elastin, epichlorohydrin rubber, nylon, polyterpene, isoprene rubber, polybutadiene, nitrile rubber, thermoplastic elastomer, silicone rubber, ethylene-propylene-diene rubber (EPDM), ethylene vinyl acetate (EVA), 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 (EPR), styrene-butadiene rubber (SBR), chloroprene, elastin, epichlorohydrin rubber, nylon, polyterpene, isoprene rubber, polybutadiene, nitrile rubber, thermoplastic elastomer, silicone rubber, ethylene-propylene-diene rubber (EPDM), ethylene vinyl acetate (EVA), 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. <EOS>