Abstract: A secondary battery includes a jelly roll-type electrode assembly impregnated with an electrolyte solution; a battery case for housing the electrode assembly and the electrolyte solution; a cap assembly coupled with an upper portion of the battery case; and a reference electrode in which one end is immersed with the electrolyte solution and the other end is exposed to the outside through the battery case and the cap assembly.

Abstract: The present invention provides a manufacturing method of a lithium rechargeable battery, including (i) preparing a lithium metal electrode in which metal lithium (Li) is formed on one surface or both surfaces of a current collector; (ii) applying an electrolyte solution for coating including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives on a surface of the metal lithium to form a passive film which is a stable coat; (iii) manufacturing an electrode assembly including the lithium metal electrode as a negative electrode; and (iv) housing the electrode assembly in a rechargeable battery case and injecting an electrolyte solution for injection including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives to manufacture a rechargeable battery.

Abstract: The present invention provides a manufacturing method of a lithium rechargeable battery, including (i) preparing a lithium metal electrode in which metal lithium (Li) is formed on one surface or both surfaces of a current collector; (ii) applying an electrolyte solution for coating including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives on a surface of the metal lithium to form a passive film which is a stable coat; (iii) manufacturing an electrode assembly including the lithium metal electrode as a negative electrode; and (iv) housing the electrode assembly in a rechargeable battery case and injecting an electrolyte solution for injection including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives to manufacture a rechargeable battery.

Abstract: An electrode assembly includes a first electrode plate including a first electrode current collector and a first electrode active material layer thereon, a second electrode plate including a second electrode current collector and a second electrode active material layer thereon, a separator between the first electrode plate and the second electrode plate, a first electrode tab coupled to the first electrode current collector, and a second electrode tab coupled to the second electrode current collector, wherein a region of the first electrode current collector including the first electrode tab faces a wound first electrode plate, wherein a region of the second electrode current collector including the second electrode tab faces a wound second electrode plate, and wherein the second electrode active material layer is only on one surface of the second electrode current collector in a region preceding a first winding turn of the second electrode plate.

Abstract: An electrode assembly includes a first electrode plate including a first electrode current collector and a first electrode active material layer thereon, a second electrode plate including a second electrode current collector and a second electrode active material layer thereon, a separator between the first electrode plate and the second electrode plate, a first electrode tab coupled to the first electrode current collector, and a second electrode tab coupled to the second electrode current collector, wherein a region of the first electrode current collector including the first electrode tab faces a wound first electrode plate, wherein a region of the second electrode current collector including the second electrode tab faces a wound second electrode plate, and wherein the second electrode active material layer is only on one surface of the second electrode current collector in a region preceding a first winding turn of the second electrode plate.

Abstract: A method of rapidly fabricating a graphene-based nanocomposite using oxidation-reduction and a graphene-based nanocomposite fabricated by the same method. A solution in which a graphene oxide is dispersed is prepared. A source material for a metal oxide is added into the solution in which the graphene oxide is dispersed. A nanocomposite is formed by forming the metal oxide on at least one surface of graphene that is reduced using oxidation-reduction between the graphene oxide and the source material for the metal oxide. The reduction voltage of the source material for the metal oxide is 1.0 V or less.