# US 2014/0193681 A1 · Cable-type secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193681 A1 - Document ID: US20140193681A1 - Status: Published application - Kind: A1 - Application number: 14/207,951 - Filed: 2014-03-13 - Published: 2014-07-10 - Earliest claimed: 2011-10-14 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Yo-Han Kwon; Byung-Hun Oh; Je-Young Kim; Heon-Cheol Shin - Web page: https://patentgrep.com/patent/US20140193681A1 ## CPC - H01M 10/0422: {Cells or battery with cylindrical casing} - H01M 4/70: characterised by shape or form - H01M 4/75: Wires, rods or strips - H01M 6/44: of tubular or cup-shaped cells - H01M 10/052: Li-accumulators - H01M 10/058: Construction or manufacture - H01M 4/66: Selection of materials - H01M 2004/025: {with shapes other than plane or cylindrical} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present invention relates to a cable-type secondary battery having a horizontal cross section of a predetermined shape and extending longitudinally, comprising: an inner electrode having an inner current collector and an inner electrode active material layer surrounding the outer surface of the inner current collector; a separation layer surrounding the outer surface of the inner electrode to prevent a short circuit between electrodes; and an outer electrode surrounding the outer surface of the separation layer and having an outer electrode active material layer and an open-structured outer current collector. ## Claims ### Claim 1 A cable-type secondary battery having a horizontal cross section of a predetermined shape and extending longitudinally, comprising: an inner electrode having an inner current collector and an inner electrode active material layer surrounding the outer surface of the inner current collector; a separation layer surrounding the outer surface of the inner electrode to prevent a short circuit between electrodes; and an outer electrode surrounding the outer surface of the separation layer and having an outer electrode active material layer and an open-structured outer current collector. ### Claim 2 (depends on 1) The cable-type secondary battery according to claim 1, wherein the open-structured outer current collector is in the form of a wound wire, a wound sheet or a mesh. ### Claim 3 (depends on 1) The cable-type secondary battery according to claim 1, wherein in the outer electrode, the open-structured outer current collector is formed to surround the outer surface of the separation layer, and the outer electrode active material layer is formed to surround the outer surface of the open-structured outer current collector; the outer electrode active material layer is formed to surround the outer surface of the separation layer, and the open-structured outer current collector is formed to surround the outer surface of the outer electrode active material layer; the open-structured outer current collector is formed to surround the outer surface of the separation layer, and the outer electrode active material layer is formed to surround the outer surface of the open-structured outer current collector and to come into contact with the separation layer; or the outer electrode active material layer is formed to surround the outer surface of the separation layer, and the open-structured outer current collector is formed to be included inside the outer electrode active material layer by being covered therein and to surround the outer surface of the separation layer with spacing apart therefrom. ### Claim 4 (depends on 1) The cable-type secondary battery according to claim 1, wherein the inner current collector is made of stainless steel, aluminum, nickel, titanium, sintered carbon, or copper; stainless steel treated with carbon, nickel, titanium or silver on the surface thereof; an aluminum-cadmium alloy; a non-conductive polymer treated with a conductive material on the surface thereof; or a conductive polymer. ### Claim 5 (depends on 4) The cable-type secondary battery according to claim 4, wherein the conductive material is selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfurnitride, indium tin oxide (ITO), silver, palladium, nickel, and a mixture thereof. ### Claim 6 (depends on 4) The cable-type secondary battery according to claim 4, wherein the conductive polymer is selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfurnitride, and a mixture thereof. ### Claim 7 (depends on 1) The cable-type secondary battery according to claim 1, wherein the open-structured outer current collector is made of stainless steel, aluminum, nickel, titanium, sintered carbon, or copper; stainless steel treated with carbon, nickel, titanium or silver on the surface thereof; an aluminum-cadmium alloy; a non-conductive polymer treated with a conductive material on the surface thereof; a conductive polymer; a metal paste comprising metal powders of Ni, Al, Au, Ag, Al, Pd/Ag, Cr, Ta, Cu, Ba or ITO; or a carbon paste comprising carbon powders of graphite, carbon black or carbon nanotube. ### Claim 8 (depends on 7) The cable-type secondary battery according to claim 7, wherein the conductive material is selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfurnitride, indium tin oxide (ITO), silver, palladium, nickel, and a mixture thereof. ### Claim 9 (depends on 7) The cable-type secondary battery according to claim 7, wherein the conductive polymer is selected from the group consisting of polyacetylene, polyaniline, polypyrrole, polythiophene, polysulfurnitride, and a mixture thereof. ### Claim 10 (depends on 1) The cable-type secondary battery according to claim 1, wherein the inner electrode is an anode and the outer electrode is a cathode, or the inner electrode is a cathode and the outer electrode is an anode. ### Claim 11 (depends on 1) The cable-type secondary battery according to claim 1, wherein when the inner electrode is an anode and the outer electrode is a cathode, the inner electrode active material layer comprises an active material selected from the group consisting of natural graphite, artificial graphite, or carbonaceous material; lithium-titanium complex oxide (LTO), and metals (Me) including Si, Sn, Li, Zn, Mg, Cd, Ce, Ni and Fe; alloys of the metals; oxides (MeOx) of the metals; a complex of the metals and carbon; and a mixture thereof, and the outer electrode active material layer comprises an active material selected from the group consisting of LiCoO2, LiNiO2, LiMn2O4, LiCoPO4, LiFePO4, LiNiMnCoO2, LiNi1-x-y-zCoxM1yM2zO2 (wherein M1 and M2 are each independently selected from the group consisting of Al, Ni, Co, Fe, Mn, V, Cr, Ti, W, Ta, Mg and Mo, and x, y and z are each independently an atomic fraction of oxide-forming elements, in which 0≦x<0.5, 0≦y<0.5, 0≦z<0.5, and x+y+z≦1), and a mixture thereof. ### Claim 12 (depends on 1) The cable-type secondary battery according to claim 1, wherein when the inner electrode is a cathode and the outer electrode is an anode, the inner electrode active material layer comprises an active material selected from the group consisting of LiCoO2, LiNiO2, LiMn2O4, LiCoPO4, LiFePO4, LiNiMnCoO2, LiNi1-x-y-zCoxM1yM2zO2 (wherein M1 and M2 are each independently selected from the group consisting of Al, Ni, Co, Fe, Mn, V, Cr, Ti, W, Ta, Mg and Mo, and x, y and z are each independently an atomic fraction of oxide-forming elements, in which 0≦x<0.5, 0≦y<0.5, 0≦z<0.5, and x+y+z≦1), and a mixture thereof, and the outer electrode active material layer comprises an active material selected from the group consisting of natural graphite, artificial graphite, or carbonaceous material; lithium-titanium complex oxide (LTO), and metals (Me) including Si, Sn, Li, Zn, Mg, Cd, Ce, Ni and Fe; alloys of the metals; oxides (MeOx) of the metals; a complex of the metals and carbon; and a mixture thereof. ### Claim 13 (depends on 1) The cable-type secondary battery according to claim 1, wherein the separation layer is an electrolyte layer or a separator. ### Claim 14 (depends on 13) The cable-type secondary battery according to claim 13, wherein the electrolyte layer comprises an electrolyte selected from a gel polymer electrolyte using PEO, PVdF, PVdF-HFP, PMMA, PAN, or PVAc; and a solid electrolyte using PEO, polypropylene oxide (PPO), polyether imine (PEI), polyethylene sulphide (PES), or polyvinyl acetate (PVAc). ### Claim 15 (depends on 14) The cable-type secondary battery according to claim 14, wherein the electrolyte layer further comprises a lithium salt. ### Claim 16 (depends on 15) The cable-type secondary battery according to claim 15, wherein the lithium salt is selected from the group consisting of LiCl, LiBr, LiI, LiClO4, LiBF4, LiB10Cl10, LiPF6, LiCF3SO3, LiCF3CO2, LiAsF6, LiSbF6, LiAlCl4, CH3SO3Li, CF3SO3Li, (CF3SO2)2NLi, lithium chloroborate, lower aliphatic lithium carbonate, lithium tetraphenylborate, and a mixture thereof. ### Claim 17 (depends on 13) The cable-type secondary battery according to claim 13, wherein the separator is a porous substrate made of a polyolefin-based polymer selected from the group consisting of ethylene homopolymers, propylene homopolymers, ethylene-butene copolymers, ethylene-hexene copolymers, and ethylene-methacrylate copolymers; a porous substrate made of a polymer selected from the group consisting of polyesters, polyacetals, polyamides, polycarbonates, polyimides, polyether ether ketones, polyether sulfones, polyphenylene oxides, polyphenylene sulfides and polyethylene naphthalenes; or a porous substrate made of a mixture of inorganic particles and a binder polymer. ### Claim 18 A cable-type secondary battery having a horizontal cross section of a predetermined shape and extending longitudinally, comprising: an inner electrode having two or more first electrodes arranged in parallel to each other, each first electrode comprising an inner current collector extended in the longitudinal direction, and an inner electrode active material layer formed on the surface of the inner current collector; a separation layer surrounding the outer surface of the inner electrodes to prevent a short circuit between electrodes; and an outer electrode surrounding the outer surface of the separation layer and having an outer electrode active material layer and an open-structured outer current collector. ### Claim 19 (depends on 18) The cable-type secondary battery according to claim 18, wherein the open-structured outer current collector is in the form of a wound wire, a wound sheet or a mesh. ### Claim 20 (depends on 18) The cable-type secondary battery according to claim 18, wherein in the outer electrode, the open-structured outer current collector is formed to surround the outer surface of the separation layer, and the outer electrode active material layer is formed to surround the outer surface of the open-structured outer current collector; the outer electrode active material layer is formed to surround the outer surface of the separation layer, and the open-structured outer current collector is formed to surround the outer surface of the outer electrode active material layer; the open-structured outer current collector is formed to surround the outer surface of the separation layer, and the outer electrode active material layer is formed to surround the outer surface of the open-structured outer current collector and to come into contact with the separation layer; or the outer electrode active material layer is formed to surround the outer surface of the separation layer, and the open-structured outer current collector is formed to be included inside the outer electrode active material layer by being covered therein and to surround the outer surface of the separation layer with spacing apart therefrom.