# US 10,483,549 B2 · Method of manufacturing electrode current collector for secondary battery and electrode including electrode current collector manufactured using the method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,549 B2 - Document ID: US10483549B2 - Status: Granted - Kind: B2 - Application number: 15/752,105 - Filed: 2017-03-15 - Published: 2018-08-23 - Granted: 2019-11-19 - Earliest claimed: 2016-03-21 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Joo Yul Baek; Song Taek Oh; Young Geun Choi - Web page: https://patentgrep.com/patent/US10483549B2 ## CPC - H01M 4/667: {in the form of layers, e.g. coatings} - C01B 32/174: Derivatisation; Solubilisation; Dispersion in solvents - H01M 4/04: Processes of manufacture in general - H01M 4/0404: {by coating on electrode collectors} - H01M 4/0419: {involving spraying} - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 4/66: Selection of materials - H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)} - H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres} - H01M 4/75: Wires, rods or strips - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - B82Y 40/00: Manufacture or treatment of nanostructures - C01B 2202/06: Multi-walled nanotubes - C01B 2202/36: Diameter - H01M 2004/027: {Negative electrodes} - Y02E 60/10: Energy storage using batteries - Y10S 977/752: Multi-walled - Y10S 977/842: for carbon nanotubes or fullerenes - Y10S 977/892: Liquid phase deposition - Y10S 977/948: Energy storage/generating using nanostructure, e.g. fuel cell, battery - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract The present invention relates to a method of manufacturing an electrode current collector for a secondary battery and an electrode including an electrode current collector manufactured using the method. In particular, provided herein are a method of manufacturing an electrode current collector for a secondary battery which includes forming a CNT coating layer on a surface of an electrode current collector to increase electrical conductivity, and an electrode including an electrode current collector manufactured according to the method. ## Claims ### Claim 1 A method of manufacturing a current collector for an electrode for a secondary battery, the method comprising: preparing a carbon nanotube (CNT) dispersion by dispersing CNTs in a dispersion solvent; forming a CNT film on a water surface by spraying the CNT dispersion onto water; forming a CNT coating layer on a metal foil by unwinding the metal foil and passing the metal foil through the water at an angle such that one surface of the metal foil is brought into contact with one end of the CNT film formed on the water surface; and curing the CNT coating layer by heat treatment while rewinding the metal foil with the CNT coating layer formed thereon. ### Claim 2 (depends on 1) The method of claim 1, wherein the dispersion solvent comprises one selected from the group consisting of distilled water, an alcohol, acetonitrile, and acetone, or a mixture of two or more of these materials. ### Claim 3 (depends on 1) The method of claim 1, wherein the CNTs comprise multi-walled CNTs having a diameter of 5 nm to 100 nm. ### Claim 4 (depends on 1) The method of claim 1, wherein the CNT dispersion is prepared by dispersing 0.1 wt % to 10 wt % of the CNTs in the dispersion solvent. ### Claim 5 (depends on 1) The method of claim 1, wherein the metal foil is transferred at a rate of 10 m/min to 50 m/min. ### Claim 6 (depends on 1) The method of claim 1, wherein the metal foil is transferred at an angle of 20° to 45° with respect to the water surface. ### Claim 7 (depends on 1) The method of claim 1, wherein the metal foil comprises copper, stainless steel, aluminum, nickel, titanium, or calcined carbon; stainless steel surface-treated with carbon, nickel, titanium, or silver; or an aluminum-cadmium alloy. ### Claim 8 (depends on 1) The method of claim 1, wherein the metal foil has a thickness of 3 μm to 500 μm. ### Claim 9 (depends on 1) The method of claim 1, wherein the curing is performed by applying hot air at a temperature ranging from 70° C. to 130° C. for a residence time of 10 seconds to 1minute. ### Claim 10 (depends on 1) The method of claim 1, wherein the method further comprises forming an electrode mixture layer by applying an electrode slurry on the CNT coating layer while transferring the metal foil with the CNT coating layer formed thereon, and then pressing and drying the resulting structure. ### Claim 11 (depends on 10) The method of claim 10, wherein the electrode slurry is a negative electrode slurry. ### Claim 12 (depends on 1) An electrode for a secondary battery, comprising: the current collector manufactured according to the method of claim 1; and an electrode mixture layer formed on an outer surface of the CNT coating layer. ### Claim 13 (depends on 12) The electrode of claim 12, wherein the CNT coating layer comprises multi-walled CNTs. ### Claim 14 (depends on 12) The electrode of claim 12, wherein the CNT coating layer has a thickness of 10 nm to 5 μm. ### Claim 15 (depends on 12) The electrode of claim 12, wherein the electrode is a negative electrode. ### Claim 16 (depends on 12) A lithium secondary battery comprising the electrode for a secondary battery of claim 12.