# US 8,785,039 B2 · Battery-dedicated electrode foil, positive electrode plate, battery, vehicle, and battery-equipped appliance, and manufacture method for the battery-dedicated electrode foil, and manufacture method of the positive electrode plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,039 B2 - Document ID: US8785039B2 - Status: Granted - Kind: B2 - Application number: 13/002,665 - Filed: 2009-07-01 - Published: 2011-05-12 - Granted: 2014-07-22 - Earliest claimed: 2008-07-11 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Yozo Uchida; Tadashi Teranishi - Inventors: Yozo Uchida; Tadashi Teranishi - Web page: https://patentgrep.com/patent/US8785039B2 ## CPC - H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)} - H01M 4/139: Processes of manufacture - H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres} - H01M 4/664: {Ceramic materials} - H01M 4/667: {in the form of layers, e.g. coatings} - H01M 10/052: Li-accumulators - H01M 10/0568: characterised by the solutes - H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - 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 - Y10T 29/49115: including coating or impregnating - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A battery-dedicated electrode foil (32) includes an aluminum electrode foil (33) in which metal aluminum is exposed, and corrosion-resistant layers (34A, 34B) that are formed on surfaces (33a, 33b) of the aluminum electrode foil, and that are in direct contact with the metal aluminum that forms the aluminum electrode foil, and that is made of tungsten carbide. ## Claims ### Claim 1 A positive electrode plate comprising: a battery-dedicated electrode foil which comprises an aluminum electrode foil in which metal aluminum is exposed, or which has on metal aluminum an aluminum oxide layer of 3 nm or less in film thickness; and a corrosion-resistant layer on a surface of the aluminum electrode foil, and being in direct contact with the metal aluminum of the aluminum electrode foil, or in contact with the aluminum oxide layer, the corrosion-resistant layer being made of a carbide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium, wherein a thickness of the corrosion-resistant layer is 3 nm to 90 nm; and a positive electrode active material layer that contains a positive electrode active material and that is supported on a main surface of the battery-dedicated electrode foil. ### Claim 2 (depends on 1) The positive electrode plate according to claim 1, wherein the corrosion-resistant layer is in direct contact with the metal aluminum that forms the aluminum electrode foil. ### Claim 3 (depends on 1) The positive electrode plate according to claim 1, wherein the corrosion-resistant layer is made of a carbide of the at least one substance. ### Claim 4 (depends on 1) The positive electrode plate according to claim 1, wherein the corrosion-resistant layer is made of a carbide or an oxide of tungsten. ### Claim 5 (depends on 1) The positive electrode plate according to claim 1, wherein a diamond-like carbon coating of 0.5 nm to 50 nm in thickness is provided on the corrosion-resistant layer. ### Claim 6 (depends on 1) The positive electrode plate according to claim 1, wherein the positive electrode active material contains a Li compound, and the positive electrode active material layer is formed by applying a water-based active material paste whose solvent is water. ### Claim 7 (depends on 1) A battery comprising: a power generation element that includes the positive electrode plate according to claim 1. ### Claim 8 (depends on 7) The battery according to claim 7, comprising an electrolyte solution that contains an Li ion, wherein the positive electrode active material layer contains the positive electrode active material that includes a Li compound. ### Claim 9 (depends on 8) The battery according to claim 8, wherein the electrolyte solution contains LiCIO4. ### Claim 10 (depends on 7) A vehicle equipped with the battery according to claim 7. ### Claim 11 (depends on 7) A battery-equipped appliance that is equipped with the battery according to claim 7. ### Claim 12 A manufacture method for a positive electrode plate that includes a battery-dedicated electrode foil, and a positive electrode active material layer that is supported on a main surface of the battery-dedicated electrode foil, and that contains a positive electrode active material, wherein the battery-dedicated electrode foil comprises an aluminum electrode foil in which metal aluminum is exposed, or which has on metal aluminum an aluminum oxide layer of 3 nm or less in film thickness; and a corrosion-resistant layer on a surface of the aluminum electrode foil, and being in direct contact with the metal aluminum of the aluminum electrode foil, or in contact with the aluminum oxide layer, the corrosion-resistant layer being made of a carbide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium, wherein a thickness of the corrosion-resistant layer is 3 nm to 90 nm, and the positive electrode active material layer contains the positive electrode active material that includes a Li compound, and the positive electrode active material that includes the Li compound is contained in the main surface of the battery-dedicated electrode foil, the manufacture method comprising a positive electrode active material layer formation step of forming the positive electrode active material layer by applying and drying a water-based active material paste whose solvent is water.