# US 2018/0026264 A1 · Battery negative electrode, battery, and manufacturing method of battery negative electrode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026264 A1 - Document ID: US20180026264A1 - Status: Published application - Kind: A1 - Application number: 15/459,871 - Filed: 2017-03-15 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: The Japan Steel Works, Ltd.; Exergy Power Systems, Inc. - Applicants: Exergy Power Systems, Inc. - Inventors: Tomohiro UENO; Kazuya KUBO; Hiroshi KAWANO; Toshio TAKAHASHI; Kaduo TSUTSUMI - Web page: https://patentgrep.com/patent/US20180026264A1 ## CPC - H01M 4/383: {Hydrogen absorbing alloys} - B22F 1/145: Chemical treatment, e.g. passivation or decarburisation - B22F 9/04: starting from solid material, e.g. by crushing, grinding or milling ({C22C1/1084 takes precedence}; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C) - C22C 19/03: based on nickel - C22F 1/10: of nickel or cobalt or alloys based thereon - H01M 4/0404: {by coating on electrode collectors} - H01M 4/52: of nickel, cobalt or iron - H01M 10/26: Selection of materials as electrolytes - H01M 10/345: {Gastight metal hydride accumulators} - B22F 2301/15: Nickel or cobalt - B22F 2304/10: Micron size particles, i.e. above 1 micrometer up to 500 micrometer - B22F 2998/10: Processes characterised by the sequence of their steps - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2220/10: Batteries in stationary systems, e.g. emergency power source in plant - H01M 2300/0014: Alkaline electrolytes - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - C22C: ALLOYS (treatment of alloys C21D, C22F) - C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00) - 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 ## Abstract A battery negative electrode includes a hydrogen storage alloy as a negative electrode active material, wherein the hydrogen storage alloy has a mean volume diameter within a range from 4 μm to 12 μm, and is disposed to be capable of being in contact with hydrogen in a hydrogen containing part in which hydrogen is contained. ## Claims ### Claim 1 A battery negative electrode comprising a hydrogen storage alloy as a negative electrode active material, wherein the hydrogen storage alloy has a mean volume diameter within a range from 4 μm to 12 μm, and is disposed to be capable of being in contact with hydrogen in a hydrogen containing part in which hydrogen is contained. ### Claim 2 (depends on 1) The battery negative electrode according to claim 1, wherein the hydrogen storage alloy discharges while consuming the hydrogen during discharge. ### Claim 3 (depends on 1) The battery negative electrode according to claim 1, wherein the hydrogen storage alloy is used in contact with an electrolyte. ### Claim 4 (depends on 1) The battery negative electrode according to claim 1, further comprising the hydrogen containing part. ### Claim 5 (depends on 4) The battery negative electrode according to claim 4, further comprising a hydrogen moving channel in which hydrogen moves from the hydrogen containing part to enable the hydrogen to be in contact with the battery negative electrode. ### Claim 6 (depends on 1) A battery comprising: the battery negative electrode according to claim 1; and a positive electrode having nickel hydroxide. ### Claim 7 (depends on 6) The battery according to claim 6, further comprising: an electrolyte; and a separator, wherein: the electrolyte is disposed between the battery negative electrode and the positive electrode, and the separator is disposed in the electrolyte at a position where it separates the battery negative electrode from the positive electrode. ### Claim 8 (depends on 7) The battery according to claim 7, further comprising a hydrogen containing part, and wherein the hydrogen containing part is disposed such that the battery negative electrode is enabled to be in contact with hydrogen on an opposite face to a face of the battery negative electrode on which the battery negative electrode is in contact with the electrolyte. ### Claim 9 (depends on 8) The battery according to claim 8, further comprising a hydrogen moving channel in which hydrogen moves between the hydrogen containing part and the battery negative electrode to enable the hydrogen to be in contact with the battery negative electrode. ### Claim 10 A manufacturing method of a battery negative electrode, the method comprising: manufacturing a hydrogen storage alloy fine powder by crushing a hydrogen storage alloy to have a mean volume diameter within a range from 4 μm to 12 μm; removing a surface layer containing an oxide coating film by performing a surface treatment on the hydrogen storage alloy fine powder; and supporting, as a negative electrode active material, the hydrogen storage alloy fine powder after the surface treatment on a supporting body to dispose it to be capable of being in contact with hydrogen. ### Claim 11 (depends on 10) The manufacturing method of a battery negative electrode according to claim 10, wherein the surface treatment is performed by bringing the hydrogen storage alloy fine powder into contact with a heated alkaline aqueous solution or a heated acidic aqueous solution. ### Claim 12 (depends on 11) The manufacturing method of a battery negative electrode according to claim 11, wherein the contact is performed while stirring the solution.