METHOD OF MANUFACTURING NEGATIVE ELECTRODE FOR SECONDARY BATTERY

• Main Author: UEZONO TOMOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method of manufacturing a negative electrode for a secondary battery that can enhance durability of a battery.SOLUTION: A manufacturing method of a negative electrode for a secondary battery includes a granulating step of granulating wet granulated particles containing a metal-based negative electrode active material containing at least one metal element as a constituent element, a carbon material, binder, and solvent, and a step of pressing powder of the wet granulated particles to form a negative electrode active material layer on a negative electrode current collector. The granulating step includes a first mixing treatment of mixing the metal-based negative electrode active material, the binder and the solvent, and a second mixing treatment of mixing the obtained mixture with a carbon material after the first mixing treatment.SELECTED DRAWING: Figure 2 【課題】電池の耐久性を向上させ得る二次電池用負極の製造方法を提供する。【解決手段】ここで提案される二次電池用負極の製造方法は、少なくとも一つの金属元素を構成元素とする金属系負極活物質と炭素材料とバインダと溶媒とを含む湿潤造粒粒子を造粒する造粒工程と、湿潤造粒粒子の粉体をプレスすることにより負極集電体上に負極活物質層を形成する工程とを包含する。造粒工程には、金属系負極活物質とバインダと溶媒とを混合する第１混合処理と、第１混合処理の後、得られた混合物に炭素材料を混合する第２混合処理とが含まれる。【選択図】図２