Dai-ichi Kogyo Seiyaku Co., Ltd.

Dks Co. Ltd.

Masaaki Matsumoto

Tetsuya Higashizaki

Yasuteru Saito

Ayano Sofue

Yoshiki Ito

Yuji Hoshihara

Yosuke Goi

Akiyoshi Nishikawa

Koichi Sakamoto

A technique relating to a binder having high workability while retaining binding properties is provided. An electrode binder composition includes an aqueous polyurethane resin dispersion in which a polyurethane resin is dispersed in water, a carbon nanotube, and a surfactant. The surfactant includes at least one selected from the group consisting of nonionic surfactants, silicon-based surfactants, and fluorine-based surfactants, and a content of the surfactant is 0.1 mass % or more and 20 mass % or less relative to a total amount of the polyurethane resin, the carbon nanotube, and the surfactant.

Electrode binder composition, electrode coating liquid composition, power storage device electrode, and power storage device

A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.

Dispersant for electrode coating liquid, electrode coating liquid composition including the dispersant for electrode coating liquid, electrode for power storage device manufactured using the electrode coating liquid composition, and power storage device having the electrode

An electrode coating liquid composition that contains an electrode active material, a conductive auxiliary, a dispersant, and a binding agent. The dispersant contains cellulose fibers that satisfy (a)-(c). A total amount of the dispersant and the binding agent is 0.5 mass % or more and 15 mass % or less with respect to 100 mass % of the solid content of the electrode coating liquid composition. (a) the number average width of the shortest widths is 2 nm or more and 200 nm or less. (b) the aspect ratio is 7.5 or more and 75 or less. (c) cellulose I crystals are included and the crystallinity thereof is 70% or more and 95% or less.

Electrode coating liquid composition, electrode for power storage device manufactured using the electrode coating liquid composition, and power storage device having the electrode

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Kyoto, Japan

Masaaki Matsumoto