Dai-Ichi Kogyo Seiyaku Co., Ltd.

Dks Co. Ltd.

Other

National Institute of Advanced Industrial Science and Technology

A School Corporation Kansai University

Tetsuya Higashizaki

Eriko Ishiko

Ayano Sofue

Yuji Hoshihara

Toshinori Sugimoto

Masaaki Matsumoto

Michiyuki Kono

Yasuteru Saito

Yoshiki Ito

Akiyoshi Nishikawa

Yosuke Goi

Takashi Mukai

Yuta Ikeuchi

Masahiro Yanagida

Masashi Ishikawa

Toshikazu Akao

Tadashi Takekawa

Yasuteru Saitou

Mana Ishino

Koichi Sakamoto

Mari Kashima

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

The safety of an assembled battery is improved. An insulating sheetis to be interposed between battery cellshaving planar surfacesfacing each other and is formed of a resin composition containing an inorganic filler. An assembled batteryincludes a plurality of battery cellshaving planar surfacesand the insulating sheet. The insulating sheetis interposed in at least one facing sectionof the plurality of battery cellswhose planar surfacesare arranged to face each other.

Insulating sheet and assembled battery

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

Provided is a lithium-ion battery or lithium-ion capacitor electrode material that can compensate for the drawbacks of a hydrophobic active material, that can impart hydrophilicity to the hydrophobic active material, and that can exhibit excellent dispersibility without deteriorating electrode characteristics. Specifically provided is an electrode material for a lithium-ion battery or a lithium-ion capacitor, the electrode material comprising a composite powder in which a B component is supported or coated on a surface of an A component, the A component comprising a material capable of electrochemically occluding and releasing lithium ions, the B component being sulfur-modified cellulose, and the B component being contained in an amount of 0.01 mass % or more based on 100 mass % of the total amount of the A component and the B component.

Sulfur modified cellulose containing lithium-ion battery electrode material, lithium-ion capacitor electrode material, electrode, battery, capacitor, electric device, production method for lithium-ion battery electrode material, and production method for lithium-ion capacitor electrode material

A flame-retardant lithium secondary battery is provided that has better battery performance and higher safety than conventional batteries. The lithium secondary battery uses a positive electrode that includes a positive electrode active material of the general formula (1) below, and a nonaqueous electrolytic solution in which an ionic liquid that contains bis(fluorosulfonyl)imide anions as an anionic component is used as the solvent, (1) LiNixMnyO, wherein x and y are values that satisfy the relations x+y=2, and x:y=27.572.5 to 22.577.5.

Lithium secondary battery using ionic liquid

An incombustible lithium secondary battery, which has excellent battery capacity and high safety, contains a separator provided between a positive electrode and a negative electrode, and a nonaqueous electrolytic solution containing a lithium salt, in which the nonaqueous electrolytic solution employs an ionic liquid as a solvent, and the separator contains an electrically insulating porous inorganic membrane and a substrate. The ionic liquid may contain a bis(fluorosulfonyl)imide anion as an anionic component, and may contain a cation containing a nitrogen atom as a cationic component.

Lithium secondary battery

The lithium secondary battery of the present invention is a lithium secondary battery including a positive electrode, a negative electrode, a separator provided between the positive electrode and the negative electrode, and a non-aqueous electrolyte containing a lithium salt, wherein the non-aqueous electrolyte includes, as a solvent, an ionic liquid containing a bis(fluorosulfonyl)imide anion as an anion component; and the separator is a nonwoven fabric comprising at least one member selected from an organic fiber and a glass fiber and has a porosity of 70% or more.

A lithium ion secondary battery capable of charging in 15 minutes or less has a cathode with a composite layer on a surface of a collector having an active material and a conducting agent, an anode with an active material, an insulator between the cathode and anode, and an electrolyte with lithium ions. The cathode active material is represented by LiMPO, where M is a metal atom and 0&#x3c;x&#x3c;2 and the conducting agent contains particles between 3 &#x3bc;m and 12 &#x3bc;m in size and in an amount of 1% or more by weight.

Growing community of inventors

Kyoto, Japan

Tetsuya Higashizaki