Unlock instant, AI-driven research and patent intelligence for your innovation.

Dispersant, dispersoid, resin composition, composite slurry, electrode film, and non-aqueous electrolyte secondary battery

A dispersant and polymer technology, applied in the direction of non-aqueous electrolyte battery electrodes, secondary batteries, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of not showing the dispersion effect and achieve excellent rate characteristics and cycle characteristics, excellent dispersibility and storage stability, and excellent adhesion and conductivity

Pending Publication Date: 2021-11-05
TOYO INK SC HOLD CO LTD +1
View PDF17 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although polymer dispersants such as PVA or PVP have shown effects in polar solvents such as N-methyl-2-pyrrolidone or water, they have not shown dispersion effects in other dispersion media.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dispersant, dispersoid, resin composition, composite slurry, electrode film, and non-aqueous electrolyte secondary battery
  • Dispersant, dispersoid, resin composition, composite slurry, electrode film, and non-aqueous electrolyte secondary battery
  • Dispersant, dispersoid, resin composition, composite slurry, electrode film, and non-aqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0182] Hereinafter, the present invention will be described in more detail, but the present invention is not limited to these examples. In the examples, "carbon nanotube" is sometimes abbreviated as "CNT". In addition, "mass %" is described as "%". The compounding quantity in a table|surface is mass %.

[0183] [Example Group α]

[0184] The molecular weight of the dispersant of the present invention, the binder resin, and various physical properties of the dispersion using the dispersant of the present invention were evaluated as follows.

[0185] (Measuring method of weight average molecular weight (Mw))

[0186] The weight average molecular weight (Mw) is determined by gel permeation chromatography (GPC) equipped with a refractive index (Refractive index, RI) detector.

[0187] The device uses HLC-8320GPC (manufactured by Tosoh Corporation), and three separation columns are connected in series, and the packing agent is sequentially used "TSK-GELSUPER (TSK-GELSUPER) AW-400...

Embodiment 98

[0352] According to the composition and dispersion time shown in Table 5β, put 0.8 parts of dispersant, 0.2 parts of additives and 97 parts of dispersion medium into glass bottles (M-225, manufactured by Baiyang Glass Co., Ltd.), fully mix and dissolve or mix, and use as Two parts of CNT were added to the conductive material, and zirconia beads (bead diameter: 0.5mmφ) were used as the medium to disperse with a coating conditioner to obtain a CNT dispersion (CNT dispersion 1β). As shown in Table 5β, CNT dispersion 1β has low viscosity and good storage stability.

[0353] (Example 99β to Example 123β, Comparative Example 18β to Comparative Example 21β)

[0354] According to the composition and dispersion time shown in Table 5β, each CNT dispersion (CNT dispersion 2β to CNT dispersion 26β, comparative CNT dispersion 1β to comparative CNT dispersion 4β) was obtained in the same manner as in Example 100β. As shown in Table 5β, the CNT dispersions of the present invention (CNT disp...

Embodiment 124

[0379] At 150cm in capacity 3 After adding the CNT dispersion (CNT dispersion 1β), CMC and water in the plastic container, use the self-rotating revolution mixer (the defoaming and stirring Taro manufactured by Xinji (Thinky) Company, ARE-310), stir with 2000rpm for 30 seconds, A CNT-containing resin composition 1β was obtained. Then, the active material was added, and the mixture was stirred at 2000 rpm for 150 seconds using the self-rotating mixer. Further, SBR was then added, and stirred at 2000 rpm for 30 seconds using the above-mentioned rotary-revolving mixer, to obtain composite material composition 1β for negative electrode. The nonvolatile content of composite material composition 1β for negative electrodes was 48% by mass. The active material: CNT: CMC: SBR non-volatile component ratio in the composite material composition for negative electrodes was 97:0.5:1:1.5.

[0380] ・Artificial graphite: CGB-20 (manufactured by Nippon Graphite Industry Co., Ltd.), 100% non-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
electrical resistivityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention addresses the problem of providing: a dispersant which enables the production of a dispersoid having excellent dispersibility and storage stability even when the dispersant is used in a small amount; a dispersoid having excellent dispersibility and storage stability; an electrode film having excellent adhesiveness and electrical conductivity; and a non-aqueous electrolyte secondary battery having excellent rate properties and cycle properties. The problem can be solved by a dispersant which is a polymer containing 40 to 100% by mass of a (meth)acrylonitrile-derived unit and having a weight average molecular weight of 5000 to 400000.

Description

technical field [0001] The invention relates to a dispersant, a dispersion, a resin composition, a composite material slurry, an electrode film and a nonaqueous electrolyte secondary battery. Background technique [0002] It is known that in general, when producing inks and the like, it is difficult to stably disperse pigments at high concentrations, which causes various problems in the production process and the product itself. For example, a dispersion containing a pigment containing fine particles often exhibits high viscosity, not only is it difficult to take out or transport the product from the disperser, but also gels during storage in poor cases, and is even difficult to handle. Furthermore, regarding the surface of the developed object, state defects such as a decrease in gloss and poor leveling may occur. [0003] Therefore, a dispersant is generally used in order to keep the dispersed state well. A dispersant has a structure of a site adsorbed on a pigment and a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C08F220/06C08F220/10C08F220/44C08L33/20H01M4/13H01M4/139H01M4/62H01G11/38H01B1/20H01B1/24C08K3/01C09K23/52
CPCC08F220/44H01B1/24H01G11/38H01M4/139H01M4/62Y02E60/10C11D3/3769C08F8/48C09D133/20C09D127/16C08F220/06C08F212/08C08F220/20C08F220/34C08F226/06C08F220/1808C08F220/40C08F222/40C08K3/04C08K3/01C08L33/20C08K3/041C08F120/44C08F220/10H01B1/20C09K23/34C08F220/46H01M4/0416H01M4/1393H01M4/587H01M4/623H01M4/625H01M10/0525
Inventor 铃木雄太青谷优森田雄平林穂波星野智彦
Owner TOYO INK SC HOLD CO LTD