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

Power storage device composition, power storage device electrode slurry, power storage device electrode, and power storage device

An energy storage device and composition technology, which is applied to non-aqueous electrolyte battery electrodes, battery electrodes, hybrid capacitor electrodes, etc., can solve problems such as capacity reduction, active material peeling, and inability to maintain tightness, and achieve battery performance improvement, The effect of improving flexibility and adhesion

Pending Publication Date: 2021-02-19
株式会社引能仕材料
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the active material using such a material with a large lithium storage capacity is accompanied by a large volume change due to the storage and release of lithium.
Therefore, if the conventionally used electrode binder is applied to such a material with a large lithium storage capacity, the adhesiveness cannot be maintained, and the active material is peeled off, resulting in a significant decrease in capacity due to charge and discharge.

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
  • Power storage device composition, power storage device electrode slurry, power storage device electrode, and power storage device
  • Power storage device composition, power storage device electrode slurry, power storage device electrode, and power storage device
  • Power storage device composition, power storage device electrode slurry, power storage device electrode, and power storage device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0193] 2.2.4. Preparation method of slurry for storage device electrodes

[0194] The slurry for an electrical storage device electrode according to this embodiment may be a slurry for an electrical storage device electrode produced by any method as long as it contains the above-mentioned composition for an electrical storage device and an active material. Manufactured by the method described in et al.

[0195] 3. Electrode of electrical storage equipment

[0196] The electrical storage device electrode of the present embodiment includes a current collector and an active material layer formed by applying and drying the above-mentioned slurry for electrical storage device electrodes on the surface of the current collector. This electrical storage device electrode is produced by coating the above-mentioned slurry for electrical storage device electrodes on the surface of a current collector such as a metal foil to form a coating film, and then drying the coating film to form an...

Embodiment 2～26

[0249] 5.2. Examples 2-26, Comparative Examples 1-10

[0250] In the above "5.1.1. Preparation and evaluation of the composition for electrical storage devices (1) Preparation of the composition for electrical storage devices", the types and amounts of each monomer are shown in Table 1 or Table 2 below. , except that, it carried out similarly, and obtained the composition for electrical storage devices containing 20 mass % of polymer components. It should be noted that, in this specification, the polymer particles (A) obtained in Example 1 are referred to as "polymer particles (A1)", and the polymer particles (A) obtained in Example 5 are similarly referred to as "Polymer particle (A5)" and the polymer particle (A) obtained in Example 19 are called "polymer particle (A19)" etc. In addition, the polymer particles obtained in Comparative Example 1 are referred to as "polymer particles (B1)", and the polymer particles obtained in Comparative Example 9 are similarly referred to a...

Embodiment 32

[0253] The composition for electrical storage devices of pH9.0 containing 20 mass % of polymer particles (A5) was obtained similarly to Example 5. Next, 1 part by mass of a thickener (trade name "CMC2200", manufactured by Daicel Co., Ltd.) was put into a twin-shaft planetary mixer (manufactured by Primex Co., Ltd., trade name "TK HIVIS MIX 2P-03") as a component to be added first. (in terms of solid content, added as an aqueous solution with a concentration of 2% by mass), 1 part by mass of the polymer (A5) (in terms of solid content, as a battery at pH 9.0 containing 20% ​​by mass of the polymer (A5) obtained above equipment composition), 76 parts by mass (in terms of solid content) of artificial graphite (manufactured by Hitachi Chemical Industry Co., Ltd., trade name "MAG") as a highly crystalline graphite as a negative electrode active material, the graphite coating obtained above 19 parts by mass of film silicon oxide powder (in terms of solid content) and 1 part by mass ...

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
particle sizeaaaaaaaaaa
viscosityaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

Provided is a power storage device composition that has excellent flexibility and adhesive properties and makes it possible to produce a power storage device electrode that has favorable charge / discharge durability characteristics. This power storage device composition contains polymer particles (A) and a liquid medium (B). The number average particle size of the polymer particles (A) is 50-500 nm. When the total amount of repeating units included in the polymer particles (A) is taken to be 100 parts by mass, the polymer particles (A) contain 1-50 parts by mass of a repeating unit (a1) that isderived from a conjugated diene compound, 5-90 parts by mass of a repeating unit (a2) that is derived from an unsaturated carboxylic acid, and 5-90 parts by mass of a repeating unit (a3) that is derived from a (meth)acrylamide, the total amount of repeating unit (a2) and repeating unit (a3) being at least 50 parts by mass.

Description

technical field [0001] The present invention relates to a composition for an electrical storage device, a slurry for an electrical storage device electrode containing the composition and an active material, an electrode for an electrical storage device formed by applying the slurry to a current collector and drying the electrode, and an electrode provided with the electrode power storage equipment. Background technique [0002] In recent years, power storage devices with high voltage and high energy density have been required as power sources for driving electronic devices. As such power storage devices, lithium ion batteries, lithium ion capacitors, and the like have been expected. [0003] An electrode used in such an electrical storage device is produced by applying a composition (slurry for electrode) containing an active material and a polymer functioning as a binder on the surface of a current collector and drying it. The characteristics required for polymers used as...

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): H01M4/62C08F257/02C08F279/02H01G11/38H01G11/46H01M4/13H01M4/134
CPCH01M4/13H01M4/134H01M4/62C08F257/02C08F279/02H01G11/38H01G11/46Y02E60/10H01M4/622H01M4/131H01G11/50
Inventor 中山卓哉增田香奈西条飒一吉田有希
Owner 株式会社引能仕材料