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

A storage device and composition technology, applied in the direction of non-aqueous electrolyte battery electrodes, battery electrodes, hybrid capacitor electrodes, etc., can solve the problems of capacity reduction, active material stripping, and failure to maintain adhesion, etc., to improve battery performance, Effect of improving softness and adhesiveness

Pending Publication Date: 2021-02-19
株式会社引能仕材料
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  • 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

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  • 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

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preparation example Construction

[0139] 2.2.4. Preparation method of slurry for storage device electrodes

[0140] 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.

[0141] 3. Electrode of electrical storage equipment

[0142] 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. The electrical storage device electrode is manufactured 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...

Embodiment 2～25

[0194] 5.2. Examples 2-25, Comparative Examples 1-8

[0195] 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 as described 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 (A) obtained in Example 1 is referred to as "polymer (A1)", and the polymer (A) obtained in Example 7 is similarly referred to as "polymer (A7)", the polymer (A) obtained in Example 14 is called "polymer (A14)", etc. In addition, the polymer obtained in Comparative Example 1 is referred to as "polymer (B1)", and the polymer obtained in Comparative Example 5 is similarly referred to as "polymer (B5)", etc.

[0196] Furthermore, except for using the composition for electr...

Embodiment 31

[0198] The composition for electrical storage devices of pH9.0 containing 20 mass % of polymers (A7) was obtained similarly to Example 7. 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 polymer (A7) (in terms of solid content, as a battery at pH 9.0 containing 20% ​​by mass of the polymer (A7) 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 of carbon (De...

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Abstract

Provided is a power storage device composition that has excellent flexibility and adhesive properties and that makes it possible to produce a power storage device electrode that has favorable charge / discharge durability characteristics. This power storage device composition contains a polymer (A) and a liquid medium (B). When the total amount of repeating units included in the polymer (A) is takento be 100 parts by mass, the polymer (A) contains 5-50 parts by mass of a repeating unit (a1) that is derived 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) beingat 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 it, and a device including 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 binders include th...

Claims

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Application Information

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IPC IPC(8): H01M4/62C08F220/04C08F220/56C08F236/04C08L25/10C08L27/12C08L33/02C08L33/26C08L47/00H01G11/38H01M4/13H01M4/134
CPCH01M4/13H01M4/134H01M4/62C08F220/04C08F220/56C08F236/04C08L25/10C08L27/12C08L33/02C08L33/26C08L47/00H01G11/38Y02E60/10H01M4/622H01M4/131H01G11/50
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
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