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Resin for energy device electrode, composition for forming energy device electrode, energy device electrode, and energy device

a technology for energy devices and electrodes, applied in the direction of non-aqueous electrolyte accumulator electrodes, cell components, electrochemical generators, etc., can solve the problem of inhibiting the capacity increase of lithium ion secondary batteries

Inactive Publication Date: 2019-12-12
SHOWA DENKO MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent provides a resin for use in energy device electrodes that has both adhesion and rollability. Additionally, a composition for forming an energy device electrode that uses this resin is also provided. The technical effect is that this resin improves the performance of energy devices by making them more efficient and easier to manufacture.

Problems solved by technology

However, since PVDF has poor adhesion to the current collector, when an electrode using PVDF is prepared, in order to ensure adhesion of the interface between a mixture layer and a current collector, a large amount of PVDF should be blended to an active material, which is a factor inhibiting increase in capacity of a lithium ion secondary battery.

Method used

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  • Resin for energy device electrode, composition for forming energy device electrode, energy device electrode, and energy device
  • Resin for energy device electrode, composition for forming energy device electrode, energy device electrode, and energy device
  • Resin for energy device electrode, composition for forming energy device electrode, energy device electrode, and energy device

Examples

Experimental program
Comparison scheme
Effect test

example 1a

[0178]A reaction solution was prepared by adding, in 1.0-liter separable flask equipped with a stirrer, a thermometer, and a condenser, 41.8 g of acrylonitrile corresponding to a nitrile group-containing monomer (Wako Pure Chemical Industries, Ltd.), 1.4 g of methoxytriethylene glycol acrylate corresponding to a monomer represented by Formula (I) (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name: NK ester AM-30G) (ratio of 0.008 moles with respect to 1 mole of acrylonitrile), 767 mg of potassium persulfate corresponding to a polymerization initiator (manufactured by Wako Pure Chemical Industries, Ltd.), α-methylstyrene dimer corresponding to a chain transfer agent (manufactured by Wako Pure Chemical Industries, Ltd.), and 450 mL of purified water (manufactured by Wako Pure Chemical Industries, Ltd.) under nitrogen atmosphere. The reaction solution was vigorously stirred at 60° C. for 3 hours and then at 80° C. for 3 hours. After cooling to room temperature (25° C.), the ...

examples 2a to 5a

[0179]A resin for an energy device electrode was synthesized by the method shown in Example 1A except that the composition of the monomer and the polymerization initiator was changed to values shown in Table 1.

[0180]The compositions and yields of Examples 1A-5A are summarized in Table 1.

TABLE 1MonomerPolymerizationcomposition (Amount used g)initiator (g)Methoxy triethylenePotassiumYieldAcrylonitrileglycol acrylatepersulfate(%)Example41.81.40.77981AExample40.42.80.77982AExample39.04.20.77973AExample37.65.60.77964AExample36.27.00.77965A

example 1b

[0181]In a 0.5-liter separable flask equipped with a stirrer, a thermometer, and a condenser, under nitrogen atmosphere, 400 mL of purified water (manufactured by Wako Pure Chemical Industries, Ltd.) was added, and 347 mg of ammonium persulfate corresponding to a polymerization initiator (manufactured by Wako Pure Chemical Industries, Ltd.) was added while stirring at 73° C. After confirming that the ammonium persulfate had dissolved, a mixed solution of 41.8 g of acrylonitrile corresponding to a nitrile group-containing monomer (manufactured by Wako Pure Chemical Industries, Ltd.) and 1.4 g of methoxytriethylene glycol acrylate corresponding to a monomer represented by Formula (I) (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name: NK ester AM-30G) (ratio of 0.008 moles with respect to 1 mole of acrylonitrile) was dropped over 2 hours. After stirring for 1 hour, 420 mg of ammonium persulfate was added, and the mixture was further stirred for 1 hour. Next, the reaction so...

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Abstract

A resin for an energy device electrode contains a structural unit derived from a nitrile group-containing monomer; and a structural unit derived from a monomer represented by the following Formula (I), wherein the resin does not contain a structural unit that is derived from a carboxy group-containing monomer and that contains a carboxy group, or the resin has a ratio of a structural unit that is derived from a carboxy group-containing monomer and that contains a carboxy group of 0.01 moles or less with respect to 1 mole of the structural unit derived from a nitrile group-containing monomer. In Formula (I), R1 represents a hydrogen atom or a methyl group, R2 represents a hydrogen atom or a monovalent hydrocarbon group, and n represents an integer from 1 to 50.

Description

TECHNICAL FIELD[0001]The present invention relates to a resin for an energy device electrode, a composition for forming an energy device electrode, an energy device electrode, and an energy device.BACKGROUND ART[0002]Lithium ion secondary batteries, which are energy devices having high energy density, are widely used as power sources of portable information terminals such as laptop computers, mobile phones, and Personal Digital Assistants (PDAs).[0003]In such a lithium ion secondary battery, a carbon material having a multilayer structure capable of intercalation (formation of lithium intercalation compound) and release of lithium ions is used as an active material of a negative electrode. As an active material of a positive electrode, lithium-containing metal complex oxide is mainly used. An electrode of a lithium ion secondary battery is prepared by applying a slurry prepared by kneading such an active material, a binder resin, a solvent (N-methyl-2-pyrrolidone, water, or the like...

Claims

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Application Information

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IPC IPC(8): H01M4/62C08F220/44C08F220/18H01M4/13H01M4/525H01M10/0525C08F220/26
CPCH01M4/13H01M10/0525H01M4/525C08F220/44C08F220/18C08F220/26H01M4/622C08F2220/285Y02E60/10H01M4/131C08F220/281C08F220/282C08F301/00C08F220/285C08F220/286
Inventor NAGAI, SHUNSUKEKUZUOKA, HIROKISUZUKI, KENJIOGAWA, NOBUYUKI
Owner SHOWA DENKO MATERIALS CO LTD