Coating liquid, coating liquid for manufacturing electrode plate, undercoating agent, and use thereof

A coating liquid and electrode plate technology, which is applied in the direction of electrode manufacturing, electrode collector coating, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of insufficient adhesion and flexibility of collectors, active material layer Eliminate problems such as peeling and high contact resistance, achieve excellent adhesion and electrolyte resistance, and improve contact resistance

Inactive Publication Date: 2011-05-04
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Formation of a protective film on the surface of metal materials such as the above-mentioned aluminum materials by coating various resin solutions has been performed. Although the formed film has excellent adhesion to the metal surface, the durability of the film to organic solvents is insufficient. The problem
[0007] In addition, the electrode plates of batteries and capacitors obtained by applying the above-mentioned active material coating liquid coate

Method used

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  • Coating liquid, coating liquid for manufacturing electrode plate, undercoating agent, and use thereof
  • Coating liquid, coating liquid for manufacturing electrode plate, undercoating agent, and use thereof
  • Coating liquid, coating liquid for manufacturing electrode plate, undercoating agent, and use thereof

Examples

Experimental program
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preparation example Construction

[0065] A specific method for preparing the electrode plate coating liquid of the present invention will be described. First, a powdery active material appropriately selected from the materials listed above and a powdery conductive additive used if necessary are added to a coating solution containing a hydroxyl group-containing resin and an organic acid and / or its derivatives in the above ratio. , using conventionally known dispersers such as homogenizers, ball mills, sand mills, and roll mills, or planetary mixers (planetary mixers) for mixing and dispersing, thereby preparing the electrode plate of the present invention. liquid.

[0066] The method for producing an electrode plate of the present invention is characterized by using the above-mentioned coating liquid for an electrode plate of the present invention. As the current collector used to manufacture the electrode plate, for example, as the positive electrode current collector, aluminum, tantalum, niobium, titanium, h...

Embodiment

[0097] Next, an Example and a comparative example are given, and this invention is demonstrated more concretely. In addition, this invention is not limited to these Examples. "Part" or "%" in the text is a mass basis unless otherwise specified.

[0098] [Example (I) using polyvinyl acetal resin]

[0099]

[0100] The composition of each polyvinyl acetal resin solution used in the Example and the comparative example is shown in Table I-1. In addition, regarding the polar solvent used in each polyvinyl acetal resin solution, N-methyl-2-pyrrolidone is abbreviated as NMP, N-ethyl-2-pyrrolidone is abbreviated as NEP, N,N-dimethylformaldehyde Amide is abbreviated as DMF, dimethylsulfoxide is abbreviated as DMSO, N,N-dimethylacetamide is abbreviated as DMAc, and 1,3-dimethyl-2-imidazolinone is abbreviated as DMI.

[0101]

[0102] Disperse polyvinyl butyral resin in 93 parts of NMP [manufactured by Denki Kagaku Kogyo Co., Ltd., DENKA BUTYRAL #4000-2 (the amount of residual hydro...

Embodiment I-1

[0113] Embodiment I-1 (coating solution, electrode plate)

[0114] The positive electrode coating liquid containing the positive electrode active material used in this example was produced by the following method. As the material of the positive electrode coating liquid, 90 parts of LiCoO having a particle size of 1 to 100 μm 2 Powder, 5 parts of acetylene black as a conductive auxiliary agent, 60 parts of the solution of the example I-1 of the above-mentioned Table I-1 as a binder, are stirred and mixed for 120 minutes by a planetary mixer at a speed of 60 rpm, Thus, a slurry-like positive electrode coating liquid containing a positive electrode active material was obtained.

[0115] Using the positive electrode coating solution obtained above, the current collector made of aluminum foil with a thickness of 20 μm is used as a substrate, and after the positive electrode coating solution is applied on one side of the substrate by a comma roll coater, the Dry in an oven at 110...

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Abstract

Disclosed is a coating liquid characterized by comprising a hydroxyl group-containing resin, an organic acid and/or a derivative thereof contained in a polar solvent, the hydroxyl group-containing resin being at least one resin selected from (1) polyvinyl acetal resins, (2) ethylene-vinyl alcohol copolymers, (3) unmodified and/or modified polyvinyl alcohols, and (4) cyanoethyl group-containing polymers. Also disclosed are a coating liquid for manufacturing an electrode plate, an undercoating agent, and use thereof. The coating liquid capable of forming a film, which has excellent adhesion and solvent resistance, on the surface of a metal material such as an aluminum material can be provided. Furthermore, a coating liquid for manufacturing an electrode plate for a battery or a polarizing electrode plate for a capacitor comprising an active material layer having excellent adhesion and electrolyte resistance to a current collector formed of, for example, an aluminum foil or a copper foil and having an improved contact resistance to the current collector, an undercoating agent, an electrode plate; a method for manufacturing the electrode plate, a battery, and a capacitor can be provided.

Description

technical field [0001] The present invention relates to a coating solution capable of forming a film having excellent solvent resistance on a metal plate such as an aluminum plate, and its use in the manufacture of a non-aqueous electrolyte secondary battery typified by a lithium ion secondary battery (hereinafter sometimes simply referred to as a "battery") Coating solution for electrode plates, electrode plates for capacitors typified by electric double layer capacitors or lithium ion capacitors (hereinafter sometimes simply referred to as "capacitors"), primer, electrode plates, manufacturing methods thereof, batteries and capacitors. Background technique [0002] In the past, in order to protect the surface of metals such as aluminum foil, aluminum sheet, and aluminum plate, a protective film was formed on their surface. In addition, in recent years, electronic equipment and communication equipment have been rapidly reduced in size and weight. The demand for miniaturizat...

Claims

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Application Information

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IPC IPC(8): C09D201/02C09D5/00C09D5/24H01G9/058H01M4/02H01M4/04H01M4/62H01M4/66H01G11/26H01G11/38H01G11/48H01G11/50H01M4/13H01M4/139H01M10/052H01M10/0566
CPCC09D5/002C09D5/24H01G11/38H01M4/625H01M4/661H01M4/667H01G11/26H01G11/48H01G11/50H01M4/139Y02E60/10Y02E60/13Y02P70/50C08L1/26C08L3/08C08L5/00C08L29/04C08L71/00H01G11/86H01M4/0404H01M4/0471H01M4/622
Inventor 山南隆德土田真也小林诚幸青柳真一郎
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD
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