Conductive adhesive composition, collector with adhesive layer, and electrochemical element electrode

An adhesive layer, conductivity technology, applied in conductive adhesives, non-aqueous electrolyte battery electrodes, electrical components and other directions, can solve the problems of high internal resistance, high electrolyte viscosity, high contact resistance, etc., to improve high temperature Effect of preservation characteristics, high temperature cycle characteristics and low temperature output characteristics

Active Publication Date: 2014-06-25
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the other hand, there are problems in that the contact resistance between the current collector and the electrode active material layer is large, the electrode strength is low, and the internal resistance is large.
In addition, these electrochemical devices can increase the operating voltage and energy density by using an organic electrolyte solution, but on the other hand, there is a problem of high internal resistance due to the high viscosity of the electrolyte solution.

Method used

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  • Conductive adhesive composition, collector with adhesive layer, and electrochemical element electrode
  • Conductive adhesive composition, collector with adhesive layer, and electrochemical element electrode
  • Conductive adhesive composition, collector with adhesive layer, and electrochemical element electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0210] (manufacturing of water-soluble polymers)

[0211] Put 59 parts of ethyl acrylate, 32.5 parts of methacrylic acid, 7.5 parts of 2,2,2-trifluoroethyl methacrylate, ethylene dimethacrylate (cross-linked monomer) 1 part, 1.5 parts of polyoxyalkylene alkenyl ether ammonium sulfate (Latemul PD-104, manufactured by Kao Corporation) as an emulsifier, 150 parts of ion-exchanged water, and 0.5 parts of potassium persulfate as a polymerization initiator After fully stirring, heat to 60°C to initiate polymerization. When the polymerization conversion rate was 96%, cooling was performed to stop the reaction, and an aqueous dispersion liquid containing a water-soluble polymer was obtained.

[0212] 10% ammonia water was added to the aqueous dispersion containing the above-mentioned water-soluble polymer to adjust the pH to 8 to obtain the desired aqueous solution of the water-soluble polymer. The viscosity of a 1% aqueous solution of the water-soluble polymer at pH 12 is 50 mPa·s....

Embodiment 2

[0229] In Example 1 (manufacture of a conductive adhesive composition), it was the same as that of Example 1 except that only 100 parts of spherical graphite was used as a conductive carbon material. The results are shown in Table 1.

Embodiment 3

[0231] In Example 1 (manufacture of an electroconductive adhesive composition), it was the same as Example 1 except having used only 100 parts of carbon blacks as an electroconductive carbon material. The results are shown in Table 1.

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Abstract

To provide a conductive adhesive composition which is used for the purpose of forming a conductive adhesive layer that is interposed between a collector and an electrode active material layer, the conductive adhesive layer capable of preventing decomposition of the electrolyte solution by reducing residual water and able to be formed as a thinner layer, while still providing sufficient adhesion between the collector and the electrode active material layer. A conductive adhesive composition of the present invention contains a conductive carbon material, a water-soluble polymer and a binder, and is characterized in that the water-soluble polymer is a copolymer that contains an ethylenically unsaturated carboxylic acid monomer unit, a (meth) acrylic acid ester monomer unit and a fluorine-containing (meth)acrylic acid ester monomer unit.

Description

technical field [0001] The present invention relates to a conductive adhesive composition, in particular to a conductive adhesive composition suitable for forming uniform and good adhesion on the surface of a current collector constituting an electrode of an electrochemical element such as a lithium ion secondary battery or a lithium ion capacitor. Adhesive composition for a conductive adhesive layer. In addition, the present invention relates to a current collector with an adhesive layer having a conductive adhesive layer formed from the adhesive composition, and a conductive adhesive layer containing The electrochemical element electrode of the electrode active material layer of the electrode active material. Background technique [0002] The demand for electrochemical devices such as lithium-ion secondary batteries, electric double-layer capacitors, and lithium-ion capacitors is rapidly expanding, taking advantage of the characteristics of small size, light weight, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J125/10C09J147/00C09J9/02H01B1/24H01G11/68H01G11/06H01M4/66
CPCC09J9/02C09J133/02C09J133/08C09J133/04C08K3/04H01M4/66H01M4/667H01M4/661H01M4/13H01B1/24C09J133/16H01M4/668C09J11/04C09J11/06Y02E60/10
Inventor 佐佐木智一
Owner ZEON CORP
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