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

A technology for electrochemical components and adhesive layers, which is applied in the field of adhesive compositions for conductive adhesive layers and electrodes for electrochemical components, can solve the problems of large internal resistance and high viscosity of electrolyte, and achieve high durability , high electrode strength, strength and smooth surface state

Inactive Publication Date: 2014-04-09
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Electrochemical components can increase the operating voltage and energy density by using an organic electrolyte, but on the other hand, there is a problem of high internal resistance due to the high viscosity of the electrolyte

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 2～6

[0226] (Manufacture of conductive adhesive composition)

[0227] A carbon material (DENKA BLACK) was added to an aqueous solution obtained by dissolving a dispersant (polyvinyl alcohol) in ion-exchanged water, and after being dispersed using a bead mill at high speed for 60 minutes, the dispersion of a granular copolymer was further added, Similarly, it was rotated at a low speed for 5 minutes to disperse, and a conductive adhesive composition was prepared so as to have the solid content ratio described in Table 1. (solid content concentration 18-20%)

[0228] (Formation of conductive adhesive layer)

[0229] Coat the above-mentioned conductive adhesive on the aluminum current collector with a roll bar by casting method, apply it on both sides of the current collector at a forming speed of 20m / min, dry at 60°C for 1 minute, continue Drying was performed at 120° C. for 2 minutes to form a conductive adhesive layer with a thickness of 1.2 μm.

[0230] (production of electrode...

Embodiment 6～9

[0238] In Examples 6 to 9, an aqueous solution of an isothiazoline compound was further added to a solution obtained by dispersing a dispersant, a carbon material, and a granular copolymer, and stirred with a disperser for 30 minutes. Ratio Except having prepared a conductive adhesive composition, it carried out similarly to Example 1, and produced the electrode for lithium ion batteries, and a lithium ion battery. Table 1 shows the measurement results of each characteristic of the lithium ion battery.

[0239] In addition, the aqueous solution of the isothiazoline compound used in Examples 6, 8, and 9 was ACTICIDE (registered trademark) MBS (2-methyl-4-isothiazolin-3-one (MIT) / 1,2-Benzo-4-isothiazolin-3-one (BIT) = 50 / 50 in 5% aqueous solution).

[0240] Alternatively, ACTICIDE (registered trademark) 5008 (5-chloro-2-methyl-4-isothiazolin-3-one (CIT) / 2-methyl-4-isothiazolin-3-one (CIT) manufactured by So Japan Ketone (MIT)=50 / 50 5% aqueous solution) instead of ACTICIDE (re...

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Abstract

The invention provides a conductive adhesive composition for an electrochemical element electrode and used in forming a conductive adhesive layer that is highly uniform and is interposed between a collector and an electrode composition layer, being able to contribute to increased adhesion between the two. The conductive adhesive composition for an electrochemical element electrode is characterized by containing: conductive carbon; a particulate copolymer (A) containing a dibasic acid monomer unit; a particulate copolymer (B) containing an ethylenically unsaturated carboxylic acid amide derivative unit; and a dispersing agent.

Description

technical field [0001] The invention relates to a conductive adhesive composition used for electrodes of electrochemical elements, in particular to a conductive adhesive suitable for forming uniform and good adhesion on the surface of a collector of a lithium-ion secondary battery Adhesive composition for the agent layer. In addition, the present invention relates to a current collector with an adhesive layer having a conductive adhesive layer formed from the above adhesive composition, and a conductive adhesive layer comprising Electrochemical element electrode of the electrode composition layer of the electrode active material. Background technique [0002] Small, lightweight, high-energy-density electrochemical devices that can be repeatedly charged and discharged, especially lithium-ion batteries, are rapidly expanding in demand due to the utilization of their characteristics. In addition, electrochemical devices represented by lithium-ion batteries are expected to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/13H01M4/66
CPCH01M4/0404H01G11/22H01M4/668H01M4/663H01G11/66H01M4/0471H01M4/667Y02E60/122H01M4/133Y02E60/10
Inventor 前田耕一郎吉田直树
Owner ZEON CORP
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