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Combination for capacitor electrode adhesive

A capacitor electrode and composition technology, which is applied in the direction of hybrid capacitor electrodes, capacitors, hybrid capacitor collectors, etc., can solve problems such as blocking and capacitor electrodes hindering lithium doping, and achieve good electrode activity.

Active Publication Date: 2009-10-07
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

[0012] However, when the slurry with high uniformity by adjusting the viscosity is applied to a porous current collector with a particularly small pore size, the grid of the current collector is blocked, and the resulting capacitor electrode becomes an electrode that prevents lithium doping.

Method used

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  • Combination for capacitor electrode adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] (Polymerization process of fluoropolymer)

[0109] After fully replacing nitrogen in an autoclave with an internal volume of about 6L equipped with an electromagnetic stirrer, add 2.5L of deoxygenated purified water and 25g of ammonium perfluorodecanoate as an emulsifier, and heat up to 60°C while stirring at 350rpm. ℃. Next, add a mixed gas composed of 70% vinylidene fluoride (VDF) and 30% hexafluoropropylene (HFP) until the internal pressure reaches 20kg / cm 2 g. Then, 25 g of a fluorocarbon 113 solution containing 20% ​​of diisopropyl peroxydicarbonate was injected as a polymerization initiator using nitrogen gas to start polymerization. In order to keep the internal pressure during polymerization at 20kg / cm 2 G, press in sequence the mixed gas composed of 60.2% VDF and 39.8% HFP. And, as the polymerization progresses, since the polymerization rate decreases, after 3 hours, the same amount of polymerization initiator as before was injected using nitrogen pressure,...

Embodiment 2

[0115] (Polymerization process of fluoropolymer)

[0116] After fully replacing nitrogen in an autoclave with an internal volume of about 6L equipped with an electromagnetic stirrer, add 2.5L of deoxygenated purified water and 50g of ammonium perfluorodecanoate as an emulsifier, and heat up to 60°C while stirring at 350rpm. ℃. Next, add a mixed gas composed of 70% vinylidene fluoride (VDF) and 30% hexafluoropropylene (HFP) until the internal pressure reaches 20kg / cm 2 g. Then, 25 g of a fluorocarbon 113 solution containing 20% ​​of diisopropyl peroxydicarbonate was injected as a polymerization initiator using nitrogen gas to start polymerization. In order to keep the internal pressure during polymerization at 20kg / cm 2 G, press in sequence the mixed gas composed of 60.2% VDF and 39.8% HFP. And, according to the progress of the polymerization, since the polymerization rate decreased, after 3 hours, the same amount of the polymerization initiator as before was injected using...

Embodiment 3～5

[0120] Except having used the polymerizable monomer as shown in following Table 1, it carried out similarly to Example 1, and obtained the aqueous dispersion medium [3]-[5].

[0121] Table 1 shows the number average particle diameters of the polymer particles [3] to [5] in the obtained aqueous dispersion media [3] to [5].

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Abstract

The invention relates to a combination for capacitor electrode adhesive, capable of providing the serum with excellent electrochemistry stability and adhesive ability of afflux body for forming the electrode and uniformity of coating when the afflux body is porous and the serum unable of blocking the afflux body grid. The combination for capacitor electrode adhesive comprises the polymer combination comprising (a) component: fluorine polymer 5-20 weight% and (b) component: (methyl) acrylics polymer 80-95 weight% containing the structure unit of the monomer represented by the general formula (1), namely granular polymer combination with number-average grain size of 0.1-0.4 Mum, general formula (1) CH2=CR1COOR2, in the general formula (1), R1 represents hydrogen atom or methyl, R2 represents alkyl or cycloalkyl of carbon atom number 1-18.

Description

technical field [0001] The present invention relates to a capacitor electrode binder composition for obtaining capacitor electrodes suitable for capacitors such as electric double layer capacitors and lithium ion capacitors. Background technique [0002] In recent years, along with the dramatic progress in miniaturization and weight reduction of electronic equipment, there has been a high demand for miniaturization and weight reduction of batteries used as power sources. In order to meet such demands, various storage batteries have been developed, such as nickel metal hydride storage batteries, lithium ion storage batteries, etc., which have been put into practical use. [0003] On the other hand, capacitors such as lithium ion capacitors and electric double layer capacitors that do not undergo chemical reactions at electrodes have been developed as power storage devices with high power characteristics for use in vehicles, power tools, and the like. [0004] Since activated...

Claims

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Application Information

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IPC IPC(8): C09J133/06C09J133/12C08J3/11C08J3/05H01G9/058H01G11/38C08L33/16H01G11/06H01G11/22H01G11/68H01G11/70H01G11/86H01M4/62
CPCY02E60/10H01G11/30H01G11/86H01M4/62Y02E60/13
Inventor 茂木武志北口博纪铃木浩史伊藤一聪
Owner 株式会社引能仕材料
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