Conductive material paste for secondary battery electrode, method for producing slurry for secondary battery cathode, method for producing secondary battery cathode, and secondary battery

A secondary battery and conductive material technology, applied in secondary batteries, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of the influence of the electrical characteristics of the secondary battery, the influence of the slurry properties of the electrodes, etc., and achieve excellent electrical characteristics , excellent dispersion stability, and improved electrical properties

Active Publication Date: 2016-07-27
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in general, the compounding of the slurry for electrodes and its production process will affect the properties of the slurry for electrodes obtained.
In addition, the properties of the slurry for electrodes affect the electrical characteristics of a secondary battery having an electrode compound layer formed using such a slurry for electrodes.

Method used

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  • Conductive material paste for secondary battery electrode, method for producing slurry for secondary battery cathode, method for producing secondary battery cathode, and secondary battery
  • Conductive material paste for secondary battery electrode, method for producing slurry for secondary battery cathode, method for producing secondary battery cathode, and secondary battery
  • Conductive material paste for secondary battery electrode, method for producing slurry for secondary battery cathode, method for producing secondary battery cathode, and secondary battery

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preparation example Construction

[0116] [Preparation method of adhesive A]

[0117] The method for producing the binder A is not particularly limited, and can be produced, for example, by polymerizing a monomer composition containing the above monomers to obtain a polymer, and optionally hydrogenating the obtained polymer.

[0118] Here, in this specification, the content ratio of each monomer in the monomer composition can be determined based on the content ratio of each monomer unit and structural unit (repeating unit) in the adhesive A.

[0119] The polymerization method is not particularly limited, and any method of solution polymerization, suspension polymerization, bulk polymerization, emulsion polymerization, etc. can be used. In each polymerization method, known emulsifiers and polymerization initiators can be used as necessary.

[0120] The hydrogenation method is not particularly limited, and a conventional method using a catalyst can be used (for example, refer to International Publication No. 201...

Embodiment 1-1

[0331]

[0332] In an autoclave with a stirrer, 240 parts of ion-exchanged water, 2.5 parts of sodium alkylbenzene sulfonate as an emulsifier, 35 parts of n-butyl acrylate (BA) as a (meth)acrylate monomer, and After 20 parts of acrylonitrile (AN) as a nitrile group-containing monomer, the inside of the bottle was replaced with nitrogen, and then 45 parts of 1,3-butadiene (BD) as a conjugated diene monomer (above from BA, AN and BD constitute a monomer composition), 0.25 part of ammonium persulfate as a polymerization initiator was added, and the polymerization reaction was carried out at a reaction temperature of 40° C. to obtain a conjugated diene monomer unit, a (meth)acrylate monomer unit, and a Monomer units and polymers containing nitrile group monomer units. The polymerization conversion rate was 85%.

[0333] A solution of 400 ml (total solid content 48 g) in which ion-exchanged water was added to the obtained polymer to adjust the total solid content concentration t...

Embodiment 1-2

[0339] In producing the adhesive, adhesive A2 was produced in the same manner as in Example 1-1, except that BD49 parts, BA27 parts, and AN24 parts were used as monomer compositions. Furthermore, except having used binder A2 instead of binder A1, it carried out similarly to Example 1-1, and produced the electrically conductive material paste of 10% of solid content concentration. The binder adsorption amount of the conductive material of the obtained conductive material paste was 390 mg / g, and the viscosity was 4000 mPa·s. The dispersion stability [Evaluation Method 1] and potential stability of the obtained conductive material paste were evaluated. The results are shown in Table 1.

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Abstract

The objective of the present invention is to provide a conductive material paste that is for a secondary battery electrode and that can form an electrode having superior electrical potential stability and superior dispersion stability. The conductive material paste for a secondary battery electrode contains a conductive material and a binder (A), the binder (A) contains an alkylene structural unit and/or a (meth)acrylate ester monomer unit, and the binder adsorption amount of the conductive material is 100-600 mg/g inclusive.

Description

technical field [0001] The present invention relates to a conductive material paste for a secondary battery electrode, a method for producing a slurry for a positive electrode of a secondary battery, a method for producing a positive electrode for a secondary battery, and a secondary battery. Background technique [0002] Secondary batteries, especially lithium-ion secondary batteries, are small, lightweight, have high energy density, and have characteristics such as being capable of repeated charging and discharging, and thus have been used in a wide range of applications. In particular, in recent years, lithium-ion secondary batteries have attracted attention as energy sources for electric vehicles (EV) and hybrid vehicles (HEV), and higher performance has been demanded. Therefore, in recent years, in order to achieve further performance enhancement of secondary batteries such as lithium ion secondary batteries, studies have been conducted on the improvement of battery com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/13H01M4/62H01M10/052H01M10/0566
CPCH01M4/13H01M4/139H01M10/052H01M10/0566H01M4/621Y02E60/10Y02P70/50Y02T10/70
Inventor 福峯真弓高桥直树片桐麻贵
Owner ZEON CORP
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