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Composite particle for electrochemical element electrode

A technology of electrochemical components and composite particles, which is applied in the direction of electrical components, battery electrodes, hybrid capacitor electrodes, etc., can solve the problems such as no record of composite particles, and achieve the effect of excellent flexibility and sufficient adhesion

Active Publication Date: 2016-07-20
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it relates to the manufacturing method of the above-mentioned coated electrode, which is different from powder molding using composite particles, there is no description on improving the strength of composite particles.

Method used

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  • Composite particle for electrochemical element electrode
  • Composite particle for electrochemical element electrode

Examples

Experimental program
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Embodiment 1

[0179] (Manufacture of particulate binder resin (B))

[0180] Add 47 parts of styrene, 50 parts of 1,3-butadiene, 3 parts of methacrylic acid, 4 parts of sodium dodecylbenzenesulfonate, and 150 parts of ion-exchanged water into a 5MPa pressure-resistant container with a stirrer, as After sufficiently stirring 0.4 parts of t-dodecylmercaptan as a chain transfer agent and 0.5 parts of potassium persulfate as a polymerization initiator, they were heated to 50° C. to initiate polymerization. Cooling was performed when the polymerization conversion ratio reached 96% to terminate the reaction to obtain a particulate binder resin (B) (styrene-butadiene copolymer; hereinafter also abbreviated as "SBR").

[0181] (Manufacture of slurry for composite particles)

[0182] 91.0 parts of artificial graphite (average particle size: 24.5 μm, graphite interlayer distance (interplanar distance (d value) of (002) plane measured by X-ray diffraction method): 0.354 nm) and SiC6 .6 parts, the abo...

Embodiment 2

[0194] Except that 97.6 parts of artificial graphite was used as the negative electrode active material (A), the manufacture of the slurry for composite particles, the manufacture of composite particles, the manufacture of negative electrodes for lithium ion secondary batteries, and the manufacture of lithium ion secondary batteries were carried out in the same manner as in Example 1. Manufacture of ion secondary batteries.

Embodiment 3

[0196] In addition to using a 1.0% aqueous dispersion of cellulose nanofibers (raw material: conifer, degree of fibrillation: high, average degree of polymerization: 300; manufactured by Chuetsu Pulp Co., Ltd.) as the water-insoluble polysaccharide polymer fiber (D), and the implementation In Example 1, the production of the slurry for composite particles, the production of composite particles, the production of the negative electrode for lithium ion secondary batteries, and the production of lithium ion secondary batteries were performed in the same manner.

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Abstract

The invention relates to a composite particle for electrochemical element electrodes, the composite particle including a negative electrode active material (A), a particulate binder resin (B), a water-soluble polymer (C), and non-water-soluble polysaccharide polymer fibers (D). The water-soluble polymer (C) and the non-water-soluble polysaccharide polymer fibers (D) are included at a weight ratio of (C) / (D)=0.2-18.

Description

technical field [0001] The present invention relates to composite particles for electrochemical element electrodes. Background technique [0002] Electrochemical devices such as lithium-ion secondary batteries, electric double-layer capacitors, and lithium-ion capacitors are small, lightweight, have high energy density, and can be repeatedly charged and discharged. The demand for these features is rapidly expanding. Lithium-ion secondary batteries have been used in mobile fields such as mobile phones and notebook personal computers because of their high energy density. On the other hand, since electric double layer capacitors can be quickly charged and discharged, they are expected to be used as auxiliary power sources for electric vehicles and the like in addition to being used as small power sources for backup storage such as personal computers. Furthermore, as for lithium ion capacitors that effectively utilize the advantages of lithium ion secondary batteries and electr...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01G11/06H01G11/38H01M4/62
CPCH01G11/06H01G11/38H01G11/46H01G11/50H01M4/36H01M4/622Y02E60/10H01M4/139Y02E60/13
Inventor 增田梓
Owner ZEON CORP