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Composite particles for electrodes of electrochemical devices

A technology for electrochemical components and composite particles, which is applied to electrical components, battery electrodes, hybrid capacitor electrodes, etc. It can solve the problem of undocumented composite particles, and achieve the effects of excellent uniformity, excellent flexibility and sufficient strength.

Active Publication Date: 2019-06-11
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 particles for electrodes of electrochemical devices
  • Composite particles for electrodes of electrochemical devices

Examples

Experimental program
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Effect test

Embodiment 1

[0180] (Manufacture of particulate binder resin (C))

[0181] 130 parts of ion-exchanged water was added to a separable 1-liter SUS flask equipped with a stirrer, a reflux condenser, and a thermometer, and 0.8 parts of ammonium persulfate and 10 parts of ion-exchanged water were added as a polymerization initiator, and heated to 80°C.

[0182] In addition, 76 parts of 2-ethylhexyl acrylate as (meth)acrylate monomer, 20 parts of acrylonitrile as α, β-unsaturated nitrile monomer, 20 parts of acrylonitrile as 4.0 parts of itaconic acid as a functional group monomer, 2.0 parts of sodium dodecylbenzenesulfonate as an emulsifier, and 377 parts of ion-exchanged water were sufficiently stirred to prepare an emulsion.

[0183] The emulsion obtained above was continuously added to the separable flask over 3 hours. After further reacting for 2 hours, cooling was performed to terminate the reaction. 10% of ammonia water was added there, and pH was adjusted to 7.5, and the aqueous dispe...

Embodiment 2

[0201] LiNiO is used as the positive electrode active material (A) 2 Production of slurry for composite particles, production of composite particles, production of positive electrodes for lithium ion secondary batteries, and production of lithium ion secondary batteries were performed in the same manner as in Example 1 except that 90.8 parts were used.

Embodiment 3

[0203] As the positive electrode active material (A), 90.8 parts of nickel-manganese-cobaltate lithium (NMC (111)) having a layered structure were used, except that, in the same manner as in Example 1, the preparation and compounding of the slurry for composite particles were carried out. Production of particles, production of positive electrodes for lithium-ion secondary batteries, production of lithium-ion secondary batteries.

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Abstract

The present invention relates to a composite particle for an electrode of an electrochemical element, which comprises a positive electrode active material (A), a conductive agent (B), a particulate binder resin (C), a water-soluble polymer (D) and a water-insoluble polysaccharide high The molecular fiber (E), wherein the content ratio of the water-soluble polymer (D) and the water-insoluble polysaccharide polymer fiber (E) is (D) / (E)=0.25-7.0 by weight ratio.

Description

technical field [0001] The present invention relates to composite particles for electrochemical element electrodes. Background technique [0002] Electrochemical components 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 effective use of these characteristics has rapidly expanded their demand. Lithium-ion secondary batteries have been used in the mobile field such as mobile phones and notebook personal computers because of their high energy density. On the other hand, electric double layer capacitors have been used as small power sources for backup storage of personal computers and the like because they can be charged and discharged quickly, and application of electric double layer capacitors as auxiliary power sources for electric vehicles and the like is also expected. Furthermore, as for lithium ion capacitors that effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01G11/24H01G11/30H01M4/62
CPCH01G11/24H01G11/38H01G11/40H01M4/364H01M4/622H01M10/052H01M2004/021Y02E60/10Y02T10/70H01G11/30H01M4/36Y02E60/13
Inventor 增田梓石井琢也
Owner ZEON CORP