Supercharge Your Innovation With Domain-Expert AI Agents!

Binder composition for electrode, coating composition for electrode, electrode for power storage device, and power storage device

A technology for storage devices and compositions, applied in the direction of non-aqueous electrolyte batteries, negative electrodes, battery electrodes, etc., can solve problems such as peeling off, difficulty in maintaining electrode flexibility, dispersibility of electrode materials, and difficult realization of rheological control. Achieve the effects of high adhesion, high discharge performance and cycle stability

Pending Publication Date: 2021-11-26
DAI ICHI KOGYO SEIYAKU CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, electrodes using these high-strength binders have the characteristic that the electrode will not break even if the volume of the active material changes, but it is difficult to maintain the flexibility of the electrode, and there is a problem that it is easy to cause peeling during electrode processing.
In addition, in general, the dispersibility and rheology control of electrode materials are difficult to achieve only with acrylic polymers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Binder composition for electrode, coating composition for electrode, electrode for power storage device, and power storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Next, examples will be described together with comparative examples. However, the present invention is not limited to these Examples. In addition, unless otherwise specified, "%" in an example means a mass basis.

[0090] Synthesis of Polyurethane Aqueous Dispersion

Synthetic example 1-1

[0091] (Synthesis Example 1-1) Synthesis of Aqueous Polyurethane Dispersion A-1

[0092] A polybutadiene polyol (manufactured by Idemitsu Kosan Co., Ltd., PolybdR-45HT, average hydroxyl value 46.5 mgKOH / g, active hydrogen number 2.32 ) 71.3 parts by mass, dimethylolpropionic acid (active hydrogen number 2) 4.2 parts by mass, 24.5 parts by mass of dicyclohexylmethane diisocyanate, 100 parts by mass of methyl ethyl ketone, reacted at 75°C for 4 hours to obtain free A methyl ethyl ketone solution of a urethane prepolymer having an isocyanate group content of 2.5% relative to the non-volatile content. This solution was cooled to 45° C., and 1.25 parts by mass of sodium hydroxide was added for neutralization, then 300 parts by mass of water was slowly added, and emulsified dispersion was performed using a homogenizer. Next, an aqueous solution obtained by diluting 1.6 parts by mass of ethylenediamine (active hydrogen number 2) with 100 parts by mass of water was added, and a chain...

Synthetic example 1-2

[0093] (Synthesis Example 1-2) Synthesis of Aqueous Polyurethane Dispersion A-2

[0094]A hydrogenated polybutadiene polyol (manufactured by CREY VALLEY, KRASOL HLBH-P3000, with an average hydroxyl value of 31.0 mgKOH / g and an active hydrogen number of 1.90) 73.9 parts by mass, dimethylolpropionic acid (active hydrogen number is 2) 4.6 parts by mass, 21.5 parts by mass of dicyclohexylmethane diisocyanate, 100 parts by mass of methyl ethyl ketone, reacted at 75°C for 4 hours, A methyl ethyl ketone solution of a urethane prepolymer having a free isocyanate group content of 2.1% based on the non-volatile content was obtained. This solution was cooled to 45° C., 3.5 parts by mass of triethylamine was added for neutralization, and then 300 parts by mass of water was slowly added to emulsify and disperse using a homogenizer. Next, an aqueous solution obtained by diluting 1.5 parts by mass of diethylenetriamine (active hydrogen number 3) with 100 parts by mass of water was added, an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
acid valueaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention provides a binder composition for an electrode from which an electrode exhibiting high durability is obtained, even when an active material with a large change in volume is used; a coating liquid composition which is for an electrode and contains the same; an electrode which is for a power storage device, and contains a solid content thereof in an electrode mixture layer; and a power storage device comprising the electrode for a power storage device. The binder composition for an electrode is characterized by containing (A) a polyurethane, (B) a fibrous nanocarbon material having an average fiber length of at least 0.5 [mu]m, and (c) water, wherein the polyurethane is obtained by reacting (a) a polyisocyanate, (b) a polyol, (c) a compound having at least one active hydrogen group and a hydrophilic group, and (d) a chain extender, wherein (b) contains an olefinic polyol having at least 1.5 active hydrogen groups and / or a carbonate diol having less than 6 carbon atoms between the carbonate bond chains.

Description

technical field [0001] The present invention relates to a binder composition for an electrode, a coating composition for an electrode containing the binder composition for an electrode, an electrode for an electrical storage device containing the solid content of the coating composition for an electrode in an electrode compound material layer, and An electricity storage device including the electrode. Background technique [0002] In recent years, power storage devices with high voltage and high energy density have been demanded as power sources for driving electronic devices. In particular, lithium-ion secondary batteries, lithium-ion capacitors, and the like are expected as high-voltage, high-energy-density power storage devices. Such an electrode used in an electricity storage device is generally manufactured by applying a mixture of electrode active material particles, conductive material particles, and a binder to the surface of a current collector and drying it. Exam...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139H01M4/62H01G11/38
CPCH01G11/38Y02E60/10H01G11/50H01M4/622H01M4/625H01M4/621Y02T10/70H01M4/62H01M4/133H01M4/134H01M4/1393H01M4/1395H01M4/139H01M4/13H01M10/052H01G11/06B82Y30/00B82Y40/00C08G18/0876C08G18/6204C08G18/69H01M10/0525H01M2004/027H01M2300/002
Inventor 祖父江绫乃渡边聪哉齐藤恭辉
Owner DAI ICHI KOGYO SEIYAKU CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com