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Composition for forming undercoat layer of energy storage device

A technology of primer coating and composition, applied in the direction of coating, carbon compound, electrical components, etc., can solve the problems of lack of clear understanding and low resistance of batteries, and achieve the effect of low resistance and inhibiting the rise of resistance.

Pending Publication Date: 2020-11-03
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In this regard, it is not clear whether the use of a certain conductive carbon material can reduce the resistance of the battery and suppress the increase in resistance.

Method used

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  • Composition for forming undercoat layer of energy storage device
  • Composition for forming undercoat layer of energy storage device
  • Composition for forming undercoat layer of energy storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0257] EPOCROS WS-300 (manufactured by Nippon Shokubai Co., Ltd.), which is an aqueous solution containing an oxazoline polymer as a dispersant, has a solid content concentration of 10% by mass and a weight average molecular weight of 1.2×10 5 , oxazoline group amount 7.7mmol / g) 5.0g, pure water 37.15g and 2-propanol (manufactured by Junsei Chemical Co., Ltd., reagent special grade) 7.35g were mixed, and TC-2010 ( Toda Kogyo Co., Ltd. multilayer CNT, G / D ratio: 0.997) 0.5 g. The obtained mixture was subjected to ultrasonic treatment for 30 minutes using a probe-type ultrasonic irradiation device to prepare a dispersion liquid in which CNTs were uniformly dispersed. Mixed into it as containing polyammonium acrylate (PAA-NH 4 ) of an aqueous solution of ARON A-30 (Toagosei Co., Ltd., solid content concentration 31.6% by mass) 1.2 g, 41.35 g of pure water, and 7.44 g of 2-propanol (manufactured by Junsei Chemical Co., Ltd., reagent grade) were prepared. Primer liquid (1.38 mass...

Embodiment 1-2

[0259] A primer liquid was prepared in the same manner as in Example 1-1 except that the CNT was changed to AMC (manufactured by Ube Industries, Ltd., multilayer CNT, G / D ratio: 0.819).

Embodiment 1-3

[0261] A primer liquid was prepared in the same manner as in Example 1-1 except that the CNT was changed to VGCF-X (manufactured by Showa Denko Co., Ltd., multilayer CNT, G / D ratio: 0.698).

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Abstract

Provided is a composition for forming an undercoat layer of an energy storage device, the composition comprising carbon nanotubes, a carbon nanotube dispersant, and a solvent, and the G / D band ratio of the carbon nanotubes being 0.680 to 2.900. This composition makes it possible to provide an undercoat layer that exhibits the effects of reducing resistance and suppressing an increase in resistance.

Description

technical field [0001] The present invention relates to a composition for forming an undercoat layer of an energy storage device. Background technique [0002] In recent years, the development of high-performance batteries and secondary batteries that can be used repeatedly by charging have been actively carried out in response to the demand for smaller, lighter, and more functional portable electronic devices such as smart phones, digital cameras, and portable game consoles. The demand has greatly expanded. [0003] Among them, the lithium-ion secondary battery is currently the secondary battery most intensively developed because of its high energy density, high voltage, and no memory effect during charging and discharging. [0004] In addition, in response to environmental problems in recent years, development of electric vehicles has been actively carried out, and higher performance has been demanded for secondary batteries serving as power sources. [0005] Lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04C09D5/00C09D5/24C09D7/20C09D7/61C09D7/65C09D201/00H01B1/24H01G11/28H01M4/02H01M4/13H01M4/66
CPCC09D5/24C09D7/65C09D7/20C09D7/61H01B1/24H01M4/13Y02E60/10H01G11/70H01G11/68H01G11/28H01G11/36H01G11/38H01M4/661H01M4/663H01M10/0525H01M4/667C08K3/041C01B32/174
Inventor 畑中辰也境田康志松原功达
Owner NISSAN CHEM IND LTD
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