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Acrylonitrile-based fiber for electrodes, electrode containing this fiber, and lead-acid battery having this electrode

An acrylonitrile-based and fiber technology, applied in lead-acid batteries, lead-acid battery electrodes, battery electrodes, etc., can solve problems such as impracticality and battery capacity reduction, and achieve battery capacity improvement, wettability improvement, and high acid resistance. Effect

Active Publication Date: 2017-12-01
JAPAN EXLAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, although an initial improvement in battery capacity can be seen, there is a problem that the hydrophilic polymer layer is preferentially decomposed due to contact with acid over time, and the battery capacity is reduced, so it is not practical.

Method used

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  • Acrylonitrile-based fiber for electrodes, electrode containing this fiber, and lead-acid battery having this electrode
  • Acrylonitrile-based fiber for electrodes, electrode containing this fiber, and lead-acid battery having this electrode
  • Acrylonitrile-based fiber for electrodes, electrode containing this fiber, and lead-acid battery having this electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0064] 90 parts by weight of acrylonitrile, 9.7 parts by weight of methyl acrylate, and 0.3 parts by weight of sodium methallylsulfonate were suspended-polymerized to prepare an acrylonitrile-based polymer. Separately, 27.5 parts by weight of acrylonitrile and 72.5 parts by weight of methoxypolyethylene glycol (30 mol) methacrylate were suspended-polymerized to obtain an acrylonitrile-based hydrophilic resin A. The water swelling degree of this hydrophilic resin was 30 g / g.

[0065] A spinning dope was prepared by dissolving 97 parts by weight of the aforementioned acrylonitrile-based polymer in 900 parts by weight of a 50% aqueous solution of sodium thiocyanate, and then adding and mixing 3 parts by weight of the aforementioned acrylonitrile-based hydrophilic resin A. The spinning dope was spun, and the acrylic fiber A of Example 1 was produced through the steps of coagulation, water washing, and stretching. The volume resistivity value of this acrylic fiber is 0.07×10 9 Ω·...

Embodiment 2

[0067] 58 parts by weight of polyethylene glycol monomethyl ether (number average molecular weight 750) and 12 parts by weight of 2-methacryloyloxyethyl isocyanate were synthesized at 60°C in toluene under a nitrogen atmosphere to obtain a macromolecule monomer. This macromonomer and 30 parts by weight of acrylonitrile were subjected to suspension polymerization to prepare an acrylonitrile-based hydrophilic resin B. The water swelling degree of this hydrophilic resin was 28 g / g.

[0068] Except having used the acrylonitrile-type hydrophilic resin B instead of the acrylonitrile-type hydrophilic resin A, it carried out similarly to Example 1, and produced the acrylonitrile-type fiber B of Example 2. The volume resistivity value of this acrylic fiber is 0.08×10 9 Ω·cm.

Embodiment 3

[0070] Acrylonitrile-based hydrophilic resin C was produced by suspension-polymerizing 70 parts by weight of acrylonitrile and 30 parts by weight of methoxypolyethylene glycol (30 mol) methacrylate. The water swelling degree of this hydrophilic resin was 20 g / g.

[0071] Except having used the acrylonitrile-type hydrophilic resin C instead of the acrylonitrile-type hydrophilic resin A, it carried out similarly to Example 1, and produced the acrylonitrile-type fiber C of Example 3. The volume resistivity value of this acrylic fiber is 0.18×10 9 Ω·cm.

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Abstract

Conventionally, studies have been undertaken into using fibers in which a monomer having a hydrophilic group is graft copolymerized on the surface of a thermoplastic synthetic resin, such fibers serving as a short fiber for reinforcement to be included in the active material layer of electrodes, in order to increase the utilization efficiency of the active material in the electrode and improve the battery capacity. However, in these methods, there was a problem in that, with the passage of time, the hydrophilic polymer layer tended to be preferentially decomposed by contact with acid and thus the battery capacity decreased. The purpose of the present invention is to provide an acrylonitrile-based fiber for electrodes that has excellent acid resistance, such that there are few decomposition issues, even with long-term use, and to provide an electrode containing the fiber and a lead-acid battery having the electrode. The present invention provides an acrylonitrile-based fiber for electrodes, wherein a hydrophilic component is contained within the fiber and the volume resistivity is 1*10<9> [omega]*cm or less.

Description

technical field [0001] The present invention relates to an acrylic fiber for an electrode excellent in acid resistance, an electrode containing the fiber, and a lead acid battery having the electrode. Background technique [0002] Lead storage batteries are widely used as batteries for automobiles, power sources for electric vehicles such as golf carts, and batteries for industrial equipment such as uninterruptible power supply devices because of their low cost and high stability. Usually, the electrode for lead storage batteries is comprised by forming the paste type active material layer on a collector. Such an electrode for a lead storage battery disperses short reinforcing fibers having a length of 1 to 10 mm in a paste-type active material layer in order to prevent the active material from falling off. [0003] Patent Document 1 discloses that by using fibers obtained by graft-copolymerizing a monomer having a hydrophilic group on the surface of a thermoplastic synthet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/14D01F6/54H01M4/62
CPCD01F6/54H01M4/14H01M4/622Y02E60/10C08F220/44C08F220/14H01M4/62H01M10/06C08F20/56
Inventor 山下修阪口胜治
Owner JAPAN EXLAN CO LTD