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Composite electrolytic paper and preparation method thereof

A technology of electrolytic paper and composite nanofibers, which is applied in the direction of papermaking, paper, special paper, etc., can solve the problems of poor consistency, large core package volume, and reduced pressure resistance, and achieve improved mechanical properties, shortened current paths, and loss Reduced effect

Pending Publication Date: 2022-07-29
韶关东阳光电容器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional electrospinning method can directly and efficiently prepare man-made fiber electrolytic paper, but there are the following problems: the solvent electrospinning man-made fiber is disorderly piled up with the fiber, and the binding force is poor, the prepared electrolytic paper is fluffy and the man-made fiber is easy to fall off , so that the pressure resistance performance is reduced; the shedding fibers are easy to block and form foil holes, resulting in a decrease in electrical performance; too fluffy man-made fiber electrolytic paper leads to a large volume of the core package, and the winding tape has no focus, etc.
On the other hand, the binding force between fibers is poor, and the man-made fiber electrolytic paper has a certain plasticity. During the process of assembling the capacitor, due to the action of tension, the electrolytic paper undergoes tensile deformation, and the length, thickness and shape all change. The performance of the capacitor Unstable and poorly consistent

Method used

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  • Composite electrolytic paper and preparation method thereof
  • Composite electrolytic paper and preparation method thereof
  • Composite electrolytic paper and preparation method thereof

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preparation example Construction

[0069] The preparation device and preparation method of the composite electrolytic paper of the present invention will be described in detail below.

[0070] 1. Preparation device of composite electrolytic paper

[0071] like figure 1 As shown, the preparation device for composite electrolytic paper provided by the present invention includes: a positive and high voltage electrode plate 1, a liquid supply device 2, a spinneret 3, a crawler belt 4, a hot pressing roller 5, a cutting roller 6 and a winding roller 7 ;

[0072] in:

[0073] A high-voltage electrostatic field is formed between the positive and high-voltage electrode plate 1 and the crawler belt 4, so as to ensure the continuous process of electrospinning and electrostatic spraying;

[0074] In some embodiments, the liquid supply device 2 is located below the positive and high voltage electrode plate, and the liquid supply device 2 includes a syringe pump 21 and a liquid supply pipe 22. One liquid supply pipe is u...

Embodiment 1

[0117] Taking the preparation process of polyimide nanofiber / polyvinylidene fluoride particle composite electrolytic paper as an example, it mainly includes the following steps:

[0118] The first step, preparation of electrospinning solution: dissolve 4,4'-aminodiphenyl ether and pyromellitic anhydride with a molar ratio of 1:1 in a certain amount of N,N-dimethylformamide respectively , in which the mass proportion of the solute is 15%, and a clarified electrospinning solution is obtained by fully stirring at 25 °C;

[0119] The second step, the preparation of electrostatic spray liquid: add a certain amount of polyvinylidene fluoride powder to a certain amount of N,N-dimethylformamide, in which the solute mass accounts for 3%, and fully stir at 60 ° C to obtain clarification Electrostatic spray liquid;

[0120] The third step, use figure 1 In the preparation device shown, the electrospinning solution and the electrostatic spraying solution are respectively introduced into ...

Embodiment 2

[0125] In this example, the difference from Example 1 is that the mass fraction of the solute in the electrospinning solution is adjusted to 20%, and other parameters remain unchanged.

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Abstract

The invention relates to the technical field of aluminum electrolytic capacitors, in particular to composite electrolytic paper and a preparation method thereof. The composite electrolytic paper comprises: nanofibers, which form a network; and the particles are distributed in a network formed by the nanofibers. The invention also provides a method for preparing the composite electrolytic paper by combining electrostatic spinning and electrostatic spraying. In the composite electrolytic paper provided by the invention, the surfaces of the particles are tightly combined with a plurality of nanofibers through a large amount of hydrogen-bond interaction and Van der Waals' force, and the nanofibers are bound in a certain space and are difficult to separate from a nanofiber net due to the binding force of the particles, so that the composite electrolytic paper has good electrochemical performance. The problems that the binding force between fibers is poor, the electrolytic paper is fluffy, the fibers are prone to falling off and the like in traditional artificial fiber electrolytic paper are effectively solved.

Description

technical field [0001] The present invention relates to the technical field of aluminum electrolytic capacitors, in particular, to a composite electrolytic paper and a preparation method thereof, and more particularly, to a nanofiber composite electrolytic paper and a preparation method thereof. Background technique [0002] As one of the three main components of capacitors, electrolytic paper is used to prevent short-circuit between cathode foil and anode foil on the one hand, and on the other hand, it can absorb a large amount of electrolyte as a cathode carrier. In recent years, the anti-dumping policy of electrolytic paper has led to a sharp reduction in the import volume of electrolytic paper. The domestic electrolytic paper supply chain mainly relies on leading domestic electrolytic paper production enterprises, such as Kane, Minfeng and Xianhe. With the rapid expansion of the capacitor market and the increasing demand for capacitor performance in high-end products, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00
CPCD21H27/00
Inventor 胡三元卢紫琼于丽霞张伟林周政
Owner 韶关东阳光电容器有限公司
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