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A kind of slurry for preparing high porosity electrode foil and preparation method thereof
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An electrode foil, high void technology, applied in the field of sintered foil, can solve the problem of difficulty in controlling the void ratio
Active Publication Date: 2022-07-12
XINJIANG JOINWORLD CO LTD
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[0007] The purpose of the present invention is to provide a slurry for preparing high-porosity electrode foil, which solves the problem that it is difficult to control the porosity when using the sintering method to prepare the electrode foil, especially when using small particle size aluminum powder for sintering, it can prepare Electrode foils with various porosity
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preparation example Construction
[0044] The preparation method of the above-mentioned slurry, comprises the following steps:
[0045] (1) After mixing dispersant, binder and filler, primary slurry is obtained;
[0046] (2) stirring the primary slurry to obtain a finished slurry in an emulsion state;
[0047] (3) adding aluminum powder to the finished slurry, and performing homogenization treatment to obtain the slurry.
[0048] Further, in the step (2), the temperature of the stirring treatment is 25-40° C., the rotation speed is 0-2000r / min, and the time is 0-5h.
[0049] Further, in the step (3), the rotational speed of the homogenization treatment is 1000-2000 r / min, and the time is 10-120 min.
Embodiment 1
[0051] The specific operation steps are as follows:
[0052] (1) Use ether or ester organic matter as dispersant, use resinous substance as binder, use saturated alcohol as organic filler, the filler is dispersed in the dispersant in the form of tiny spherical droplets, and mixed uniformly to obtain primary organic slurry.
[0054] The presence of fillers will cause more voids in the distribution of aluminum powder.
[0055] The weight ratio of the slurry components is: dispersant 80-98.5: binder 1-10: filler 0.5-10.
[0056] (2) Use a magnetic stirrer to process the primary organic slurry of step 1 to prepare a uniformly dispersed emulsion, that is, a finished slurry.
[0057] The size of the filler can be changed according to the needs of the stirring ...
Embodiment 2
[0060]Diethylene glycol butyl ether is used as dispersant, acrylic resin is used as binder, ethylene glycol is used as filler, and the slurry is prepared according to the weight ratio of 93:2:5. The emulsion is obtained, and its appearance is as attached figure 1 shown.
[0061] The filler is present in the emulsion in the form of spherical droplets.
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Abstract
The present invention relates to a slurry for preparing high-porosityelectrode foil and a preparation method thereof. A slurry for preparing a high-porosityelectrode foil, the slurry includes: aluminum powder, a dispersant, a binder and a filler; wherein, the aluminum powder accounts for 40-60% of the total mass of the slurry %; the binder is resin organic matter. The invention also discloses the preparation method of the slurry. The slurry for preparing high-porosityelectrode foil and the preparation method thereof described in the present invention can prepare electrode foils with various porosity.
Description
technical field [0001] The invention belongs to the technical field of sintered foils, and in particular relates to a slurry for preparing a high-porosity electrode foil and a preparation method thereof. Background technique [0002] The sintered foil is made of high temperature sintered aluminum powder and base aluminum foil. When this method is used, it is easy to cause the situation of void clogging. Porosity refers to the space between the aluminum balls and the aluminum balls in the aluminum powder layer, and there is no solid in the middle, which can be filled with the chemical liquid and the electrolyte. The void ratio is closely related to the capacity, loss, and leakage current of the electrode foil. Therefore, it is very critical to control the porosity of the electrode foil. [0003] As early as 2008, Japan Toyo Aluminum Co., Ltd. disclosed electrode materials for aluminum electrolytic capacitors and a method for manufacturing the electrode materials. The anode...
Claims
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