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Preparation method of special high-performance composite diaphragm material for alkaline battery

A composite diaphragm, alkaline battery technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of small fiber diameter of diaphragm paper, poor quality of diaphragm paper, and low uniformity of paper surface, and achieve alkali retention rate. Good, poor thickness uniformity, high paper surface uniformity

Active Publication Date: 2021-08-24
WELBON SPECIAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The separator paper produced by the meltblown method has a small fiber diameter but poor strength; the separator paper produced by the dry method is of poor quality
In the prior art, air bubbles are easily generated in the slurry, the paper surface evenness is low, and the preparation cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of modified silicone composite antifoam agent emulsion:

[0035] Step S21. Mix allyl polyoxyethylene polyoxypropylene ether, butyl acrylate and low-hydrogen silicone oil, and add the isopropanol solution of chloroplatinic acid dropwise at a temperature of 85°C. After the dropwise addition, React for 8 hours to obtain the organic silicon mother liquor;

[0036] Step S22, mix the silicone mother liquor and white carbon black, and heat under reflux at 150°C for 5 hours to obtain a paste; mix graphene oxide, dimethyl silicone oil and hydroxyl silicone oil at a speed of 8000r / min Under the condition of shear homogeneity for 40min, graphene oxide modified silicone oil was obtained;

[0037] Step S23, mix the paste and graphene oxide modified silicone oil, cut for 40 minutes at a rotation speed of 8000r / min, add sorbitan fatty acid ester, cut for 15 minutes at a temperature of 40°C, and then add Deionized water was sheared for 60 minutes, and finally γ-aminopropy...

Embodiment 2

[0042] To prepare the surface size:

[0043] Step S11, mixing sodium carboxymethyl cellulose and deionized water according to the mass ratio of 0.5:100 to obtain a mixed solution A; adding water to polyvinyl alcohol and steaming for aging, controlling the mass concentration at 8% to obtain a mixed solution B ;Mix the non-ionic surfactant and deionized water according to the mass ratio of 7:100 to obtain the mixed liquid C;

[0044] Step S12, mixing the mixed solution A, the mixed solution B and the mixed solution C according to a volume ratio of 1:1:1 to obtain a surface sizing agent.

[0045] Wherein, the nonionic surfactant is fatty alcohol polyoxyethylene ether.

Embodiment 3

[0047] To prepare the surface size:

[0048] Step S11, mixing sodium carboxymethyl cellulose and deionized water according to the mass ratio of 0.8:100 to obtain a mixed solution A; adding water to polyvinyl alcohol and steaming for aging, controlling the mass concentration at 9% to obtain a mixed solution B ;Mix the non-ionic surfactant and deionized water according to the mass ratio of 7:100 to obtain the mixed liquid C;

[0049] Step S12, mixing the mixed solution A, the mixed solution B and the mixed solution C according to the volume ratio of 1:1:2 to obtain a surface sizing agent.

[0050] Wherein, the nonionic surfactant is alkylphenol polyoxyethylene ether.

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Abstract

The invention discloses a preparation method of a special high-performance composite diaphragm material for an alkaline battery, and belongs to the technical field of preparation of diaphragm materials. The preparation method comprises steps: 1, pulping; crushing superfine vinylon fibers, lyocell fibers and PE / PET fibers, and then pouring the crushed fibers into the defibered mercerizing pulp; performing high-frequency circulation treatment; obtaining slurry; mixing the slurry with deionized water to prepare fiber slurry; 2, papermaking: mixing the fiber pulp with the modified organic silicon composite anti-foaming agent emulsion, preparing a slurry with deionized water after mixing, and carrying out inclined wire dehydration and squeezing dehydration on the obtained slurry; and 3, surface sizing: drying after dehydration, spraying a drying cylinder stripping agent, carrying out surface sizing, carrying out secondary drying after sizing, compacting by a calender, and rewinding and slitting to obtain the diaphragm material. The prepared diaphragm material is uniform in thickness and high in alkali retention rate and the battery using the diaphragm has a relatively good specific discharge capacity retention rate.

Description

technical field [0001] The invention belongs to the technical field of membrane material preparation, and in particular relates to a preparation method of a special high-performance composite diaphragm material for alkaline batteries. Background technique [0002] At present, the commonly used alkaline batteries mostly use manganese dioxide as the positive electrode, zinc as the negative electrode, and potassium hydroxide as the electrolyte. There is a separator material between the positive and negative electrodes, which is called battery separator paper. Battery separator paper is the weakest part of the battery. It is located between the positive and negative electrodes of the battery. Its function is to insulate electrons and allow ions to pass through. The quality of its physical properties directly affects the use, storage performance and service life of the battery. . [0003] Melt blown method, dry method, wet method and other processes can be used to produce separa...

Claims

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Application Information

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IPC IPC(8): H01M50/403H01M50/44H01M50/411
CPCH01M50/403H01M50/44H01M50/411Y02E60/10
Inventor 汤新根陈飞郝玉仙邓根青
Owner WELBON SPECIAL MATERIALS CO LTD
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