Method for preparing AGM (Absorptive Glass Met) separator with high specific surface area

A technology with high specific surface area and specific surface area, applied in the direction of separators/films/diaphragms/spacers, structural parts, electrical components, etc. Pressure difference and other problems, to achieve the effect of improving delamination, promoting acid-carrying capacity, and enhancing wet elasticity

Active Publication Date: 2017-05-31
上饶市安纳拓新材料有限公司
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, the particle size of nano silicon oxide is 1.5-10nm, and the specific surface area is 680-1100㎡/g. The AGM separator with high specific surface area is prepared. The glass fiber separator material has a more complex zigzag channel structure, which improves the separator The specific surface area of ​​the plate; the tortuosity factor of the pore structure of the separator is increased, and the diffusion flux of the acidic medium is greatly reduced, thus improving the acid-carrying capacity of the separator and greatly reduci

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing AGM (Absorptive Glass Met) separator with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] Such as figure 1 Shown, the preparation method of the AGM separator of high specific surface area among the present invention, can comprise the following steps:

[0058] (1) Preparation of nano-silica aqueous dispersion: add appropriate amount of water to an emulsifier, add 0.05-1.47% dispersant, stir at room temperature for 1-3 minutes; add 0.1-10% nano-silica, beat at high speed for 15 ~ 30 minutes, so that the mass fraction of the nano silicon dioxide aqueous dispersion is 0.1 ~ 10% (especially 7.5 ~ 10%);

[0059] In this process, an emulsifying machine is used for high-speed beating, which is determined by the small particle size of nano-silica and easy agglomeration. High-speed beating is conducive to the dispersion of nano-silica;

[0060] When the concentration of nano-silicon oxide exceeds 10%, the nano-silicon oxide solution presents a viscous paste;

[0061] (2) Ingredients and beating: add appropriate amount of water to the beating machine, add retention a...

Embodiment 1

[0082] A kind of AGM separator of high specific surface area in the present embodiment is made up of fibrous material and nano-silica; Wherein, fiber material is glass fiber and polyester fiber; In the AGM separator of this high specific surface area, The mass percentage of glass fiber is 91.9%, the mass percentage of polyester fiber is 8%, and the mass percentage of nano silicon dioxide is 0.1%.

[0083] During specific preparation, according to the following steps:

[0084] (1) Preparation of nano-silicon dioxide aqueous dispersion: add an appropriate amount of water to an emulsifier, add nano-silicon dioxide, and beat at a high speed for 15 to 30 minutes, so that the mass fraction of the nano-silicon dioxide aqueous dispersion is 0.1 to 10%;

[0085] (2) Ingredients and beating: add appropriate amount of water to the beating machine, add glass fiber, beating for 15-20 minutes; add polyester fiber, beating for 4-8 minutes;

[0086] (3) Slurry mixing and slag removal: dilute...

Embodiment 2

[0094] A kind of AGM separator of high specific surface area in the present embodiment is made up of fibrous material and nano silicon dioxide; Wherein, fiber material is glass fiber; In the AGM separator of this high specific surface area, the quality of glass fiber The percentage is 90%, and the mass percentage of nano silicon dioxide is 10%.

[0095] During specific preparation, according to the following steps:

[0096] (1) Preparation of nano-silica aqueous dispersion: add an appropriate amount of water to an emulsifier, add nano-silica, and beat at a high speed for 15-30 minutes, so that the mass fraction of nano-silica aqueous dispersion is 7.5-10%;

[0097] (2) Ingredients and beating: Add appropriate amount of water into the beating machine, add glass fiber, and beat for 15 to 20 minutes;

[0098] (3) Slurry mixing and slag removal: dilute with water so that the mass concentration of the diluted slurry is 0.1-0.4%, adjust the pH value to 2.0-3.5, and then carry out s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing an AGM separator with high specific surface area. The method comprises the following steps: preparing glass fiber slurry from water and glass fibers, adding water for diluting, and regulating the pH value; performing negative pressure suction filtration and dehydration so as to obtain a primary molded wet separator; and applying nanosized silica aqueous dispersion to the surface of the wet separator, performing negative pressure suction filtration and dehydration so as to obtain a secondary molded wet separator, and drying, thereby obtaining the AGM separator with high specific surface area. The AGM separator with high specific surface area disclosed by the invention can achieve the effects of improving the stability and uniformity of a colloidal network structure and improving the layering phenomenon of electrolyte; meanwhile, the problem that the AGM separator is low in wet elasticity and low in assembly pressure retaining capacity is effectively solved, the pore size of the separator can be greatly reduced, the performance of preventing short circuit caused by dendrite puncture can be further improved, capacity degradation of a storage battery is retarded, and the cycle service life of the storage battery is prolonged.

Description

technical field [0001] The invention belongs to the field of storage batteries, and more specifically relates to a method for preparing an AGM separator with a high specific surface area, and the separator is suitable for lead-acid batteries. Background technique [0002] The battery separator is a porous insulating material, which is placed between the positive and negative plates of the battery to separate the positive and negative plates and play the role of insulation to avoid short circuit of the battery. At the same time, the ions that participate in the chemical reaction are allowed to pass through during the charging and discharging process of the battery. For the sealed maintenance-free battery, it is also necessary to ensure that the oxygen precipitated from the positive electrode reaches the negative electrode through the separator to complete the hydrogen-oxygen recombination reaction. Therefore, as an important part of the battery, the separator plays a decisive...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M2/14H01M2/16
CPCH01M50/403H01M50/409Y02E60/10
Inventor 徐翠云李翔汪程红王成
Owner 上饶市安纳拓新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap