Siloxane-containing vinyl chloride copolymer, preparation method of the siloxane-containing vinyl chloride copolymer, battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and manufacturing method of the battery division plate

A technology of vinyl chloride copolymerization and battery separator, applied in chemical instruments and methods, battery pack components, circuits, etc., can solve problems such as affecting the performance and life of the battery, affecting the working efficiency of the battery, and the adhesive contaminating the electrolyte, etc. Achieve good strength, high mechanical strength and good wettability

Active Publication Date: 2014-11-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method of making battery separators is to glue the parts together two by two: the adhesive needs to be applied during the production process, however, the dosage of the adhesive used proves to be problematic, on the one hand it is applied too much Less, so that the bonded fluff is easy to cause falling off during use. On the other hand, if the amount of adhesive applied is too large, the adhesive may penetrate through the fluff, which will cause adhesive contamination At the same time, too much adhesive will increase the resistance of the separator, affect the working efficiency of the battery, and cause damage to the battery
The disadvantage of this method of making battery separators is that rubber separators or polyethylene separators are used as linings, resulting in insufficient overall strength and poor toughness of the separators, and there are many small circles with a diameter of 2 to 3.5mm on the linings. After the battery is charged and discharged for a long time, it will cause dendrite growth on the separator, which will easily cause a short circuit of the battery and seriously affect the performance and life of the battery.

Method used

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  • Siloxane-containing vinyl chloride copolymer, preparation method of the siloxane-containing vinyl chloride copolymer, battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and manufacturing method of the battery division plate
  • Siloxane-containing vinyl chloride copolymer, preparation method of the siloxane-containing vinyl chloride copolymer, battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and manufacturing method of the battery division plate
  • Siloxane-containing vinyl chloride copolymer, preparation method of the siloxane-containing vinyl chloride copolymer, battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and manufacturing method of the battery division plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A stainless steel autoclave with an internal volume of 100 mL was equipped with a temperature sensor, stirrer, reflux condenser, vinyl chloride monomer (VCM) feed line and initiator feed line. Metering pumps for VCM and initiator are connected to the reactor. Add a certain quality polyvinyl alcohol (polymerization degree 1700) and 1-vinyl heptaphenyl 8-arm silsesquioxane (POSS) monomer (analytical pure, Aldrich Company production), and then depressurized until reaching a vacuum of 50mmHg. Then add a certain quality of vinyl chloride monomer into the kettle. While stirring the material at a stirring speed of 800 rpm, the material was heated to 57°C. At the same time, 1% of the initiator azobisisobutyronitrile was added under pressure to start the polymerization reaction. After 48h, the polymerization reaction was completed, the unreacted monomers were collected, and the polymer slurry obtained by the reaction was poured into the ice methanol solution to allow the poly...

Embodiment 2

[0063] refer to figure 2 , the manufacture method of storage battery separator of the present invention, its steps are as follows:

[0064] (1) 5g of the siloxane-containing vinyl chloride copolymer prepared in Example 1, 5g of polyethylene glycol-600, 0.05g of lead stearate and 0.005g of carbon black were dissolved in 25g of N, N-dimethyl In acetamide, this polymer solution is loaded into the cavity of coating head 4;

[0065] (2) Pass the 0.5mm thick non-woven fabric 2 with an average pore diameter of 10 μm through the 2mm size slit coating head 4, and move downward at a speed of 0.05m / s, while the polymer solution in the coating head 4 is evenly coated Apply to both sides of the non-woven fabric 2;

[0066] (3) The non-woven fabric coated with the polymer solution is pressed and formed, so that the polymer solution penetrates the pores of the non-woven fabric and is compounded with the non-woven fabric, and simultaneously forms ribs with 5mm spacing on both sides;

[006...

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Abstract

The invention discloses a siloxane-containing vinyl chloride copolymer, a preparation method of the siloxane-containing vinyl chloride copolymer, a battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and a manufacturing method of the battery division plate. The siloxane-containing vinyl chloride copolymer has molecular weight of 20000 to 50000 and is shown in the structural formula (1). The battery division plate comprises a porous non-woven fabric. Two copolymer film layers are respectively coated on surfaces of two sides of the porous non-woven fabric. Apertures are uniformly and densely arranged on the surfaces of the copolymer film layers and an average diameter of the apertures is in a range of 0.1 to 10 microns. The copolymer film layers comprise the siloxane-containing vinyl chloride copolymer or mainly comprise the siloxane-containing vinyl chloride copolymer. The battery division plate prepared from the siloxane-containing vinyl chloride copolymer has good strength and hydrophily. The battery division plate has good wettability, high acid adsorption capacity, good flexibility, good foldability, large mechanical strength and good penetration resistance, is suitable for tightening assembling, and can effectively improve use performances of a storage battery.

Description

technical field [0001] The invention relates to a siloxane-containing vinyl chloride copolymer, a preparation method thereof, a storage battery separator and a preparation method thereof, in particular to a new nanocomposite material of PVC-g-POSS, its preparation method and its use A storage battery separator made of the material and a manufacturing method thereof. Background technique [0002] Inorganic-organic nanocomposites usually combine the advantages of inorganic nanoparticles and organic polymers, and thus become a new type of material with great development prospects in today's material science. Polyhedral oligomeric silsesquioxane (POSS) is different from silica, silicone and other fillers, it is an inorganic-organic doped compound with nanometer size and cage structure. The organic functional groups of POSS make it compatible with polymers and organic monomers in the size of nanostructures, and at the same time, cage-type POSS can be added to materials through p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/06C08F230/08C08F2/24H01M2/16B32B3/14B32B3/24B32B27/12C08J9/28
CPCY02E60/10
Inventor 王建黎郁宏飞
Owner ZHEJIANG UNIV OF TECH
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