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Preparation method for inorganic TiO<2> nanoparticle doped and modified acrylonitrile-methyl methacrylate copolymerization type gel electrolyte

A methyl methacrylate, gel electrolyte technology, applied in circuits, electrical components, secondary batteries and other directions, can solve the problems of reducing the strength of polymer film formation, poor stability, etc., to achieve performance optimization, low cost, overcoming stability Effect of Potential Window Low

Inactive Publication Date: 2016-09-14
SUN YAT SEN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the plasticizer in the polymer electrolyte is easy to react with the lithium electrode, and the stability is poor; the addition of a large amount of organic solvent greatly reduces the film-forming strength of the polymer, and there are many safety problems caused by the decomposition of the electrolyte.

Method used

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  • Preparation method for inorganic TiO&lt;2&gt; nanoparticle doped and modified acrylonitrile-methyl methacrylate copolymerization type gel electrolyte
  • Preparation method for inorganic TiO&lt;2&gt; nanoparticle doped and modified acrylonitrile-methyl methacrylate copolymerization type gel electrolyte
  • Preparation method for inorganic TiO&lt;2&gt; nanoparticle doped and modified acrylonitrile-methyl methacrylate copolymerization type gel electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0043] (1) Acrylonitrile and methyl methacrylate monomers were distilled off at 120° C. using a distillation flask to remove the polymerization inhibitor. Add 1.0 g of emulsifier sodium lauryl sulfate and 20 mL of deionized water into a nitrogen-protected three-thigh flask and stir to dissolve. Add 10g of acrylonitrile monomer, 10g of methyl methacrylate monomer and 0.2g of dipropylene phthalate in sequence, heat in an oil bath at 70°C, add 0.1g of sodium persulfate and continue stirring for 8 hours. The resulting emulsion was poured into 20 mL of 3% aluminum sulfate solution, stirred to break the emulsion. The product was washed successively with distilled water and ethanol, and vacuum-dried to obtain a copolymer powder of acrylonitrile and methyl methacrylate.

[0044] (2) 2g P25 TiO 2 The nanoparticles were ultrasonically dispersed in 20 mL of dimethylformamide solvent, 2 g of the prepared polymer powder was added to the above solution, and vigorously stirred at 70° C. to...

Embodiment 2～7

[0057] The preparation method of embodiment 2-7 and embodiment 1, difference is the ratio of acrylonitrile and methyl methacrylate monomer and TiO 2 The amount of nanoparticle doping. Specific monomer ratio and TiO 2 The amount of nanoparticle doping and the results of each example are listed in Table 1 and Table 2.

[0058] Table 1. Ratio control of acrylonitrile and methyl methacrylate monomers

[0059]

[0060] Table 2.TiO 2 Nanoparticle doping amount control

[0061]

[0062]

[0063] Although the properties of the copolymer gel electrolytes prepared from monomers with different proportions in Examples 2-5 in Table 1 are lower than those of Example 1, they can all achieve the purpose of the present invention.

[0064] From the results in Table 2, it can be seen that TiO 2 The doping amount will also affect the performance of the gel electrolyte. TiO claimed in the present invention 2 The doping amount can realize the purpose of the present invention, which ...

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Abstract

The invention provides a preparation method for an inorganic TiO<2> nanoparticle doped and modified acrylonitrile-methyl methacrylate copolymerization type gel electrolyte. The preparation method comprises the following steps of S1, adding water to dissolve a small amount of lauryl sodium sulfate under nitrogen protection, then adding acrylonitrile and methyl methacrylate monomer, next, adding a small amount of diallyl phthalate and sodium persulfate to be reacted to obtain a cross-linking product; adding the cross-linking product to an aluminum sulfate solution to be subjected to demulsification, washing and drying to obtain a copolymer; and S2, dispersing titanium dioxide into a solvent to form a dispersion liquid; and adding the copolymer obtained in the step S1 to the dispersion liquid, then stirring, coating, washing and drying to obtain the copolymer substrate membrane. The electrolyte obtained by the method overcomes the problems of low stable potential window, low liquid absorption amount, low ion conductivity and low mechanical strength; and in addition, the gel electrolyte is simple in process, does not need a support or a carrier, and can be directly used as the electrolyte solution as well as a separator of the lithium ion battery.

Description

technical field [0001] The invention belongs to the field of lithium ion battery electrolyte, in particular to a 2 The preparation method of nano particle doped modified acrylonitrile-methyl methacrylate copolymer gel electrolyte. Background technique [0002] Energy shortage and environmental degradation are common concerns in today's society, and finding clean energy and renewable energy has become a common concern of all countries in the world. With the development of social economy and science and technology, the development and utilization of various new energy sources requires the development of different types of energy storage devices to achieve efficient conversion and utilization of new energy sources. Lithium-ion battery is a new, efficient and practical energy storage device, which has the advantages of high energy density, long service life, environmental friendliness, and wide operating temperature window. Since it was put into the market in 1991, it has attr...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0565
CPCH01M10/0525H01M10/0565Y02E60/10
Inventor 卢锡洪于明浩童叶翔陈晓军雷秋芬户献雷郭守彬
Owner SUN YAT SEN UNIV
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