Preparation and application of single-ion conductive polymer electrolyte membrane

A conductive polymer and electrolyte membrane technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problems of low ion migration number and low ion conductivity, achieve excellent cycle performance, improve ion conductivity, and the method is simple Effect

Inactive Publication Date: 2019-07-12
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for synthesizing a polymer electrolyte with high ion conductivity and migration number that is easy to operate for the problems of low ion conductivity or low ion transfer number existing in the existing polymer electrolytes

Method used

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  • Preparation and application of single-ion conductive polymer electrolyte membrane
  • Preparation and application of single-ion conductive polymer electrolyte membrane
  • Preparation and application of single-ion conductive polymer electrolyte membrane

Examples

Experimental program
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Embodiment 1

[0038] (1) The synthesis of the lithium-containing monomer (p-styrenesulfonyl) (trifluoromethylsulfonyl)imide lithium having the structure shown in general formula 1 is as follows:

[0039]Synthesis of p-styrenesulfonyl chloride: Add 12.0g sodium p-styrenesulfonate, 0.261g dimethylformamide and 120ml dry acetonitrile into a flask, and stir well to make the solid disperse evenly. Under an ice-water bath, 6 ml of double-distilled oxalyl chloride was added dropwise to the system under a nitrogen atmosphere, and the system returned to room temperature for 24 hours of reaction after the addition was complete. The reaction mixture was filtered to remove NaCl, and the filtrate was concentrated by rotary evaporation to remove about half of the solvent.

[0040] Synthesis of potassium (p-styrenesulfonyl)(trifluoromethylsulfonyl)imide: add 8.67g trifluoromethanesulfonamide, 0.63g dimethylaminopyridine, 24.3ml triethylamine and 100ml dry acetonitrile in a flask, Stir until all ingredien...

Embodiment 2

[0045] (1) The synthesis of the lithium-containing monomer (p-styrenesulfonyl) (fluorosulfonyl) imide lithium having the structure shown in general formula 1 is as follows:

[0046] Synthesis of p-styrenesulfonyl chloride: similar to the synthesis in Example 1, and will not be repeated here.

[0047] Synthesis of (p-styrenesulfonyl) (fluorosulfonyl) potassium imide: add 44.59g p-styrenesulfonyl chloride, 0.74g dimethylaminopyridine, 77.35g dipotassium hydrogen phosphate, 0.33g p-tert-butyl-phthalate in a flask Diphenol and 180ml of dry acetonitrile were stirred at 0°C until all components were completely dissolved. Then 20.0 g of freshly distilled fluorosulfonamide was slowly added to the flask under nitrogen atmosphere, and reacted at 25° C. for 72 hours. The precipitate was removed by filtration, and the filtrate was removed by rotary evaporation to obtain a crude product. The crude product was washed three times with 200 ml of dichloromethane, and the product was vacuum-dr...

Embodiment 3

[0052] (1) Lithium-containing monomer 1-[3-(methacryloyloxy)-(propylsulfonyl)]-1-(trifluoromethylsulfonyl)imide lithium having a structure shown in general formula 2 The synthesis is as follows:

[0053] Synthesis of 3-(chlorosulfonyl)propyl methacrylate: under an inert gas atmosphere, add 15.0g of 3-(methacryloyloxy)propyl-1-potassium sulfonate and 25ml of anhydrous Tetrahydrofuran and 1.7ml of dimethylformamide were added through a syringe, and the system was cooled to about 0°C. 39.9g thionyl chloride was added dropwise, with constant stirring, and the reaction was carried out at 0°C for 1 hour, then returned to 25°C for 12 hours. The resulting suspension was washed with 200 ml of ice water, the aqueous phase was decanted, and the lower organic phase was diluted with 80 ml of dichloromethane. The obtained dichloromethane solution was washed 6 times with 25 ml of water, and dried over anhydrous magnesium sulfate. Magnesium sulfate was removed by filtration, dichloromethan...

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Abstract

The invention discloses a preparation method and an application of a single-ion conductive polymer electrolyte membrane. The preparation method and the application are characterized by adopting heat initiated free radical polymerization, a polymerization system comprises lithium-containing monomers, poly(ethyleneglycol)methacrylate and a cross-linking agent, and a specific plasticizer is added toa reaction system before the reaction. The preparation method of the single-ion conductive polymer electrolyte membrane comprises steps as follows: the lithium-containing monomers, poly(ethyleneglycol)methacrylate, the cross-linking agent and a thermal initiator are dissolved in the plasticizer, and after heat initiated polymerization, the transparent self-supporting electrolyte membrane with certain mechanical strength is obtained. The preparation method and the application have the advantages as follows: a one-pot method is adopted for synthesis, the operation is convenient, and the steps are simple; the prepared electrolyte membrane has good mechanical strength, heat stability and electrochemical stability, and further has high ionic conductivity and large transport number of lithium ions; an assembled lithium metal battery shows excellent cycle performance.

Description

technical field [0001] The invention relates to the field of polymer electrolytes, in particular to a preparation method and application of a high-performance crosslinked single-ion conductive polymer electrolyte membrane. Background technique [0002] In recent years, lithium-ion batteries have played an increasingly important role in mobile electronics and electric vehicles. However, most of today's commercial lithium-ion batteries use organic liquid electrolytes, which have risks such as leakage, volatilization, fire and explosion. In addition, due to the limitation of positive and negative electrode materials, the actual energy density of current lithium-ion batteries can only reach 250Wh / kg, which limits the application of lithium-ion batteries in large-scale equipment to a certain extent. As the metal with the most negative electrode potential, metallic lithium has a specific capacity as high as 3860mAh / g. If it is used as the negative electrode material of lithium ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F230/04C08F218/00C08J5/22H01M10/0565H01M10/0525C08L51/08
CPCC08F283/065C08J5/22H01M10/0565H01M10/0525H01M2300/0082C08J2351/08Y02E60/10
Inventor 张望清罗光美
Owner NANKAI UNIV
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