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Polyionic liquid base micropore quasi solid state electrolyte preparation method and application

A technology of polyionic liquid and ionic liquid, which is applied in the field of solid electrolyte preparation technology, can solve the problems of reducing the mechanical strength of the polymer, difficulty in battery packaging, and increasing the short circuit of the battery, so as to achieve the goals of not easy to leak, reduce leakage and volatilization, and improve safety Effect

Inactive Publication Date: 2011-08-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are to add polyionic liquid directly to the liquid electrolyte to form a gel, thus reducing the mechanical strength of the polymer, resulting in difficulty in battery packaging and increasing the probability of short circuit of the battery. Therefore, it can be considered to prepare polyionic liquid first. Liquid-based microporous polymer film, then soaked in liquid electrolyte, a new method to obtain quasi-solid electrolyte
Technical difficulties in preparing polyionic liquid-based microporous quasi-solid electrolytes: (1) Selection and preparation of polyionic liquids

Method used

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  • Polyionic liquid base micropore quasi solid state electrolyte preparation method and application
  • Polyionic liquid base micropore quasi solid state electrolyte preparation method and application
  • Polyionic liquid base micropore quasi solid state electrolyte preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0025] In the first step, weigh 1 mol of N-vinylimidazole and 1 mol of 1-iodopropane, mix them evenly, put them into a reactor lined with polytetrafluoroethylene, seal the reactor, and heat up. After the autoclave was kept at 120°C for 4h, the autoclave was taken out; after the autoclave was cooled to room temperature, the product was taken out, and the excess iodinated alkane was washed away with ether solvent, and the residual ether solvent was removed by vacuum drying at 80°C for 24h to obtain 1-vinyl-3- Propyl imidazole iodide salt.

[0026] In the second step, weigh 5g of 1-vinyl-3-propylimidazole iodide salt, dissolve it in 10ml of ethanol solvent, add 2wt% azobisisobutyronitrile as initiator, N 2 After 30 hours of polymerization at 60°C under protection, the product was vacuum dried at 80°C for 24 hours to remove the ethanol solvent to obtain a polymerized ionic liquid.

[0027] In the third step, weigh 0.1g polymerized ionic liquid, 0.9g polyvinylidene fluoride, and 1.4g gl...

Embodiment 2

[0031] In the first step, weigh 1 mol of N-vinylimidazole and 1.2 mol of 1-iodopropane, mix them evenly, put them into a reactor lined with polytetrafluoroethylene, seal the reactor, and heat up. After the autoclave was kept at 100°C for 6h, the autoclave was taken out; after the autoclave was cooled to room temperature, the product was taken out, and the excess iodinated alkane was washed away with ether solvent, and the residual ether solvent was removed by vacuum drying at 80°C for 24h to obtain 1-vinyl-3- Propyl imidazole iodide salt.

[0032] In the second step, weigh 10g of 1-vinyl-3-propylimidazole iodide salt, dissolve it in 25ml of ethanol solvent, add 6wt% azobisisobutyronitrile as initiator, N 2 The polymerization reaction was conducted at 80°C for 10 hours under protection, and the product was vacuum dried at 80°C for 24 hours to remove the ethanol solvent to obtain a polymerized ionic liquid.

[0033] In the third step, weigh 0.3g polymerized ionic liquid, 0.7g polyvin...

Embodiment 3

[0037] In the first step, weigh 1 mol of N-vinylimidazole and 1.5 mol of 1-iodopropane, mix them evenly, put them into a reactor lined with polytetrafluoroethylene, seal the reactor, and heat up. After the autoclave was kept at 70°C for 8h, the autoclave was taken out; after the autoclave was cooled to room temperature, the product was taken out, and the excess iodoalkane was washed away with ether solvent, and the residual ether solvent was removed by vacuum drying at 80°C for 24h to obtain 1-vinyl-3- Propylimidazole iodonium salt.

[0038] In the second step, weigh 15g of 1-vinyl-3-propylimidazole iodide salt, dissolve it in 45ml of ethanol solvent, add 10wt% azobisisobutyronitrile as initiator, N 2 The polymerization reaction was carried out at 70°C for 24 hours under protection, and the product was vacuum dried at 80°C for 24 hours to remove the ethanol solvent to obtain a polymerized ionic liquid.

[0039] In the third step, weigh 0.6g polymerized ionic liquid, 0.4g polyvinyli...

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Abstract

The invention provides a polyionic liquid base micropore quasi solid state electrolyte preparation method, belonging to the field of preparation process technology of solid state electrolyte; in the method, imidazole iodide ion liquid containing unsaturated double bond at side chain is prepared, and then radical polymerization is carried out to obtain polyionic liquid, and then the polyionic liquid is mixed with polyvinylidene fluoride, a polymer micropore film is prepared by a phase transition method, and then the polymer micropore film is soaked in the electrolyte to obtain the polyionic liquid base micropore quasi solid state electrolyte; the polyionic liquid base micropore quasi solid state electrolyte is applied to dye sensitization solar batteries, the problem that the battery is encapsulated difficultly is not only solved, and the long-time stability of the battery is improved, but also the charge transmission capacity in the quasi solid state electrolyte system is effectively improved and the performance of the quasi solid state dye sensitization solar battery is effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of solid electrolyte preparation technology, and particularly relates to a preparation method and application of a polyionic liquid-based microporous quasi-solid electrolyte, and particularly relates to the application of the electrolyte to a dye-sensitized solar cell. Background technique [0002] Compared with traditional silicon solar cells, dye-sensitized solar cells (DSSCs) have the advantages of a wide range of raw materials, low prices, relatively simple manufacturing processes, and stable performance. Therefore, they have become a new research hotspot in the field of photoelectric conversion. Although dye-sensitized solar cells using liquid electrolytes have achieved gratifying results in the photoelectric efficiency of the cells, they have defects such as liquid leakage, volatile, flammable, and difficult to seal. These unstable factors limit the performance of dye-sensitized solar cells. Long-term stabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/025H01G9/20H01M14/00H01L51/48H01L51/42
CPCH01G9/2059Y02E10/542H01G9/2009H01G9/2031
Inventor 陶杰杨艳金鑫秦琦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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