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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 increasing battery short circuit, reducing polymer mechanical strength, and difficulty in battery packaging, and achieves the advantages of reducing leakage and volatilization, not easy to leak, and improving safety. Effect

Inactive Publication Date: 2010-06-23
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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Effect test

Embodiment 1

[0025] In the first step, weigh 1 mol of N-vinylimidazole and 1 mol of 1-iodopropane, mix them uniformly, put them into a polytetrafluoroethylene-lined reaction kettle, seal the reaction kettle and heat up. Take out the autoclave after heat preservation at 120°C for 4h; after the autoclave is cooled to room temperature, take out the product, wash off the excess iodoalkane with ether solvent, and then vacuum dry at 80°C for 24h to remove the residual ether solvent to obtain 1-vinyl-3- Propimidazolium iodine salt.

[0026] Second step, take by weighing 5g 1-vinyl-3-propylimidazolium iodide salt, be dissolved in 10ml ethanol solvent, add 2wt% azobisisobutyronitrile as initiator, N 2 Polymerization was carried out at 60°C for 30 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.

[0027] The third step is to weigh 0.1g of polymerized ionic liquid, 0.9g of polyvinylidene fluoride, and 1....

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 polytetrafluoroethylene-lined reactor, seal the reactor and heat up. Take out the autoclave after heat preservation at 100°C for 6h; after the autoclave is cooled to room temperature, take out the product, wash off the excess iodoalkane with ether solvent, and then vacuum dry at 80°C for 24h to remove the residual ether solvent to obtain 1-vinyl-3- Propimidazolium iodine salt.

[0032] Second step, take by weighing 10g 1-vinyl-3-propylimidazolium iodide salt, be dissolved in 25ml ethanol solvent, add 6wt% azobisisobutyronitrile as initiator, N 2 Polymerize at 80°C for 10 hours under protection, and vacuum dry the product at 80°C for 24 hours to remove the ethanol solvent to obtain a polymerized ionic liquid.

[0033]The third step is to weigh 0.3g of polymerized ionic liquid, 0.7g of polyvinylidene fluoride, and 0.45g of glycerin and dissolve them in 20g of...

Embodiment 3

[0037] In the first step, weigh 1 mol of N-vinylimidazole and 1.5 mol of 1-iodopropane, mix them uniformly, put them into a reaction kettle lined with polytetrafluoroethylene, seal the reaction kettle and heat up. Take out the autoclave after heat preservation at 70°C for 8 hours; after the autoclave is cooled to room temperature, take out the product, wash off excess iodoalkane with ether solvent, and then vacuum dry at 80°C for 24 hours to remove residual ether solvent to obtain 1-vinyl-3- Propimidazolium iodine salt.

[0038] Second step, take by weighing 15g 1-vinyl-3-propylimidazolium iodide salt, be dissolved in 45ml ethanol solvent, add 10wt% azobisisobutyronitrile as initiator, N 2 Polymerize at 70° C. for 24 hours under protection, and vacuum-dry the product at 80° C. for 24 hours to remove the ethanol solvent to obtain a polymerized ionic liquid.

[0039] The third step is to weigh 0.6g of polymerized ionic liquid, 0.4g of polyvinylidene fluoride, and 0.9g of glycer...

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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-state electrolyte preparation technology, and in particular relates to a preparation method and application of a polyionic liquid-based microporous quasi-solid-state electrolyte, in particular 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 wide source of raw materials, low price, relatively simple manufacturing process, and stable performance, so 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, there are defects such as liquid leakage, volatile, flammable, and difficult to seal. These unstable factors limit the development of dye-sensitized solar cells. Long-term stability ...

Claims

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Application Information

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Patent Type & Authority Applications(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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