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Quasi-solid nano-composite gel electrolyte, its production and use

A gel electrolyte and nanocomposite technology, applied in the intersection of chemical engineering and nanomaterial technology, can solve the problems of increasing steady-state diffusion current and apparent diffusion coefficient, difficult to seal liquid electrolyte battery, easy to leak liquid, etc. Improved charge transport capability, improved sealing and leakage, and improved photovoltage effects

Inactive Publication Date: 2007-04-04
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] The technical problem to be solved by the present invention is to provide a quasi-solid nanocomposite gel electrolyte and its preparation method and application, which not only solves the problems of difficult sealing and easy leakage of liquid electrolyte batteries, improves the long-term stability of batteries, but also effectively Improve the charge transport capacity in the quasi-solid gel electrolyte system, increase the steady-state diffusion current and apparent diffusion coefficient of ions participating in the redox reaction, thereby effectively improving the performance of the quasi-solid gel battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: Weigh 0.02g, 0.04g, 1.5g, 0.15g, 0.045g, 0.09g, 0.25g lithium iodide, iodine, 3-methoxypropionitrile, vinylidene fluoride-hexafluoropropylene copolymer , Nano-titanium dioxide particles, N-methylbenzimidazole, 1,2-dimethyl-3-propylimidazole iodine. Place weighed lithium iodide, iodine, 3-methoxypropionitrile, N-methylbenzimidazole and 1,2-dimethyl-3-propylimidazole iodine in a sealable clean container, Ultrasonic disperse for 15 minutes to make the system mix uniformly to form a liquid or ionic liquid electrolyte, and then add vinylidene fluoride-hexafluoropropylene copolymer and nano titanium dioxide particles to it. After sealing the container, use magnetic stirring to make the system evenly mixed, and heat the mixture in the container to 100° C. and keep it for 2 hours. During the heating process, keep stirring to make the whole system evenly mixed. In order to uniformly disperse the nanoparticles in the system, ultrasonic dispersion can be used. After t...

Embodiment 2

[0058] Example 2: Weigh 0.02g, 0.04g, 1.5g, 0.15g, 0.105g, 0.09g, 0.25g lithium iodide, iodine, 3-methoxypropionitrile, vinylidene fluoride-hexafluoropropylene copolymer , Nano-titanium dioxide particles, N-methylbenzimidazole, 1,2-dimethyl-3-propylimidazole iodine. And according to the preparation method described in Example 1, a quasi-solid nanocomposite gel electrolyte was prepared. Use electrochemical workstation to do cyclic voltammetry test to get I 3 - The steady-state diffusion current and apparent diffusion coefficient are 1.50×10 -7 A and 3.89×10 -10 m 2 / s, I - The steady-state diffusion current and apparent diffusion coefficient are 2.34×10 -7 A and 3.04×10 -1 0m 2 / s.

Embodiment 3

[0059] Example 3, weigh 0.02g, 0.04g, 1.5g, 0.15g, 0.15g, 0.09g, 0.25g lithium iodide, iodine, 3-methoxypropionitrile, vinylidene fluoride-hexafluoropropylene copolymer , Nano-titanium dioxide particles, N-methylbenzimidazole, 1,2-dimethyl-3-propylimidazole iodine. And according to the preparation method described in Example 1, a quasi-solid nanocomposite gel electrolyte was prepared. Use electrochemical workstation to do cyclic voltammetry test to get I 3 - The steady-state diffusion current and apparent diffusion coefficient are 1.65×10 -7 A and 4.27×10 -10 m 2 / s. I - The steady-state diffusion current and apparent diffusion coefficient are 2.24×10 -7 A and 2.90×10 -10 m 2 / s.

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Abstract

The quasi-solid and nano-multiple gel electrolyte and produce method and application is to equably mix nanograde additive into gelated electrolyte system with polymer coagulant or small molecule coagulant to get the quasi-solid and nano-multiple gel electrolyte. Compared with the common gel electrolyte, it solves the problem about sealing liquid state electrolyte batteries and leaking to enhance charge transmission ability and increase ionic steady pervasion current and apparent diffusion coefficient of redox and improving general capability of quasi-solid gel batteries. This electrolyte is using for dye-sensitized solar cell and fuel cell to enhance photovoltage, short circuit current density, photoelectric conversion efficiency and long time stability to dye-sensitized solar cell.

Description

technical field [0001] The invention belongs to the interdisciplinary fields of chemical engineering and nanomaterial technology, and relates to a quasi-solid nanocomposite electrolyte material and its application in the fields of dye-sensitized solar cells and fuel cells, in particular to a quasi-solid nanocomposite electrolyte and its application. Applications in dye-sensitized solar cells. Background technique [0002] For a long time, liquid electrolytes have been widely used in the fields of dye-sensitized solar cells and fuel cells due to the wide selection of materials, easy adjustment of electrode potential and high conductivity. However, due to the volatile solvent of the liquid electrolyte, the battery is easy to leak and difficult to seal. Therefore, the non-volatile quasi-solid and non-volatile solid-state electrolytes have become a new focus of research by researchers. Taking dye-sensitized solar cells as an example, although dye-sensitized solar cells using li...

Claims

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Application Information

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IPC IPC(8): H01B1/06H01B1/12C08L71/02C08L33/20C08L63/00C08L27/16C08K5/521C08J3/075H01G9/022H01G9/028H01G9/032H01M8/02B82B1/00B82B3/00
Inventor 霍志鹏戴松元王孔嘉
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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