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Gel electrolyte in dye-sensitized solar cell, special electrolyte and preparation method thereof

A technology of electrolyte and liquid electrolyte, which is applied in the field of dye-sensitized solar cells, can solve the problems of hindering redox electricity and reducing the photoelectric conversion efficiency of the battery, and achieve good photoelectric conversion efficiency, improved stability, and good application prospects.

Active Publication Date: 2010-12-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when polymers are used as gelling agents, in order to obtain a quasi-solid electrolyte with good stability, the amount of polymer added should be as much as possible, but when the amount of polymer added increases, the polymer chain will hinder redox couple I - / I 3 - transmission, so that the photoelectric conversion efficiency of the battery will decrease

Method used

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  • Gel electrolyte in dye-sensitized solar cell, special electrolyte and preparation method thereof
  • Gel electrolyte in dye-sensitized solar cell, special electrolyte and preparation method thereof
  • Gel electrolyte in dye-sensitized solar cell, special electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The components and moles are respectively elemental iodine 0.1mol, lithium iodide 0.1mol, N-methylbenzimidazole 0.45mol, 1,2-dimethyl-3-propylimidazole iodide salt 0.6mol, and the solvent is formazan In the liquid electrolyte of oxypropionitrile (amount of 1 L), 2.5% of the total mass of the liquid electrolyte was added with PEO having a molecular weight of 2.0×10 6 g / mol. Under stirring and sealing conditions, heat the gelling agent PEO and the liquid electrolyte to about 60°C. After the PEO gels, heat at 70-80°C for 48 hours to obtain the gel electrolyte provided by the present invention.

[0028] Dye-sensitized cells were prepared according to the following general method:

[0029] 1) Preparation of photoanode

[0030] This step is prepared according to the method provided by the following documents:

[0031] Self-Organization of TiO 2 Nanoparticles in Thin Films, S.D.Burnside, V.Shklover, C.Barbé, P.Comte, F.Arendse, K.Brooks, M. Chemistry of Materials, 10 (19...

Embodiment 2

[0037] The components and moles are respectively elemental iodine 0.1mol, lithium iodide 0.1mol, N-methylbenzimidazole 0.45mol, 1,2-dimethyl-3-propylimidazole iodide salt 0.6mol, and the solvent is formazan In the liquid electrolyte of oxypropionitrile (amount of 1L), add 5.0% of the total mass of liquid electrolyte with a molecular weight of 2.0×10 6 g / mol of PEO. Under the condition of stirring and sealing, the temperature of the gelling agent PEO and the above-mentioned liquid electrolyte was raised to 60°C, and after the PEO was gelled, it was heated at 70-80°C for 48 hours to obtain the gel electrolyte provided by the present invention.

[0038] The dye-sensitized solar cell was assembled according to the same method and preparation conditions as in Example 1, wherein the electrolyte used was the liquid electrolyte provided in this example.

[0039] Use CHI660 Electrochemical Workstation to test the AC impedance of the electrolyte, such as figure 1 (b), and further obta...

Embodiment 3

[0041] The components and moles are respectively elemental iodine 0.1mol, lithium iodide 0.1mol, N-methylbenzimidazole 0.45mol, 1,2-dimethyl-3-propylimidazole iodide salt 0.6mol, and the solvent is formazan In the liquid electrolyte of oxypropionitrile (amount of 1L), add 7.5% of the total mass of liquid electrolyte with a molecular weight of 2.0×10 6 g / mol of PEO. Under the condition of stirring and sealing, the temperature of the gelling agent PEO and the above-mentioned liquid electrolyte was raised to 60°C, and after the PEO was gelled, it was heated at 70-80°C for 48 hours to obtain the gel electrolyte provided by the present invention. The dye-sensitized solar cell was assembled according to the same method and preparation conditions as in Example 1, wherein the electrolyte used was the liquid electrolyte provided in this example.

[0042] Use CHI660 Electrochemical Workstation to test the AC impedance of the electrolyte, such as figure 1 (a), and further obtain the co...

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Abstract

The invention discloses a gel electrolyte in a dye-sensitized solar cell, a special electrolyte and a preparation method thereof. The electrolyte comprises the components of elementary iodine, lithium iodide, N-methyl benzimidazole, 1,2-dimethyl-3-propyl imidazolium iodide and solvent. The method comprises the steps of adding gelata into the liquid electrolyte, uniformly mixing, and obtaining the gel electrolyte in the dye-sensitized solar cell; the used liquid electrolyte comprises the following components: the iodide, the N-methyl benzimidazole and the 1,2-dimethyl-3-propyl imidazolium, and the solvent is 3-methoxy propionitrile; and the gelata is polyethylene oxide. The molecular weight of the polyethylene oxide in the method is 0.3-4.0 multiplied by 106g / mol. The using amount of the gelata is 2.5%-30.0% of the total weight of the liquid electrolyte. The gel electrolyte provided by the invention can not only lead the cell to have great photoelectric conversion efficiency, but also ensure the stability of the cell, thereby having good application prospects.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cells, and relates to a gel electrolyte and a preparation method thereof, in particular to a gel electrolyte and a special electrolyte in a dye-sensitized solar cell and a preparation method thereof. Background technique [0002] Energy is the driving force for human survival. After the development of human beings into the 21st century, the demand for energy is increasing, and the traditional fossil fuels (coal, oil, natural gas) are becoming increasingly exhausted due to continuous large-scale consumption. At present, the service life of fossil energy in the world is 42 years for oil, 67 years for natural gas, and 200 years for coal. The development of renewable new energy helps to alleviate the pressure on the world's energy and environment, and solar energy is the green renewable energy with the most widespread distribution and the largest amount of resources among all new energy sources. ...

Claims

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Application Information

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IPC IPC(8): H01G9/035H01G9/022H01G9/20H01M14/00H01L51/42H01L51/44H01L51/46
CPCY02E10/542Y02E10/549
Inventor 史彦涛朱益锋王立铎詹纯邱勇
Owner TSINGHUA UNIV
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