Nitrogen-containing polymer electrolyte for dye-sensitized solar cell and preparation method of nitrogen-containing polymer electrolyte

A technology of solar cells and dye sensitization, which is applied in the field of dye-sensitized solar cells, can solve the problems of high ion conductivity and easy leakage of battery packaging electrolyte, achieve good long-term stability, solve the problem of easy leakage of packaging and electrolyte, and improve photoelectricity. The effect of conversion efficiency

Inactive Publication Date: 2020-09-22
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above deficiencies in the prior art, the present invention provides a nitrogen-containing polymer electrolyte for dye-sensitized solar cells and a preparation method thereof, which not only has the advantages of nitrogen-containing heterocyclic compounds, but also improves the performance of the battery. Photoelectric conversion efficiency solves the problem of easy leakage of battery packaging and electrolyte, and has little harm to the human body, high ionic conductivity, good contact with electrodes, good long-term stability, and reduces the steps and costs of preparing polymer electrolytes

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0022] (1) The isocyanate is at least one of toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and diphenylmethane diisocyanate (MDI).

[0023] (2) The diamine or polyamine is 3,3'-dimethyl-4,4-diaminodicyclohexylmethane, 4,4-diaminodicyclohexylmethane, methylcyclohexanediamine, One or both of triethylenediamine and polyether polyamine.

[0024] (3) The iodized salt is at least one of potassium iodide, sodium iodide, sodium iodide, and tetrabutylammonium iodide.

[0025] (4) The organic solvent is one or two or both of 1,4-butyrolactone, N-methylpyrrolidone, ethylene carbonate, propylene carbonate, acetonitrile, dimethyl carbonate or diethyl carbonate more than one combination.

[0026] Specifically, the above-mentioned preparation method of the nitrogen-containing polymer electrolyte for dye-sensitized solar cells is carried out in the following steps:

[0027] A, iodized salt (iodized salt can be at least one in potassium iodide...

Embodiment 1

[0045] Potassium iodide 45g and iodine 7.62g are dissolved with 1000mL of acetonitrile to make the I of potassium iodide - Molar concentration of 0.3 mol / L and I of iodine 3 - The molar concentration is 0.03 mol / L to obtain a liquid electrolyte. Weigh 20g of polyetheramine (molecular weight: 4000) and place it in a flask. Dehydrate it for about 2 hours at 110°C to 120°C and a vacuum pressure of 0.13KPa. 129g of electrolyte, after stirring and mixing evenly, 8.7g of toluene diisocyanate (TDI) was added dropwise, and the stirring and mixing was continued to obtain a polyurea polymer electrolyte precursor solution in a flowing state. Will be in 5×10 -4 mol L -1 Bipyridyl ruthenium dye (RuL 2 (NCS) 2 :2TBA) in absolute ethanol solution soaked for 24 hours for nanocrystalline porous TiO 2 The membrane electrode was taken out, rinsed with absolute ethanol, and dried. TiO 2 The electrode membrane was placed face up in a ventilated device, and the above polyurea polymer elect...

Embodiment 2

[0047] Sodium iodide 75g and iodine 12.7g are dissolved with 1000mL of 1,4-butyrolactone to make the I of potassium iodide - Molar concentration of 0.5 mol / L and I of iodine 3 - The molar concentration is 0.05 mol / L to obtain a liquid electrolyte. Weigh 20g of polyetheramine (molecular weight: 2000) and 2.56g of methylcyclohexanediamine in a flask, and dehydrate for about 2 hours at 120°C under a vacuum pressure of 0.13KPa. When the temperature drops to 70°C, pass through Nitrogen, add 205g of the prepared liquid electrolyte, stir and mix evenly, dropwise add the measured hexamethylene diisocyanate 20.88g, slowly raise the temperature, and continue the reaction at a stable temperature of 70°C to obtain a polyurea polymer electrolyte precursor solution. In a fluid state. Will be in 5×10 -4 mol L -1 Bipyridyl ruthenium dye (RuL 2 (NCS) 2 :2TBA) in absolute ethanol solution soaked for 24 hours for nanocrystalline porous TiO 2 The membrane electrode was taken out, rinsed w...

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Abstract

The invention discloses a nitrogen-containing polymer electrolyte for a dye-sensitized solar cell and a preparation method of the nitrogen-containing polymer electrolyte. The nitrogen-containing polymer electrolyte comprises a prepolymer and a liquid electrolyte, wherein the prepolymer is prepared by carrying out addition polymerization reaction on isocyanate and diamine or polyamine; the liquid electrolyte comprises iodized salt, iodine and an organic solvent, wherein the I- molar concentration of the iodized salt is 0.1-1 mol/L, and the I3- molar concentration of the iodine is 0.01-0.1 mol/L; and the mass ratio of the prepolymer to the liquid electrolyte is 1: (1-10). The nitrogen-containing heterocyclic compound not only has the advantages of the nitrogen-containing heterocyclic compound, improves the photoelectric conversion efficiency of the battery and solves the problems of battery packaging and easy electrolyte leakage, but also has small harm to a human body, high ionic conductivity, good contact with an electrode and good long-term stability, and reduces the steps and cost for preparing the polymer electrolyte.

Description

technical field [0001] The invention relates to the technical field of dye-sensitized solar cells, in particular to a nitrogen-containing polymer electrolyte for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] 1991M The team developed a new type of dye-sensitized nanocrystalline solar cell, referred to as DSSC, which opened up a new path for the development of solar cells ("A low-cost, high-efficiency solar cell based ondye-sensitized colloidal TiO 2 films”. Brain O’Regan and Michael Nature, 1991, 353:737-740. Colloidal TiO based on dye sensitization 2 thin-film low-cost, high-efficiency solar cells, Nature, 1991). [0003] Dye-sensitized solar cells have become a strong competitor to traditional silicon solar cells due to their simple fabrication method, low cost, and high conversion efficiency. They have attracted extensive attention and research, and good progress has been made. The electrolyte plays the role of regenerati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/00
CPCH01G9/2004H01G9/0029Y02E10/542
Inventor 戴玉华冯宏宇王子文
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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