Photo-responsive gel electrolyte and preparation method and application thereof

A gel electrolyte, light-responsive technology, applied in the field of dye-sensitized solar cells, can solve the problems of performance degradation, shortened service life, low ionic conductivity, etc. Effect

Active Publication Date: 2016-05-04
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although dye-sensitized solar cells based on liquid electrolytes have achieved high photoelectric conversion efficiency, liquid electrolytes are prone to leakage and volatilization, which makes it difficult to seal the assembled cells, and in long-term practical applications, the performance decreases and the service life is shortened.
All-solid-state electrolytes exhibit sustained stability in charge transport capabilities and are thus widely considered to be very promising alternatives, but suffer from low ionic conductivity.
In the current research work, some related researchers added conductive nanoparticles to the electrolyte to improve the ionic conductivity and shorten the diffusion path of the redox pair to the electrode / electrolyte interface, but this type of gel electrolyte generally It is heterogeneous, solid-liquid separation and nano-particle agglomeration will occur after long-term use
[0005] At present, there is no report on the improvement of the ionic conductivity of gel electrolytes by driving the movement of polymer molecular chains and promoting the migration of ions in the polymer network through the ultraviolet-visible light-responsive isomerization phenomenon.

Method used

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  • Photo-responsive gel electrolyte and preparation method and application thereof
  • Photo-responsive gel electrolyte and preparation method and application thereof
  • Photo-responsive gel electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 does not contain the polyacrylonitrile gel electrolyte of azobenzene

[0062] Component one: pure PAN powder (weight average molecular weight is 150000);

[0063] Component two: using acetonitrile as solvent, dimethyl propylimidazolium iodine, 4-tert-butylpyridine, I 2 , The concentration of the substance of LiI is 0.3mol / L, 0.5mol / L, 0.05mol / L, 0.5mol / L, and the electrolyte is obtained by configuration;

[0064] Mix component 1 and component 2 at a mass ratio of 1:20, and mix well to obtain a polyacrylonitrile gel electrolyte.

Embodiment 2

[0065] Example 2 The mass ratio of azobenzene to polyacrylonitrile is a gel electrolyte of 1:99

[0066] Component 1: Add 0.005g of Azo11OHOH to 15mL of N,N-dimethylformamide organic solution containing 0.495g of polyacrylonitrile (weight average molecular weight: 150,000), stir at 60°C for 6 hours, add ethanol to precipitate the product, Grinding at room temperature, grinding to remove residual N,N-dimethylformamide in a fume hood to obtain a powdery solid, which was dried under vacuum at 60°C for 24 hours to obtain Azo11OHOH / polypropylene with a mass fraction of Azo11OHOH of 1%. Nitrile mixture, named 1% Azo11OHOH / polyacrylonitrile mixture;

[0067] Component two: using acetonitrile as solvent, dimethyl propylimidazolium iodine, 4-tert-butylpyridine, I 2 , The concentration of the substance of LiI is 0.3mol / L, 0.5mol / L, 0.05mol / L, 0.5mol / L, and the electrolyte is obtained by configuration;

[0068] Mix component 1 and component 2 at a mass ratio of 1:20, and stir evenly to...

Embodiment 3

[0069] Example 3 The mass ratio of azobenzene to polyacrylonitrile is a gel electrolyte of 1:4

[0070] Component 1: Add 0.1g of Azo11OHOH to 15mL of N,N-dimethylformamide organic solution containing 0.4g of polyacrylonitrile (weight average molecular weight: 150,000), stir at 60°C for 6 hours, add ethanol to precipitate the product, Grind at room temperature, and grind to remove residual N,N-dimethylformamide in a fume hood to obtain a powdery solid. After vacuum drying at 60°C for 24 hours, Azo11OHOH / polypropylene with a mass fraction of Azo11OHOH of 20% is obtained Nitrile mixture, named 20% Azo11OHOH / polyacrylonitrile mixture;

[0071] Component two: using acetonitrile as solvent, dimethyl propylimidazolium iodine, 4-tert-butylpyridine, I 2 , The concentration of the substance of LiI is 0.3mol / L, 0.5mol / L, 0.05mol / L, 0.5mol / L, and the electrolyte is obtained by configuration;

[0072] Mix component 1 and component 2 at a mass ratio of 1:20, and stir evenly to obtain a 20...

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PUM

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Abstract

The invention provides a photo-responsive gel electrolyte and a preparation method and application thereof. The photo-responsive gel electrolyte comprises an electrolyte solution and further comprises an azobenzene/polymer matrix mixture, wherein the azobenzene/polymer matrix mixture is prepared by mixing azobenzene and a polymer matrix together. According to the photo-responsive gel electrolyte disclosed by the invention, azobenzene is introduced in the polymer matrix and used to absorb light entering the electrolyte through a photo-anode, and then the azobenzene generates isomerism to drive the movement of the chain segment of the polymer, so as to promote migration of ions in the polymer matrix, further achieve the aim of improving the ionic conductivity of the electrolyte and enhance the photo-electro conversation rate of a dye-sensitized solar cell.

Description

technical field [0001] The invention relates to the field of dye-sensitized solar cells, in particular to a photoresponsive gel electrolyte and its preparation method and application. Background technique [0002] Fossil energy is non-renewable energy, which is gradually exhausted, especially in recent years, with the rapid development of emerging countries, the demand for energy has greatly increased. At the same time, the use of fossil energy produces a large amount of greenhouse gases, causing global climate change. Replacing traditional fossil energy with solar energy is the best way to solve the energy crisis and protect the environment. In recent years, solar cells have developed very rapidly and have been widely used in many fields of the national economy. However, at present, the high cost of solar cells has always been the bottleneck for the promotion and use of solar cells. Therefore, the production of low-cost, stable, and high-efficiency solar cells is the rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20
CPCH01G9/2009Y02E10/542
Inventor 阮文红杨富杰章明秋容敏智
Owner SUN YAT SEN UNIV
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