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Quasi-solid electrolyte in dye-sensitized nanocrystalline solar cell and preparation method and application of quasi-solid electrolyte thereof

A technology of solar cells and dye sensitization, which is applied in the field of quasi-solid-state electrolytes for dye-sensitized nanocrystalline solar cells and its preparation and application, can solve the problems of reduced battery short-circuit current, small ion diffusion coefficient, and low photoelectric conversion efficiency. Achieve the effects of lowering the glass transition temperature, improving short-circuit current and photoelectric conversion efficiency, and facilitating ion movement

Inactive Publication Date: 2012-07-04
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer electrolyte has low ionic conductivity, small ion diffusion coefficient, and poor contact with the working electrode, so that the photoelectric conversion efficiency of dye-sensitized nanocrystalline solar cells using polymer electrolytes is lower than that of dye-sensitized nanocrystalline solar cells based on liquid electrolytes. Battery
The low ionic conductivity of the polymer electrolyte reduces the short-circuit current of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: 0.05g plasticizing salt-bis(trifluoromethylsulfonimide) lithium (LiTFSI) is added to PEO / P(VDF-HFP) / nano-SiO 2 Composite system. (I 2 / KI Redox electricity to mole ratio: I 2 :KI=1:7)

[0016] Weigh 0.2g of PEO / P (VDF-HFP) at a mass ratio of 2:3 and mix it with 6g of PC and DME organic solvents with a volume ratio of 7:3 at 80°C. Continue stirring until the dissolution is complete, then add 0.02 g SiO 2 Nano particles and absolute ethanol, SiO 2 The nanoparticle absolute ethanol solution is proportioned according to the following ratio: 0.002g / ml~0.1g / ml, and heating and stirring are continued to make the mixture uniform. Silica nanoparticles act as a solid plasticizer for polymers. The silica nanoparticles were dissolved in absolute ethanol and added to the mixture.

[0017] Add I to the mixed solution 2 / KI redox couple, the molar ratio is: I 2 :KI=1:7, I 2 The K in the / KI redox couple and the O in the polyoxyethylene satisfy: the K / O molar ratio is 0.6. Sti...

Embodiment 2

[0020] Example 2: 0.05g plasticizing salt LiTFSI is added to PEO / P(VDF-HFP) / nano SiO 2 Composite system. (I 2 / KI Redox electricity to mole ratio: I 2 :KI=1:10)

[0021] Weigh 0.2g of PEO / P (VDF-HFP) at a mass ratio of 2:3 and mix it with 6g of PC and DME organic solvents with a volume ratio of 7:3 at 80°C. Continue stirring until the dissolution is complete, then add 0.02 g SiO 2 And absolute ethanol, continue to heat and stir to mix evenly.

[0022] Add I to the mixed solution 2 / KI redox couple, the molar ratio is: I 2 :KI=1:10, I 2 The K in the / KI redox couple and the O in the polyoxyethylene satisfy: the K / O molar ratio is 0.8. Stir at room temperature for 4-8 hours until the blend is uniform.

[0023] Add 0.05 g of the plasticizing salt LiTFSI to the quasi-solid electrolyte while stirring, and continue stirring for 12-24 hours. Because the polymer is easy to agglomerate during the joining process, it is not easy to be too fast. The ionic conductivity of the quasi-solid ele...

Embodiment 3

[0025] Example 3: 0.10g of plasticizing salt LiTFSI was added to PEO / P(VDF-HFP) / nano SiO 2 Composite system. (I 2 / KI Redox electricity to mole ratio: I 2 :KI=1:10)

[0026] Weigh 0.2g of PEO / P (VDF-HFP) at a mass ratio of 2:3 and mix it with 6g of PC and DME organic solvents with a volume ratio of 7:3 at 80°C. Continue stirring until the dissolution is complete, then add 0.02 gSiO 2 And absolute ethanol, continue to heat and stir to mix evenly.

[0027] Add I to the mixed solution 2 / KI redox couple, the molar ratio is: I 2 :KI=1:10, I 2 The K in the / KI redox couple and the O in the polyoxyethylene satisfy: the K / O molar ratio is 0.8. Stir at room temperature for 4-8 hours until the blend is uniform.

[0028] While stirring, add 0.10 g of plasticizing salt LiTFSI to the quasi-solid electrolyte, and continue stirring for 12-24 hours. Because the polymer is easy to agglomerate during the joining process, it is not easy to be too fast. The ion conductivity of the quasi-solid elect...

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PUM

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Abstract

The invention discloses quasi-solid electrolyte in a dye-sensitized nanocrystalline solar cell. The quasi-solid electrolyte is characterized by comprising the following components: a polyoxyethylene and polytetrafluoroethene hexafluoropropene mixture, silica nano particles, an I2 / KI redox couple in a molar ratio of (1:7) to (1:10), lithium bis(trifluoromethyl sulfonimide) and an organic solvent A. The invention also discloses a preparation method and application of the quasi-solid electrolyte. Compared with the prior art, the invention has the advantages that: due to the quasi-solid electrolyte plasticized and modified by the lithium bis(trifluoromethyl sulfonimide), short-circuit current and photoelectric conversion efficiency of the dye-sensitized nanocrystalline solar cell are greatly improved.

Description

Technical field [0001] The present invention relates to a preparation method of a quasi-solid electrolyte of a solar cell. The invention also relates to a preparation method of the quasi-solid electrolyte and an application in the preparation of a solar cell. Background technique [0002] Dye-sensitized nanocrystalline solar cells have received extensive attention from countries all over the world for their simple manufacturing process, low cost, and high photoelectric conversion efficiency. Although the liquid electrolyte-based dye-sensitized nanocrystalline solar cell has achieved high photoelectric conversion efficiency, the liquid electrolyte is easy to leak and volatilize, which makes it difficult to seal the assembled battery, and the performance decreases in long-term practical applications and the service life is shortened . A lot of practical research shows that in order to solve the problems of liquid electrolytes, solid electrolytes can be used instead of liquid elect...

Claims

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Application Information

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IPC IPC(8): H01G9/022H01G9/20H01M14/00H01L51/46H01L51/48
CPCY02E10/542Y02E10/549
Inventor 诸跃进崔艳峥张京王培卿张雪妮孙强郑君冯姜伟
Owner NINGBO UNIV
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