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Counter electrode for dye-sensitized solar cell and preparation method thereof

A solar cell and dye sensitization technology, applied in the field of solar cells, can solve the problems of complex synthesis process and high cost, and achieve the effects of wide sources, low production cost, and low equipment requirements

Active Publication Date: 2016-10-12
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the materials mentioned above are synthesized in the laboratory. The synthesis process is relatively complicated and the cost is high. There is still a certain distance from the mass production of the counter electrode of the dye-sensitized battery.

Method used

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  • Counter electrode for dye-sensitized solar cell and preparation method thereof
  • Counter electrode for dye-sensitized solar cell and preparation method thereof
  • Counter electrode for dye-sensitized solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of LiFePO 4 Base counter electrode paste:

[0027] 2 g of commercial battery-grade LiFePO 4 (the massfraction of carbon element is less than 0.2%), 0.2g particle diameter is the nano-titanium dioxide of 25nm, 1g ethyl cellulose ethanol solution and 4ml terpineol are mixed and stirred evenly, and mixed material is through QM-3B type high-speed ball mill with 1200 revs / Grinding for 2 hours at a speed of 10 minutes to obtain uniform and viscous LiFePO 4 base counter electrode paste.

[0028] 2. Prepare the counter electrode:

[0029] Clean FTO (doped with fluorine SnO2 Transparent conductive glass) two ends stick 3M adhesive tape, be fixed on the platform, film thickness is controlled by the number of layers of 3M adhesive tape, all is single-layer 3M adhesive tape among the present invention. First LiFePO prepared in step 1 4 The base-counter electrode slurry is dropped on the conductive surface of FTO, and the slurry is scraped back and forth by scra...

Embodiment 2

[0033] 1. Preparation of LiFePO 4 Base counter electrode paste:

[0034] 4 g of commercial battery-grade LiFePO 4 (the mass fraction of carbon element is less than 0.2%), 0.3g particle diameter is the nano-titanium dioxide of 25nm, 1.5g ethyl cellulose ethanol solution and 6ml terpineol are mixed and stirred evenly, be placed in ball-milling jar ball-milling 1.5h, obtain uniform LiFePO 4 base counter electrode paste.

[0035] 2. Prepare the counter electrode:

[0036] LiFePO 4 The base-counter electrode paste is scraped and coated on a clean ITO (indium tin oxide semiconductor transparent conductive glass), and the subsequent steps are the same as in the first embodiment.

Embodiment 3

[0038] 1. Preparation of LiFePO 4 Base counter electrode paste:

[0039] 6 g of commercial battery-grade LiFePO 4 (the mass fraction of carbon element is less than 0.2%), 0.4g of nano-titanium dioxide with a particle size of 25nm, 2g of ethyl cellulose ethanol solution and 8ml of terpineol are mixed and stirred evenly, and placed in a ball mill jar for ball milling for 1.5h to obtain a uniform LiFePO 4 base counter electrode paste.

[0040] 2. Prepare the counter electrode:

[0041] LiFePO 4 The base-counter electrode slurry is scraped and coated on clean AZO (aluminum-doped zinc oxide (ZnO) transparent conductive glass), and the subsequent steps are the same as in Embodiment 1.

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Abstract

The invention discloses a counter electrode for a dye-sensitized solar cell and a preparation method thereof. The counter electrode is composed of a conductive substrate and a LiFePO4 catalytic activity layer attached to the conductive substrate. The preparation method comprises steps: 1) a LiFePO4-based counter electrode paste is prepared: LiFePO4, nano-TiO2, an ethyl cellulose ethanol solution and terpineol are mixed and milled for 1 to 2 hours via a high-speed ball mill, and the LiFePO4-based counter electrode paste is obtained; 2) the counter electrode is prepared: uniform scrape coating or spin coating of the counter electrode paste is carried out on the conductive substrate, low temperature preheating at a temperature of 60 to 80 DEG C is firstly carried out, the conductive substrate is placed in a tubular furnace with a protective gas after the coating is dried, the temperature rises to 450 to 500 DEG C in a temperature-programmed method, heat preservation for 30 to 60 min is carried out, the LiFePO4 catalytic activity layer is formed, natural cooling to the room temperature is carried out, and inlet of the protective gas is stopped. The electrode has good catalytic effects on an iodine electrolyte, and can obtain approximate short circuit current density and open circuit voltage as a platinum electrode. The process of the preparation method is simple, the operation and the control are easy and safe.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a counter electrode for a dye-sensitized solar cell and a preparation method thereof. Background technique [0002] Dye-sensitized solar cells have attracted more and more attention due to their advantages of low cost and simple assembly. At present, the material used for the counter electrode of dye-sensitized solar cells is mainly noble metal platinum. Platinum-based electrodes have good intrinsic catalytic performance and good conductivity for iodine electrolytes. After being assembled into battery devices, high However, due to the rarity and high price of platinum metal, and its weak corrosion resistance to iodine-based electrolytes, its large-scale application as a counter electrode material for dye-sensitized solar cells is limited. [0003] In order to find new materials that can replace platinum electrodes or reduce the amount of platinum used, researchers have done ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/042H01G9/20H01G9/2022H01G9/2031Y02E10/542Y02P70/50
Inventor 陈冰狄毅冯继文肖占海
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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