A kind of titanium disulfide nanosheet/graphene composite counter electrode and preparation method thereof

A technology of titanium disulfide and composite materials, applied in the field of solar cells, can solve the problems of comparable electrodes and large charge transfer resistance

Active Publication Date: 2017-06-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the charge transport resistance at the contact interface between these carbon materials and the electrolyte is relatively large, and the I 3 - However, the catalytic activity is still not comparable to the commercial noble metal Pt counter electrode, so it is necessary to develop cheap counter electrode materials with fast electron transport function and high catalytic activity.

Method used

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  • A kind of titanium disulfide nanosheet/graphene composite counter electrode and preparation method thereof
  • A kind of titanium disulfide nanosheet/graphene composite counter electrode and preparation method thereof
  • A kind of titanium disulfide nanosheet/graphene composite counter electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.2g of graphene oxide, 0.3g of titanium powder and 1.0g of sulfur powder respectively and place them in a 150mL stainless steel ball mill jar for ball milling pretreatment. The mass ratio of the material to stainless steel balls with a radius of 2.5mm was 1:50, the tank was protected by argon, the ball mill speed was 300r / min, and the ball milling time was 8h. After ball milling finishes, the resulting mixture is taken out from the ball mill jar, weigh 0.3g of the mixture and place it in the first ceramic boat, weigh 0.3g of sulfur powder and place it in the second ceramic boat, and place the first ceramic boat containing the mixture in the second ceramic boat. Upstream of the nitrogen gas flow, place the second ceramic boat filled with sulfur powder downstream of the nitrogen gas flow, the distance between the two ceramic boats is 1cm, heat-up annealing treatment, the temperature rises from room temperature to 600°C at a heating rate of 5°C / min, and keeps the tem...

Embodiment 2

[0027] Weigh 0.2g of graphene oxide, 0.2g of titanium powder and 0.5g of sulfur powder respectively and place them in a 150mL stainless steel ball mill jar for ball milling pretreatment. The mass ratio of the material to the stainless steel ball with a radius of 1.5mm is 1:80, the tank is protected by argon, the ball mill speed is 300r / min, and the ball milling time is 12h. After the ball milling, the resulting mixture is taken out of the ball mill tank , weighing 0.3g of the mixture is placed in the first ceramic boat, weighing 0.5g of sulfur powder is placed in the second ceramic boat, the first ceramic boat containing the mixture is placed upstream of the nitrogen gas flow, and the second ceramic boat containing the sulfur powder The ceramic boat is placed downstream of the nitrogen gas flow, the distance between the two ceramic boats is 0cm, and the temperature is raised to annealing treatment, the temperature is raised from room temperature to 650 °C at a heating rate of 5...

Embodiment 3

[0029] Weigh 0.2g of graphene oxide, 0.2g of titanium powder and 0.5g of sulfur powder respectively and place them in a 100mL stainless steel ball mill jar for ball milling pretreatment. The mass ratio of the material to the stainless steel ball with a radius of 1.5mm is 1:80, the tank is protected by argon, the ball mill speed is 400r / min, and the ball milling time is 12h. After the ball milling, the resulting mixture is taken out from the ball mill tank , take by weighing 0.3g mixture and place it in the first ceramic boat, take by weighing 0.5g sulfur powder and place it in the second ceramic boat, place the first ceramic boat containing the mixture on the upstream of the nitrogen gas flow, place the sulfur powder filled The second ceramic boat is placed downstream of the nitrogen gas flow, the distance between the two ceramic boats is 0 cm, the temperature is raised to annealing treatment, the temperature is raised from room temperature to 700 ° C at a heating rate of 10 ° ...

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Abstract

The present invention relates to the field of solar cell technology and provides a titanium disulfide nano sheet / graphene composite material counter electrode preparation method. The method comprises the steps of (1) taking graphene oxide, titanium powder and sulfur powder as precursors to experience mechanical milling mixing, (2) allowing the mixture obtained in step (1) to experience high-temperature annealing under an inert atmosphere, and cooling the mixture to a room temperature to obtain a composite material whose sulfide nano sheet vertically grows on a graphene surface, (3) uniformly grinding the obtained composite material and a binder, and coating slurry to a conductive layer, and (4) allowing the conductive layer which is coated by the slurry obtained in step (3) to experience heating and annealing processing under the protection of the inert atmosphere, and cooling the conductive layer to the room temperature to obtain a target counter electrode. According to the method, the preparation process is simple, the cost of a raw material is low, the method is suitable for high-volume industrial preparation, compared with a traditional platinum counter electrode, the platinum counter electrode with high price, insufficient resource and poor stability can be substituted, and the method has an important meaning for the reduction of the cost of a dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a titanium disulfide nanosheet / graphene composite counter electrode and a preparation method thereof, belonging to the technical field of solar cells. Background technique [0002] The use of traditional fossil energy has resulted in increasingly serious environmental pollution. It is imperative to seek and develop new, efficient and renewable energy, and it has become a major challenging research topic. Compared with other renewable energy sources, solar energy has the advantages of abundant reserves, environmental friendliness, sustainable utilization, and no geographical restrictions, and has been favored by researchers at home and abroad. A solar cell is a tool that efficiently converts solar energy into electricity. As a member of the new thin-film solar cells, dye-sensitized solar cells (DSSCs) due to the simple packaging process, low cost, good stability and high photoelectric conversion efficiency (under AM 1.5G simula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542Y02P70/50
Inventor 邱介山于畅孟祥桐
Owner DALIAN UNIV OF TECH
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