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Preparation method of molybdenum disulfide and sulfur-doped carbon sphere composite electrode

A molybdenum disulfide, composite electrode technology, applied in the field of dye-sensitized solar cells, can solve the problems of high price and unsuitable for large-scale application, etc.

Active Publication Date: 2018-06-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing dye-sensitized solar cell Pt counter electrode material is expensive and not suitable for large-scale application, and provides a dye-sensitized solar cell MoS 2 / S-doped carbon sphere composite material counter electrode preparation method

Method used

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  • Preparation method of molybdenum disulfide and sulfur-doped carbon sphere composite electrode
  • Preparation method of molybdenum disulfide and sulfur-doped carbon sphere composite electrode
  • Preparation method of molybdenum disulfide and sulfur-doped carbon sphere composite electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1 The amount of precursor solution is 100 μL, and the MoS is prepared at 800°C for 10 minutes 2 / S-doped carbon sphere composite counter electrode

[0024] Fully disperse 50mg of carbon powder in 10mL of ethanol, add appropriate amount of MoCl 5 making MoCl 5 The concentration is 330mmol / L, and stir well. Then take 100 μL of the above precursor solution, evenly drop-coat it on a 3×5 cm graphite paper, and then dry it on a hot stage at 60°C for 10 min. Put the dried sample in a tube furnace, and take 1g of sulfur powder and place it at the end of the tube furnace near the air inlet, heat it to 800°C at a rate of 10°C / min in an Ar atmosphere, keep it warm for 10min, and then Cool down to room temperature naturally.

[0025] The XRD of the obtained samples is presented at figure 1 In , the diffraction peak at 14.38° corresponds to MoS 2 (002) crystal face, indicating that MoS was successfully prepared on graphite paper 2 . SEM images are presented at Figu...

Embodiment 2

[0032] Example 2 The amount of precursor solution is 200 μL, and the MoS is prepared at 800°C for 10 minutes 2 / S-doped carbon sphere composite counter electrode

[0033] Fully disperse 50mg of carbon powder in 10mL of ethanol, add appropriate amount of MoCl 5 , such that MoCl 5 The concentration is 330mmol / L, and stir well. Then take 200 μL of the above precursor solution, drop-coat it evenly on a 3 × 5 cm graphite paper, and then dry it on a hot stage at 60 °C for 10 min. Put the dried sample in a tube furnace, and take 1g of sulfur powder and place it at the end of the tube furnace near the air inlet, heat it to 800°C at a rate of 10°C / min in an Ar atmosphere, keep it warm for 10min, and then Cool down to room temperature naturally. figure 2 is the XRD pattern of the obtained sample.

Embodiment 3

[0034] Example 3 The dosage of the precursor solution is 100 μL, and the MoS is prepared by incubating at 800°C for 10, 30, and 60 minutes 2 / S-doped carbonsphere composite counter electrode

[0035] Fully disperse 50mg of carbon powder in 10mL of ethanol, add appropriate amount of MoCl 5 making MoCl 5 The concentration is 330mmol / L, and stir well. Then 100 μL of the above precursor solution was taken, and evenly drop-coated on three sets of 3 × 5 cm graphite paper, and then dried on a hot stage at 60 ° C for 10 min. Put the dried sample in a tube furnace, and take 1g of sulfur powder and place it at the end of the tube furnace near the air inlet, heat it up to 800 °C at a rate of 10 °C / min in an Ar atmosphere, and keep it warm for 10, 30, 60min, and then naturally cooled down to room temperature to obtain three groups of samples with different holding times. Figure 5 It is the SEM image of the obtained sample. It can be seen from the figure that the microscopic morpholog...

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Abstract

The invention discloses a preparation method of a molybdenum disulfide and sulfur-doped carbon sphere composite material counter electrode based on a dye-sensitized solar cell graphite paper substrate. The preparation method includes the following steps: adding an appropriate amount of carbon spheres into ethanol to form uniform carbon dispersion liquid by ultrasonic treatment; and then adding anappropriate amount of molybdenum pentachloride into the carbon dispersion liquid, applying drops on graphite paper treated with sodium hydroxide, drying, placing in a vacuum tube furnace, placing sulfur powder at the end close to an air inlet, performing heat preservation at 800DEG C in an argon atmosphere, and cooling to obtain a molybdenum disulfide and sulfur-doped carbon sphere composite material that grows on a graphite paper substrate. Molybdenum disulfide in the composite material has a large number of defects in the crystal lattice, and thus the composite material has more catalytic active sites, and the catalytic activity of the composite material as a counter electrode can be improved; and the molybdenum disulfide / sulfur-doped carbon sphere composite material counter electrode has excellent photoelectric properties and is obviously superior to a pure molybdenum disulfide counter electrode.

Description

technical field [0001] The invention relates to a dye-sensitized solar cell, in particular to a dye-sensitized solar cell counter electrode and a preparation method thereof. Background technique [0002] As one of the three pillars of the development of human society, energy has always attracted human attention. With the rapid development of modern society, human's demand for energy is increasing day by day. At present, traditional fossil energy such as coal, oil and natural gas is still the most widely used energy in the world. However, fossil energy reserves are limited and non-renewable. Under the rapid consumption of human beings, fossil energy is already facing the danger of depletion. In addition, when fossil energy is burned, it will release a large amount of greenhouse gas CO 2 and other harmful smoke and dust have brought a huge threat to the human ecological environment. In the 21st century, the energy crisis is a problem that human society must face. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G9/2022H01G9/2059Y02E10/542Y02P70/50
Inventor 黄妞丁玉岳孙小华孙盼盼
Owner CHINA THREE GORGES UNIV
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