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Mesoporous graphite/silicon dioxide composite counter electrode for dye sensitized solar cells and method for preparing mesoporous graphite/silicon dioxide composite counter electrode

A mesoporous graphene and solar cell technology, applied in the field of dye-sensitized solar cells, can solve the problems of high cost and high energy consumption of platinum counter electrodes, and achieve the effects of good energy conversion efficiency, high catalytic activity and mild conditions

Inactive Publication Date: 2012-10-03
江苏有则创投集团有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a mesoporous graphene / silicon dioxide composite counter electrode with simple process, mild conditions, low price and high catalytic activity for the disadvantages of traditional platinum counter electrode, such as high cost and high energy consumption. its preparation method

Method used

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  • Mesoporous graphite/silicon dioxide composite counter electrode for dye sensitized solar cells and method for preparing mesoporous graphite/silicon dioxide composite counter electrode
  • Mesoporous graphite/silicon dioxide composite counter electrode for dye sensitized solar cells and method for preparing mesoporous graphite/silicon dioxide composite counter electrode
  • Mesoporous graphite/silicon dioxide composite counter electrode for dye sensitized solar cells and method for preparing mesoporous graphite/silicon dioxide composite counter electrode

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Experimental program
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Effect test

Embodiment 1

[0019] Add 5 mg of silica nanoparticles with a particle size of 10 nm to 10 mL of 0.25 mg / mL graphene oxide aqueous suspension, and form graphene oxide / silica with a mass ratio of 1:2 after ultrasonic dispersion Then add 25 μL of hydrazine hydrate solution with a mass fraction of 10% to the suspension, heat the reaction at 100°C for 2 hours, and then reduce the graphene oxide to graphene to form mesoporous graphene / Suspensions of silica nanocomposites with a mesoporous structure and a specific surface area of ​​229.0 m 2 / g, the pore size is 4 nm and has a narrow distribution (as shown in the accompanying drawings figure 2 shown). Finally, drop the suspension on the cleaned conductive glass. After the water evaporates completely, a layer of apparently uniform mesoporous graphene / silicon dioxide film is formed on the conductive glass. Repeat the above operation to regulate the thickness of the film to 2.5 μm, that is, the mesoporous graphene / silicon dioxide composite counte...

Embodiment 2

[0022] Add 0.5 mg of silica nanoparticles with a particle size of 50 nm to 10 mL of 0.1 mg / mL graphene oxide aqueous suspension, and form graphene oxide / silica with a mass ratio of 1:0.5 after ultrasonic dispersion Then add 10 μL of hydrazine hydrate solution with a mass fraction of 10% to the suspension, heat the reaction at 110°C for 1 h, and then reduce the graphene oxide to graphene to form mesoporous graphene / Suspension of silica nanocomposite material; finally drop the suspension on the cleaned conductive glass, and form a layer of apparently uniform mesoporous graphene / silicon dioxide film on the conductive glass after the water evaporates completely , repeating the above operations to adjust the thickness of the membrane to 1 μm, that is, the mesoporous graphene / silicon dioxide composite counter electrode is obtained. This electrode was then used as a counter electrode in dye-sensitized solar cells.

[0023] The counter electrode was assembled into DSSCs according to...

Embodiment 3

[0025] Add 50 mg of silica nanoparticles with a particle size of 100 nm to 10 mL of 1 mg / mL graphene oxide aqueous suspension, and form a graphene oxide / silica composite with a mass ratio of 1:5 after ultrasonic dispersion. suspension; then add 100 μL of hydrazine hydrate solution with a mass fraction of 10% to the suspension, heat and react at 60°C for 12 hours, and then reduce the graphene oxide in it to graphene to form mesoporous graphene / silica nano Suspension of composite material; finally drop the suspension on the cleaned conductive glass, and form a layer of apparently uniform mesoporous graphene / silicon dioxide film on the conductive glass after the water evaporates completely, repeat the above operations Regulating the thickness of the membrane to be 20 μm, the mesoporous graphene / silicon dioxide composite counter electrode is obtained. This electrode was then used as a counter electrode in dye-sensitized solar cells.

[0026] The counter electrode was assembled in...

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Abstract

The invention discloses a mesoporous graphite / silicon dioxide composite counter electrode for dye sensitized solar cells and a method for preparing the mesoporous graphite / silicon dioxide compound counter electrode, the composite counter electrode consists of an electric conduction substrate and a mesoporous graphite / silicon dioxide composite membrane, and is prepared in the following steps that: firstly, adding silicon dioxide nano-particles into graphite oxide suspension, and putting in the hydrazine hydrate solution after ultrasonic dispersion for reduction, and heating the mixture at 60-110 DEG C for reaction for 1-12 hours, thus forming the mesoporous graphite / silicon dioxide nanocomposite suspension; and dripping the suspension onto the clean electric conduction substrate for forming the mesoporous graphite / silicon dioxide membrane, regulating the thickness of the membrane to 1-20mum through repeating the operation, namely forming the composite counter electrode. The mesoporous graphite / silicon dioxide composite counter electrode has a simple technology and moderate conditions, the produced counter electrode has high catalytic activity and is low in cost, so the cost of the counter is greatly decreased, and the mesoporous graphite / silicon dioxide composite counter electrode is expected to be applied in the mass industrial production of the dye sensitized solar cells.

Description

technical field [0001] The invention relates to the field of dye-sensitized solar cells, in particular to a mesoporous graphene / silicon dioxide composite counter electrode for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] The current consumption of renewable energy and the continuous intensification of energy pressure faced by human beings make it obvious that the research and development of solar cells is of great significance. Dye-sensitized solar cells (DSSCs) are a new type of photoelectrochemical solar cells. Since the research team led by Professor M. Gr? High photoelectric conversion efficiency and other characteristics have quickly attracted widespread attention from the international academic and industrial circles, and developed countries such as Europe, the United States, and Japan have invested a lot of money in research and development. [0003] DSSCs mainly consist of dye-sensitized porous semiconductor nanocrystal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542Y02P70/50
Inventor 王忠胜宫峰周刚吴伟忠李汉华常清付世创
Owner 江苏有则创投集团有限公司
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