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Preparation method of sulfide nano-compound counter electrode based on porous CuS architecture

A nanocomposite and sulfide technology, applied in the field of quantum dot-sensitized solar cells, can solve the problems of photoanode poisoning, increased contact resistance, and reduced adhesion, and achieve improved battery performance, improved catalytic activity, and improved electrode stability. sexual effect

Active Publication Date: 2017-06-13
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the cells with the best efficiency regarding various quantum dot sensitization, Cu x One of the advantages of the S counter electrode is that the loose microstructure has high catalytic activity, and the other is that the copper foil substrate has excellent conductivity; one of the disadvantages is that the electrode is sticky due to the continuous corrosion of the substrate by the electrolyte. Adhesion decreases, contact resistance increases, and the second is that the shedding counter electrode contacts the photoanode and causes photoanode poisoning

Method used

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  • Preparation method of sulfide nano-compound counter electrode based on porous CuS architecture
  • Preparation method of sulfide nano-compound counter electrode based on porous CuS architecture

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Embodiment 1

[0045] The preparation method of the sulfide nanocomposite counter electrode based on the porous CuS framework is specifically implemented according to the following steps:

[0046] Step 1, preparing CuS nanopowder;

[0047] Step 1.1, use a magnetic stirrer to equip Na with a concentration of 0.4M 2 S aqueous solution and CuSO 4 aqueous solution;

[0048] Step 1.2, Na 2 S aqueous solution was slowly injected into CuSO 4 In the aqueous solution, the CuS precipitate obtained by the reaction was collected by centrifugation after sufficient reaction;

[0049] Step 1.3, using deionized water to wash the CuS precipitate obtained in step 1.2 3-5 times, and then using absolute ethanol to wash the CuS precipitate 3-5 times;

[0050] Step 1.4, place the washed CuS precipitate in a vacuum drying oven at 40°C for drying, and finally grind and disperse the dried CuS precipitate into CuS nanopowder;

[0051] Step 2, making CuS slurry from the CuS nanopowder prepared in step 1;

[005...

Embodiment 2

[0068] The preparation method of the sulfide nanocomposite counter electrode based on the porous CuS framework is specifically implemented according to the following steps:

[0069] Step 1, preparing CuS nanopowder;

[0070] Step 1.1, use a magnetic stirrer to equip Na with a concentration of 0.5M 2 S aqueous solution and CuSO 4 aqueous solution;

[0071] Step 1.2, Na 2 S aqueous solution was slowly injected into CuSO 4 In the aqueous solution, the CuS precipitate obtained by the reaction was collected by centrifugation after sufficient reaction;

[0072] Step 1.3, using deionized water to wash the CuS precipitate obtained in step 1.2 3-5 times, and then using absolute ethanol to wash the CuS precipitate 3-5 times;

[0073] Step 1.4, place the washed CuS precipitate in a vacuum oven at 50°C for drying, and finally grind and disperse the dried CuS precipitate into CuS nanopowder;

[0074] Step 2, making CuS slurry from the CuS nanopowder prepared in step 1;

[0075] Step...

Embodiment 3

[0092] The preparation method of the sulfide nanocomposite counter electrode based on the porous CuS framework is specifically implemented according to the following steps:

[0093] Step 1, preparing CuS nanopowder;

[0094] Step 1.1, use a magnetic stirrer to equip Na with a concentration of 0.6M 2 S aqueous solution and CuSO 4 aqueous solution;

[0095] Step 1.2, Na 2 S aqueous solution was slowly injected into CuSO 4 In the aqueous solution, the CuS precipitate obtained by the reaction was collected by centrifugation after sufficient reaction;

[0096] Step 1.3, using deionized water to wash the CuS precipitate obtained in step 1.2 3-5 times, and then using absolute ethanol to wash the CuS precipitate 3-5 times;

[0097] Step 1.4, place the washed CuS precipitate in a vacuum drying oven at 60°C for drying, and finally grind and disperse the dried CuS precipitate into CuS nanopowder;

[0098] Step 2, making CuS slurry from the CuS nanopowder prepared in step 1;

[009...

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Abstract

The invention discloses a preparation method of a sulfide nano-compound counter electrode based on a porous CuS architecture. The preparation method comprises the following steps that CuS nano powder is prepared; the CuS nano powder is prepared into CuS slurry; a porous CuS nanosheet counter electrode is prepared by utilizing the CuS slurry; the porous CuS counter electrode is utilized to prepare the sulfide nano-compound counter electrode based on the porous CuS architecture. The preparation method is simple in process, low in cost, capable of achieving large-area preparation and good in repeatability, the prepared sulfide nano-compound counter electrode has the advantages that electrons are rapidly transmitted and the electrode stability is improved by utilizing a TiO2 shell layer, the transmission resistance of electrons in an electrolytic solution is reduced by utilizing macroporous structures among CuS nanosheets, the catalytic activity is improved by utilizing the synergistic effect of compound sulfide, and the method makes battery performance greatly improved.

Description

technical field [0001] The invention belongs to the technical field of quantum dot-sensitized solar cells, and in particular relates to a method for preparing a sulfide nanocomposite counter electrode based on a porous CuS framework. Background technique [0002] In recent years, with the continuous increase of people's demand for energy and the continuous decrease of fossil fuel reserves, it has become one of the important topics of current scientific research to find a new source of abundant, green and environmentally friendly alternative energy. As an inexhaustible natural energy source, solar energy has attracted worldwide attention, especially the research on solar cells that directly convert solar energy into electrical energy has become a hot research topic at present. [0003] Quantum dot-sensitized solar cells (QDSSC) are the third-generation solar cells that appeared in the 1990s, which use narrow-bandgap inorganic semiconductor quantum dots (QD) to sensitize wide-...

Claims

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Application Information

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IPC IPC(8): H01G9/20
CPCH01G9/2022H01G9/2054Y02E10/542Y02P70/50
Inventor 邓建平傅明星张鹏超吕海立
Owner SHAANXI UNIV OF TECH
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