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Method for manufacturing grapheme composite selenium and cobalt element counter electrode used in dye sensitized solar cell

A solar cell and graphene composite technology, applied in the field of electrochemistry, achieves the effects of good repeatability, high density, and simple operation methods

Inactive Publication Date: 2016-09-28
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, graphene has extraordinary electrical conductivity. In graphene, electrons can move extremely efficiently. Traditional conductors and semiconductor materials such as silicon and copper are far less good than graphene.

Method used

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Examples

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preparation example Construction

[0022] A preparation method for a graphene composite selenium and cobalt element counter electrode for dye-sensitized solar cells, using graphene, cobalt salt, and elemental selenium as main raw materials, and adding a reducing agent and a PVP catalyst to prepare graphene / cobalt, Selenium element composite counter electrode, the specific steps of its preparation are:

[0023] 1) Weigh 0.291 g of cobalt nitrate hexahydrate, add an appropriate amount of water to stir and dissolve, and prepare 200 ml of 5 mmol / L cobalt nitrate solution;

[0024] 2) Measure 5ml of 5 mM cobalt nitrate solution into a small beaker, weigh 0.004 g of graphene and 0.004 g of selenium powder into the small beaker, then add 1 mg of PVP into the beaker, and then weigh 9.9 mg of glucose Add in a small beaker; then add 2 ml of hydrazine hydrate in the small beaker, put the magnet, and stir the mixed solution on a magnetic stirrer for 20 minutes;

[0025] 3) Place FTO or ITO conductive glass obliquely in th...

Embodiment 1

[0031] 1. Weigh 0.291 g of cobalt nitrate hexahydrate, add an appropriate amount of water and stir to dissolve, and prepare 200 ml of 5 mmol / L cobalt nitrate solution.

[0032] 2. Measure 5 ml of 5 mM cobalt nitrate solution into a small beaker, weigh 0.004 g of graphene and 0.004 g of selenium powder into the small beaker, then add 1 mg of PVP into the beaker, and then weigh 9.9 mg Glucose was added to the small beaker; then 2 ml of hydrazine hydrate was added to the small beaker, after the magnet was placed, the mixed solution was placed on a magnetic stirrer and stirred for 20 minutes.

[0033] 3. Place conductive glass (FTO or ITO) obliquely in the autoclave, then add the solution that has been stirred evenly into the autoclave, use deionized water to adjust the volume to 3 / 4 of the volume of the autoclave, tighten the autoclave, and put the reaction The kettle was transferred to a constant temperature blast drying oven for hydrothermal reaction at 100 °C for 12 h. After ...

Embodiment 2

[0035] 1. Weigh 0.291 g of cobalt nitrate hexahydrate, add an appropriate amount of water and stir to dissolve, and prepare 200 ml of 5 mmol / L cobalt nitrate solution.

[0036] 2. Measure 5 ml of 5 mM cobalt nitrate solution into a small beaker, weigh 0.008 g of graphene and 0.004 g of selenium powder into the small beaker, then add 2 mg of PVP into the beaker, and then weigh 20 mg Glucose was added to the small beaker; then 4 ml of hydrazine hydrate was added to the small beaker, after the magnet was placed, the mixed solution was placed on a magnetic stirrer and stirred for 20 minutes.

[0037] 3. Place conductive glass (FTO or ITO) obliquely in the autoclave, then add the solution that has been stirred evenly into the autoclave, use deionized water to adjust the volume to 3 / 4 of the volume of the autoclave, tighten the autoclave, and put the reaction The kettle was transferred to a constant temperature blast drying oven with water heating at 120°C for 12 h. After the react...

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Abstract

The invention discloses a method for manufacturing a counter electrode used in a dye sensitized solar cell (DSSC) with a composite selenium and cobalt ion which has a graphene film as a carrier. The method including the following steps: using a graphene, an element selenium, and a cobalt nitrate hexahydrate as raw materials, adding a reductant glucose, a hydrazine hydrate, and a catalyst polyvinylpyrrolidone (PVP), reacting the raw materials with the reductant glucose, the hydrazine hydrate, and the catalyst polyvinylpyrrolidone (PVP) for 12 hours under 100 degrees so as to obtain a graphene film counter electrodethat contains selenium and cobalt, cleaning a reaction product with an absolute ethyl alcohol for three times, and drying the reaction product at room temperature. A reaction container is a stainless steel reaction vessel which has a polytetrafluoroethylene as an inner container, and a solution has a concentration of 5 mmo1 / L. According to the invention, the method is easy to operate, has short reaction time, excellent repeatability, and low cost. The manufactured film has tight structure and even element distribution. The method can be applied to industrial production and technology promotion of DDSC counter electrodes.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and mainly relates to a preparation method of a graphene composite selenium and cobalt element counter electrode used for a dye-sensitized solar cell. Background technique: [0002] Dye-sensitized solar cell (DSSC), as an environmentally friendly and efficient new solar cell, has the advantages of simple production process, less environmental pollution, less energy consumption in the preparation process, less dependence on ambient temperature, and low cost. Its commercial application value is also becoming more and more obvious. [0003] In dye-sensitized solar cells, the counter electrode is the positive electrode of the battery, and its main function is to accept electrons in the external circuit of the battery and transfer these electrons to the redox electron pair of the electrolyte. Most of the traditional dye-sensitized solar cells use Pt as the counter electrode, and Pt is the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2022Y02E10/542Y02P70/50
Inventor 李品将李学峰王玉丹谢俊俊豆燕飞
Owner XUCHANG UNIV
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