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Dye-sensitized solar cell counter electrode and its preparation method and application

An electrode and base electrode technology, applied in the field of dye-sensitized solar cells, can solve problems such as uncontrollable internal pore structure and affect electrochemical performance, and achieve the effects of improving electrocatalytic activity and conductivity, low production cost, and environmental friendliness.

Active Publication Date: 2018-11-23
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current graphene gel is usually directly obtained from graphite oxide by hydrothermal method, and its internal pore structure is not controllable, which will affect its electrochemical performance to a certain extent.

Method used

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  • Dye-sensitized solar cell counter electrode and its preparation method and application
  • Dye-sensitized solar cell counter electrode and its preparation method and application
  • Dye-sensitized solar cell counter electrode and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Take 300ml of secondary water and add it into a 1L flask, keep the temperature at 70°C and the speed at 400r / min. Add 0.1g sodium styrene sulfonate, 55ml styrene, and react for 20min. Add 1 g of potassium persulfate, 150 ml of secondary water, and polymerize for 18 hours under a nitrogen-protected atmosphere to obtain a suspension of PS spheres with a diameter of 180 nm. The PS sphere suspension was centrifuged and washed three times with secondary water and ethanol respectively, and the finally obtained pure PS sphere was diluted with water to 30 mg / mL. Take 4ml of the above PS sphere suspension and add it to 25ml of GO dispersion with a concentration of 2.5mg / ml, and sonicate for 30min. Add 0.8 g of thiourea, continue to sonicate for 10 min, add 3 drops of ammonia water dropwise, and adjust the pH to 10. The above reaction solution was transferred to a 50mL reactor and reacted at 160°C for 20h. The obtained graphene gel was freeze-dried at -45°C for 48 hours to obt...

Embodiment 2

[0070] Take 350ml of secondary water and add it into a 1L flask, keep the temperature at 70°C and the rotation speed at 400r / min. Add 0.05g sodium styrene sulfonate, 55ml styrene, and react for 30min. Add 1 g of potassium persulfate, 100 ml of secondary water, and polymerize for 20 h under a nitrogen-protected atmosphere to obtain a mixed suspension of PS spheres with a diameter of 130 nm / 170 nm / 230 nm. The PS sphere suspension was centrifuged and washed three times with secondary water and ethanol respectively, and the finally obtained pure PS sphere was diluted with water to 30 mg / mL. Take 4ml of the above PS sphere suspension and add it to 25ml of GO dispersion with a concentration of 2.5mg / ml, and sonicate for 30min. Add 0.8 g of thiourea, continue to sonicate for 10 min, add 3 drops of ammonia water dropwise, and adjust the pH to 10. The above reaction solution was transferred to a 50mL reactor and reacted at 160°C for 15h. The obtained graphene gel was freeze-dried at...

Embodiment 3

[0074] Take 350ml of secondary water and add it into a 1L flask, keep the temperature at 80°C and the rotation speed at 350r / min. Add 0.75g sodium styrene sulfonate, 50ml styrene, and react for 30min. Add 1 g of potassium persulfate, 100 ml of secondary water, and polymerize for 18 hours under a nitrogen-protected atmosphere to obtain a suspension of PS spheres with a diameter of 85 nm. The PS sphere suspension was centrifuged and washed three times with secondary water and ethanol respectively, and the finally obtained pure PS sphere was diluted with water to 30 mg / mL. Take 2ml of the above PS sphere suspension and add it to 25ml of GO dispersion with a concentration of 2.5mg / ml, and sonicate for 30min. Add 1 g of thiourea, continue to sonicate for 5 minutes, add 3 drops of ammonia water dropwise, and adjust the pH to 10. The above reaction solution was transferred to a 50mL reactor and reacted at 160°C for 15h.

[0075] The drying and carbonization steps are the same as i...

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Abstract

The invention provides a dye-sensitized solar cell counter electrode as well as a preparation method and application of the dye-sensitized solar cell counter electrode, a preparation method of a nano-controllable 3D porous graphene counter electrode which is used for DSSCs, high in catalytic activity, high in conductivity and low in cost, and application thereof. The preparation method comprises the following steps: uniformly mixing PS ball suspension and a GO liquid, ultrasonically dispersing, adding thiourea, ultrasonically dispersing again to obtain the mixed liquid; reacting the mixed liquid under high temperature, drying the obtained graphene gel to obtain a PS ball / graphene gel compound; carbonizing the PS ball / graphene gel compound to obtain the PS ball regulatory nano-controllable 3D porous graphene; commonly grinding the PS ball regulatory nano-controllable 3D porous graphene and terpilenol to obtain pulp; coating the surface of a base electrode with the obtained pulp to obtain the nano-controllable 3D porous graphene counter electrode. The controllable preparation of the 3D porous graphene is realized; being as the DSSCs counter-electrode material, the 3D porous graphene is high in photoelectric conversion efficiency, and the application prospect in the storage field is bright. According to the preparation method, steps are simple, the operation is convenient and the practicability is strong.

Description

technical field [0001] The invention belongs to the technical field of dye-sensitized solar cells, and relates to a method for preparing a counter electrode of a nano-controllable 3D porous graphene dye-sensitized solar cell and an application thereof. Background technique [0002] Dye-sensitized solar cells (DSSCs) have the advantages of high conversion efficiency, simple and environmentally friendly preparation process, and low cost, and are expected to replace traditional silicon-based solar cells to provide clean energy for human beings. The commonly used counter electrode material for DSSCs is the noble metal platinum. However, as a noble metal, platinum is expensive, has limited reserves in nature, and is easily corroded by iodine-based electrolytes. Therefore, many researchers are working on carbon materials to replace platinum. [0003] Graphene, as a single atomic layer two-dimensional carbon material, has excellent electrochemical properties, optical properties an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184H01G9/20H01G9/042
CPCY02E10/542
Inventor 王宗花卢冰夏建飞赵凯
Owner QINGDAO UNIV
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