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Transition metal-nitrogen co-doped carbon nanotube-mesoporous carbon composite counter electrode material for dye-sensitized solar cell

A technology of solar cells and transition metals, applied in electrolytic capacitors, circuits, capacitors, etc., can solve the problems of reducing electron transfer rate and charge transfer efficiency, large interface contact impedance, low photoelectric conversion efficiency, etc., to improve the interface electron transfer rate , Reduce interface contact resistance, good electrochemical stability

Pending Publication Date: 2022-05-13
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bonding strength between carbon isomorphs in the carbon matrix composites prepared by ex-situ mechanical mixing is low, and it is easy to form a homogeneous interface with poor electrical contact, resulting in a large interfacial contact resistance, thereby reducing the electron transport. rate and charge transfer efficiency, ultimately leading to poor catalytic activity and low photoelectric conversion efficiency

Method used

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  • Transition metal-nitrogen co-doped carbon nanotube-mesoporous carbon composite counter electrode material for dye-sensitized solar cell
  • Transition metal-nitrogen co-doped carbon nanotube-mesoporous carbon composite counter electrode material for dye-sensitized solar cell
  • Transition metal-nitrogen co-doped carbon nanotube-mesoporous carbon composite counter electrode material for dye-sensitized solar cell

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Effect test

Embodiment 1

[0037] 1) Place 3 g C 3 N 4 And 1 g of nickel acetate was added to 10 mL of deionized water, stirred and heated to form a sol, and then continued at 60 o Further heating under C forms a gel and transfer the obtained gel to a tubular furnace at 800 o Calcined in an inert atmosphere for 1 hour under C, one end of the embedded transition metal nickel, nitrogen-doped carbon nanotubes (Ni-NCNTs);

[0038] 2) Immerse 1 g of nickel / nitrogen co-doped carbon nanotubes (Ni-NCNTs) to 25 mL containing 8 g HNO 3 In an aqueous solution, the resulting suspension is transferred to a stainless steel hydrothermal reactor at 100 oHeated at C for 24 hours, the obtained product was then filtered, washed, dried, and the product after acid oxidation was obtained Ni-NCNTs-oxide; 3) The product Ni-NCNTs-oxide prepared by acid oxidation was added to 30 mL of an aqueous solution containing 1 g of glucose, 1 g of melamine and 0.3 g F127, and stirred for 0.5 hours to transfer the resulting suspension to an o...

Embodiment 2

[0053]Step (1) and (2) is the same as the preparation process of Example 1, in step 3), the product Ni-NCNTs-oxide prepared by acid oxidation is added to 30 mL of aqueous solution containing 2 g of glucose, 1 g of melamine with 0.5 g F127, and stirred for 0.5 h, the resulting suspension is transferred to an oven 60 o C evaporates for 24 h, followed by a colloidal product obtained at 800 o C in an inert atmosphere, heating for 1 h, finally obtain a dye-sensitized solar cell with transition metal / nitrogen co-doped carbon nanotubes @ mesoporous carbon shell (Ni-NCNTs@NMC-2) composite counter electrode material.

[0054] In addition, the mass percentage, morphological parameters, co-doped co-doped carbon nanotubes of transition metal / nitrogen co-doped carbon nanotubes obtained by scanning electron microscopy and transmission electron microscopy diagrams are shown in Table 1:

[0055] Table 1. The structure and electrochemical properties of the electrode material in the proportion and...

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Abstract

The invention discloses a transition metal / nitrogen co-doped carbon nanotube and mesoporous carbon shell composite counter electrode material for a dye-sensitized solar cell. The transition metal / nitrogen co-doped carbon nanotube and mesoporous carbon shell composite counter electrode material is composed of a transition metal / nitrogen co-doped carbon nanotube and a mesoporous carbon shell layer, the outer layer of the metal / nitrogen co-doped carbon nanotube is coated with the mesoporous carbon shell layer to form a tube-in-tube carbon special-shaped interface structure, the thickness of the mesoporous carbon shell layer in the composite counter electrode material is 50-200 nanometers, and the size of a mesoporous channel is 3-6 nanometers. The transition metal / nitrogen co-doped carbon nanotube-mesoporous carbon shell composite counter electrode material with specific chemical components and morphological structure provided by the invention shows the application advantages of lower charge transfer impedance, higher photoelectric conversion efficiency, better electrochemical stability and the like compared with a traditional Pt counter electrode in the application of a dye-sensitized solar cell; and the preparation process is simple, the cost is low, large-scale production is easy, and commercial application of the dye-sensitized solar cell is promoted.

Description

Technical field [0001] The present invention relates to the technical field of dye-sensitized solar cell counter electrode materials, specifically a dye-sensitized solar cell with transition metal / nitrogen co-doped carbon nanotubes @ mesoporous carbon shell composite counter electrode material and preparation method thereof. Background [0002] With the increasing consumption of fossil fuels, large carbon emissions, and serious environmental pollution, researchers at home and abroad have begun to explore new technologies that are green, environmentally friendly and can produce energy for a long time to achieve a long-term and stable supply of energy in the future. Dye-sensitized solar cells as a representative and very promising photoelectric conversion technology, because of the ability to efficiently and efficiently convert abundant, clean and pollution-free solar energy directly into electrical energy, and the device production process is simple and inexpensive, in recent y...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2022H01G9/042
Inventor 曾小兰舒爽刘俊王硕
Owner XINYANG NORMAL UNIVERSITY
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