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Preparation method of leafy biomass pyrolytic carbon counter electrode for dye-sensitized solar cell

A technology of biomass pyrolysis and solar cells, which is applied in the field of preparation of leaf-shaped biomass pyrolytic carbon counter electrodes, can solve the problems of unfavorable environment-friendly electrodes and poor process complexity, and achieve high value-added applications and simple processes , the effect of rich raw materials

Inactive Publication Date: 2016-06-29
XINYU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the process complexity and relatively poor environmental friendliness of the carbonaceous precursors (mainly various synthetic resins) used to synthesize porous carbons also have an adverse effect on carbon electrodes.

Method used

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  • Preparation method of leafy biomass pyrolytic carbon counter electrode for dye-sensitized solar cell
  • Preparation method of leafy biomass pyrolytic carbon counter electrode for dye-sensitized solar cell
  • Preparation method of leafy biomass pyrolytic carbon counter electrode for dye-sensitized solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 1) Pyrolysis: Ultrasonic cleaning of bamboo leaves in N 2 Carry out pyrolysis under protection, rise from room temperature to 700°C, keep warm for 1 hour, and the heating rate is 10°C / min, after completing pyrolysis, cool to room temperature with the furnace to obtain pyrolytic charcoal;

[0031] 2) Mixing: Firstly, the pyrolytic carbon is subjected to particle refinement treatment, then the pyrolytic carbon and the aqueous ethanol solution are mixed evenly by grinding for 1 hour at a weight ratio of 1:20, and finally carboxymethyl fiber with 10% weight of the pyrolytic carbon is added Element, obtain mixed slurry by grinding 0.5h;

[0032] 3) Coating: the mixed slurry is deposited on the transparent conductive glass by scraping method, and the thickness of the coating is 20 μm;

[0033] 4) Drying: heat the product obtained in step 3) at 120° C. for 2 hours to obtain a leaf-shaped biomass pyrolytic carbon counter electrode for dye-sensitized solar cells.

[0034] The ...

Embodiment 2

[0039] 1) Pyrolysis: the pine needles after ultrasonic cleaning were heated in N 2 Carry out pyrolysis under protection, raise the temperature from room temperature to 1000°C at a rate of 10°C / min, keep it warm for 1 hour, and cool to room temperature with the furnace after completing pyrolysis to obtain pyrolytic carbon; among them, the specific surface area of ​​pyrolytic carbon is 495m 2 / g.

[0040] 2) Mixing: Firstly, the pyrolytic carbon is subjected to particle refinement treatment, then the pyrolytic carbon and the aqueous ethanol solution are mixed evenly by grinding for 1 hour at a weight ratio of 1:10, and finally hydroxyethyl fiber with 5% weight of the pyrolytic carbon is added Element, obtain mixed slurry by grinding 0.5h;

[0041] Among them, the particle refinement treatment is completed by ball milling, the number of revolutions of the ball mill is 400r / min, the ball-to-material ratio is 70:15, and the ball milling time is 2h; the aqueous ethanol solution is st...

Embodiment 3

[0045] 1) Pyrolysis: the bay leaves after ultrasonic cleaning were heated in N 2 Carry out pyrolysis under protection, raise the temperature from room temperature to 800°C at a rate of 10°C / min, keep it warm for 1 hour, and cool down to room temperature with the furnace after completing pyrolysis to obtain pyrolytic carbon; among them, the specific surface area of ​​pyrolytic carbon is 190m 2 / g.

[0046] 2) Mixing: First, refine the pyrolytic charcoal particles, then mix the pyrolytic charcoal and ethanol aqueous solution by grinding for 1 hour at a weight ratio of 1:15, and finally add methyl cellulose with 15% pyrolytic charcoal weight With the mixture of hydroxypropyl cellulose, the mixed slurry is obtained by grinding for 0.5h;

[0047] Among them, the particle refinement treatment is completed by ball milling, the number of revolutions of the ball mill is 600r / min, the mass ratio of the ball to material is 70:15, and the ball milling time is 2h; the ethanol aqueous solu...

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Abstract

The invention provides a preparation method of a leafy biomass pyrolytic carbon counter electrode for a dye-sensitized solar cell. The method comprises the following steps: firstly, carrying out heat preservation on cleaned leafy biomass at 700-1000 DEG C under N2 protection to obtain pyrolytic carbon; preparing mixed slurry from the pyrolytic carbon subjected to grain-refinement treatment together with a binder and an ethanol solution; an depositing the mixed slurry on a conductive base, and drying the mixed slurry. The pyrolytic carbon in the leafy biomass pyrolytic carbon counter electrode has a multistage aperture structure; unidirectionally distributed macropores provide effective channels for penetration of an electrolyte and diffusion of redox couples in the electrolyte; a large number of mesopores increase the number of catalytic activity points by increasing the superficial area; and obtaining of the counter electrode with relatively good catalytic activity is facilitated. The preparation method can achieve the targets of being friendly to environment and wide in source, has a high value-added application of renewable leafy biomass and has obvious advantages of being abundant in raw materials, friendly to environment and the like; and the technological process is highly integrated and simple.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a method for preparing a leaf-shaped biomass pyrolysis carbon counter electrode used for dye-sensitized solar cells. Background technique [0002] Since the advent of dye-sensitized solar cells, due to its low manufacturing cost, high conversion efficiency and easy flexibility, it has attracted the attention of researchers and entrepreneurs from all over the world. In 2009, the British G24i company was the first to launch a low-power product in the world. It consists of four parts: a photoanode, a sensitizer, an electrolyte, and a counter electrode. counter electrode), which plays an important role in the catalytic reduction electrolyte. However, the use of platinum not only increases the cost of the device, but also is easily corroded due to prolonged immersion in the electrolyte (generating PI 4 ), leading to a decrease in device stability. In addition, the relatively hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542H01G9/2022H01G9/2045
Inventor 徐顺建罗玉峰钟炜肖宗湖罗永平欧惠吴欢文
Owner XINYU UNIV
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