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A preparation method of monolithic paper-carbon counter electrode for dye-sensitized solar cells

A technology for solar cells and dye sensitization, which is applied in the field of preparation of monolithic paper charcoal counter electrodes to achieve the effects of avoiding electron loss, avoiding shedding, and abundant raw materials

Inactive Publication Date: 2017-11-14
XINYU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long-term stability of carbon counter electrodes is still an open issue.

Method used

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  • A preparation method of monolithic paper-carbon counter electrode for dye-sensitized solar cells
  • A preparation method of monolithic paper-carbon counter electrode for dye-sensitized solar cells
  • A preparation method of monolithic paper-carbon counter electrode for dye-sensitized solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Film making:

[0036] First, heat the paper from 60°C to 180°C at a rate of 1°C / h and keep it warm for 16 hours; 2 Carry out pyrolysis under protection, specifically: raise the temperature from room temperature to 800 °C at a rate of 1 °C / min and keep it warm for 1 hour. After completing the pyrolysis, cool to room temperature with the furnace to obtain a paper charcoal film.

[0037] 2) Glue matching:

[0038] According to the weight ratio of cellulose: water=1:40, cellulose and water are evenly mixed to obtain cellulose colloid;

[0039] 3) Coating:

[0040] Depositing the cellulose colloid on the conductive substrate by a spin coating method to obtain a thin layer of cellulose colloid covering the conductive substrate;

[0041] 4) Lamination:

[0042] Attaching a paper charcoal film to a thin layer of cellulose colloid on a conductive substrate;

[0043] 5) Drying:

[0044] The coated conductive substrate was dried in an air atmosphere at 180° C. for 0.5 h t...

Embodiment 2

[0054] 1) Film making:

[0055] First, heat the paper from 60°C to 160°C at a rate of 1°C / h and keep it warm for 32 hours; 2 Carry out pyrolysis under protection, specifically: raise the temperature from room temperature to 700 °C at a rate of 1 °C / min and keep it warm for 1 hour. After completing the pyrolysis, cool to room temperature with the furnace to obtain a paper charcoal film.

[0056] 2) Glue matching:

[0057] According to the weight ratio of cellulose: water=1:90, cellulose and water are evenly mixed to obtain cellulose colloid;

[0058] 3) Coating:

[0059] Depositing the cellulose colloid on the conductive substrate by spraying to obtain a thin layer of cellulose colloid covered on the conductive substrate;

[0060] 4) Lamination:

[0061] Attaching a paper charcoal film to a thin layer of cellulose colloid on a conductive substrate;

[0062] 5) Drying:

[0063] The coated conductive substrate was dried at 120° C. for 1 h in an air atmosphere to obtain a mo...

Embodiment 3

[0072] 1) Film making:

[0073] First, heat the paper from 60°C to 170°C at a rate of 1°C / h and keep it warm for 23 hours; 2 Carry out pyrolysis under protection, specifically: raise the temperature from room temperature to 1000°C at a rate of 1°C / min and keep it warm for 0.5h. After completing the pyrolysis, cool to room temperature with the furnace to obtain a paper charcoal film.

[0074] 2) Glue matching:

[0075] By cellulose: the weight ratio of water=1:65, cellulose and water are uniformly mixed, obtain cellulose colloid;

[0076] 3) Coating:

[0077] Depositing the cellulose colloid on the conductive substrate by spraying to obtain a thin layer of cellulose colloid covered on the conductive substrate;

[0078] 4) Lamination:

[0079] Attaching a paper charcoal film to a thin layer of cellulose colloid on a conductive substrate;

[0080] 5) Drying:

[0081] The coated conductive substrate was dried at 80° C. for 2 h in an air atmosphere to obtain a monolithic pape...

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Abstract

Provided is a method for preparing an integral paper carbon counter electrode of a dye-sensitized solar cell. The method comprises: keeping paper at the temperature between 160 and 180 degrees centigrade; keeping paper at the temperature between 600 and 1000 degrees centigrade under the protection of N2 in order to obtain a paper carbon film; depositing cellulose colloid on a conductive substrate by using a spin-coating method or spraying method in order to obtain a cellulose colloid thin layer covering the conductive substrate; and enabling the paper carbon film to adhere to the cellulose colloid thin layer and then drying the paper carbon film and the cellulose colloid thin layer. The method may effectively solve a defect of forming a catalyst layer by bonding powder carbon material in the prior art and prevents loose carbon powders from falling from the conductive substrate. Besides an improvement in stability, complete long carbon fiber in the paper carbon film catalyst layer simultaneously provides an effective channel for introduction of electrons of an external circuit, prevents electron losses due to a binder, and enables the electrons of the external circuit to be fast transmitted to a carbon fiber surface to participate in electrolyte reduction.

Description

technical field [0001] The invention relates to the field of new energy technologies, in particular to a method for preparing an integral paper-carbon counter electrode for a dye-sensitized solar cell. Background technique [0002] Since the advent of dye-sensitized solar cells, due to their low price (about 1 / 4 to 1 / 5 of crystalline silicon solar cells), high conversion efficiency, flexibility, and easy integration of photovoltaic buildings, It has attracted extensive attention from research institutions and enterprises in various countries. 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 of iodide triion in the 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 el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542Y02P70/50
Inventor 徐顺建罗玉峰钟炜肖宗湖罗永平欧惠
Owner XINYU UNIV
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