Flexible platinized counter electrode, and preparation method and application thereof

A flexible conductive and electrode technology, applied in the direction of circuits, capacitors, electrolytic capacitors, etc., can solve the problems of poor mechanical strength, high platinum loading of electrodes, and unusability, and achieve high photoelectric conversion performance, high mechanical stability, and equipment less demanding effect

Inactive Publication Date: 2012-06-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires high-temperature sintering, so it cannot be used in the preparation of platinum-supported counter electrodes based on conductive polymers.
[0004] Magnetron sputtering and vacuum evaporation can prepare high-performance platinum-loaded counter electrodes at low temperature, which can be applied to the preparation of flexible counter electrodes, but this preparation method requires expensive equipment and harsh preparation conditions. The amount of platinum loaded on the counter electrode is very high, which greatly increases the preparation cost of the electrode
[0005] Electrochemical reduction and electrophoretic deposition can also prepare platinum-loaded counter electrodes under low temperature conditions, but the stability and repeatability of platinum-loaded counter electrodes prepared by these methods are not good
[0006] The chemical reduction method is also a method commonly used to prepare platinum-loaded counter electrodes at low temperature, but the counter electrodes prepared by this method have poor performance and poor mechanical strength, which is not conducive to the long-term use of the electrodes

Method used

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  • Flexible platinized counter electrode, and preparation method and application thereof
  • Flexible platinized counter electrode, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1: Preparation of Platinum-loaded Counter Electrode

[0045] a. Prepare a platinum-loaded counter electrode with a flexible conductive polymer film ITO / PEN as the substrate. The thickness of the substrate is 300 μm, the light transmittance is 75%, and the surface sheet resistance is 15Ω / □;

[0046] b. Ultrasonic cleaning the substrate with detergent solution, acetone, and distilled water for 5 minutes in sequence, and after drying, fix its surroundings on the spin coater with adhesive tape;

[0047] c. Spin-coat a 1 mM tetrabutyl titanate solution in isopropanol / n-butanol (volume ratio of isopropanol / n-butanol is 1:1) on a conductive substrate at a rotation speed of 500 rpm for a time for 20S;

[0048] d. The substrate treated in step c is dried in an oven at 100°C for 30 minutes, boiled in distilled water at 100°C for 1 hour, and then dried in an oven at 100°C for 30 minutes to obtain TiO 2 Modified substrates, where TiO 2 The thickness of the layer is about 4...

Embodiment 2

[0053] Example 2: Preparation of Platinum-loaded Counter Electrode

[0054] a. Prepare a platinum-loaded counter electrode with a flexible conductive polymer film ITO / PET as the substrate. The thickness of the substrate is 200 μm, the light transmittance is 70%, and the surface sheet resistance is 60Ω / □;

[0055] b. Ultrasonic cleaning the substrate with detergent solution, acetone, and distilled water for 5 minutes in sequence, and after drying, fix its surroundings on the spin coater with adhesive tape;

[0056] c. Spin-coat the isopropanol / n-butanol solution of 1000mM tetrabutyl titanate (the volume ratio of isopropanol / n-butanol is 9:1) on the conductive substrate, the rotation speed is 1000 rpm, and the time is for 30S;

[0057] d. The substrate treated in step c is dried in an oven at 100°C for 30 minutes, then boiled in distilled water at 100°C for 2 hours, and then dried in an oven at 100°C for 30 minutes to obtain TiO 2 Modified substrates, where TiO 2 The thicknes...

Embodiment 3

[0062] Example 3: Preparation of Platinum-loaded Counter Electrode

[0063] a. Prepare a platinum-loaded counter electrode with a titanium sheet as a substrate, and the thickness of the substrate is 300 μm;

[0064] b. Polish the titanium sheet with fine sandpaper (1000 mesh) until it is bright, then use detergent solution and distilled water to ultrasonically clean it for 20 minutes, and after drying, fix the two sides on the horizontal table with adhesive tape;

[0065] c. Add 100mM tetrabutyl titanate in isopropanol / n-butanol solution (volume ratio of isopropanol / n-butanol is 1:1) dropwise on the substrate, let it spread naturally, and let it dry in the air Dry;

[0066] d.d. The substrate treated in step c is dried in an oven at 100°C for 30 minutes, then boiled in distilled water at 100°C for 2 hours, and then dried in an oven at 100°C for 30 minutes to obtain TiO 2 Modified substrates, where TiO 2 The thickness of the layer is 20 nm;

[0067] e. Configure a platinum-...

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Abstract

The invention discloses a flexible platinized counter electrode, and a preparation method and application thereof. The preparation method for the flexible platinized counter electrode comprises the following steps of: 1) preparing a TiO2 layer on a flexible substrate to obtain the flexible substrate modified by the TiO2 layer; and 2) depositing platinum on the TiO2 layer at room temperature by taking a platinum salt as a precursor, taking an alcohol solvent dissolving the platinum salt as a hole scavenger and using an ultraviolet in-situ reduction method to obtain the flexible platinized counter electrode. The preparation method for the flexible platinized counter electrode is simple and low in cost, and the flexible platinized counter electrode can be prepared at low temperature. The obtained flexible platinized counter electrode has the advantages of low platinum content, high catalytic activity, high repeatability, strong platinum particle adhesion strength, high stability and the like.

Description

technical field [0001] The invention relates to a flexible platinum-carrying counter electrode, a preparation method and application thereof. Background technique [0002] Platinum-supported counter electrodes have been widely used in many fields such as dye-sensitized solar cells, fuel cells, and photocatalysis due to their excellent catalytic activity and electrical conductivity. There are many methods for preparing platinum-loaded electrodes. [0003] High-temperature pyrolysis is one of the most effective methods for preparing high-performance Pt-loaded counter electrodes. However, this method requires high-temperature sintering, so it cannot be used in the preparation of platinum-supported counter electrodes based on conductive polymers. [0004] Magnetron sputtering and vacuum evaporation can prepare high-performance platinum-loaded counter electrodes at low temperature, which can be applied to the preparation of flexible counter electrodes, but this preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
Inventor 傅年庆林原周晓文
Owner INST OF CHEM CHINESE ACAD OF SCI
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