Method for preparing Nano platinum carried catalysis electrode in Nano crystal sensitized solar battery

A technology of solar cells and nano-platinum, applied in battery electrodes, capacitor electrodes, photosensitive equipment, etc., can solve the problems of high platinum loading, unfavorable battery practicality, and restrictions on the amplification and preparation of platinum-loading electrodes, and achieve the effect of reducing production costs

Inactive Publication Date: 2008-01-30
INST OF CHEM CHINESE ACAD OF SCI
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Problems solved by technology

However, the amount of platinum loaded on electrodes prepared by electrodeposition and vacuum sputtering is high, which is not compatible with the low price of nanocrystalline sensitized solar cells; although the thermal decomposition method reduces the amount of platinum loaded, its catalytic activity is also better than that of The former two, but due to the application of spin-coating technology in the preparation process, the scale-up preparation of platinum-loaded electrodes is limited, which is not conducive to the practical application of batteries

Method used

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  • Method for preparing Nano platinum carried catalysis electrode in Nano crystal sensitized solar battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 4ml of sodium acrylate aqueous solution with a concentration of 1.0mol / L to 250ml with a concentration of 8.23×10 -4 K in mol / L 2 PtCl 6 50ml of ethanol was added to 40ml of the above solution. After bubbling nitrogen for 15 min, heat in an autoclave at 100 °C for 12 h to make PtCl 6 2- Reduction, to obtain dark brown acrylate-protected nano-platinum colloid solution.

[0027] Preparation is the dodecylmercaptan of solvent with toluene: stearic acid=5: 1 blend solution, wherein the concentration of stearic acid is 5.0 * 10 -3 mol / L. On the L-B film instrument (JC-1 type), the monomolecular film of the blend solution is transferred to the FTO conductive glass (SnO doped with F) with a surface pressure of 30mN / m and a lifting speed of 6mm / min. 2 , Sheet resistance is 20 ~ 30Ω / □) on the surface. The conductive substrate after hanging the film was immersed in the nano-platinum hydrosol for self-assembly, and the self-assembly time was 4 days. After the electrode...

Embodiment 2

[0036] By replacing the alkyl mercaptan in Example 1 with hexadecyl mercaptan and the ratio of stearic acid to 7:1, a nanometer-loaded platinum catalytic electrode with similar performance can be prepared.

Embodiment 3

[0038] The preparation of nano-platinum colloid is the same as in Example 1.

[0039] Prepare 50ml, the xylene solution of 10% (volume ratio) silane coupling agent, conduction glass is immersed in the above-mentioned solution, under N 2 Under the protection of , reflux at 100-150□ for 12 hours. The electrodes after silanization modification were in N 2 Washed with xylene and methanol in turn under the protection of the protection, and then immersed in the prepared nano-platinum colloid solution for self-assembly, the self-assembly time is 1 to 4 days. After the electrode was taken out, it was rinsed with twice distilled water to remove the physically adsorbed nano-platinum particles on the surface of the electrode, dried in air at room temperature, and then placed in a muffle furnace for sintering at 380°C for 15 minutes. The charge transfer resistance R of the prepared platinum-loaded catalytic electrode ct 0.6Ω.cm 2 (using the same test conditions as in Example 1), the c...

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Abstract

Using self-assembly technique loads Nano granules of platinum in hydrosol of compositive Nano platinum to surface of conducting substrate of containing mercaptan functional group after modification of L-B membrane or silanization so as to realize even, tight and discontinuous distribution of Nano granules of platinum on surface of conducting substrate. Using high sintering or vacuum treatment in low temperature forms Nano platinum carried catalysis electrode in high chemical activity. Electrode produced in the invention possesses very low platinum load so as to lower cost for preparing solar battery. The invention is applicable to preparation of flexible electrode, especially suitable to electrode pair in Nano crystal sensitized solar battery.

Description

technical field [0001] The invention belongs to the technical field of manufacturing a catalytic counter electrode in a nanocrystalline sensitized solar cell, and in particular relates to a preparation method of a nanometer-loaded platinum catalytic electrode. Background technique [0002] In nanocrystalline sensitized solar cells, the reaction occurring on the counter electrode is I 3 - +2e(Pt)→3I - . I 3- Diffusion to the counter electrode through the electrolyte solution, the electrons entered by the counter electrode are reduced to I - , while I - Diffusion from the counter electrode into the electrolyte solution, the TiO 2 Oxidized molecules of the dye are reduced on the working electrode. It can be seen that the redox reaction of iodine plays the role of restoring the dye, relaying the charge, and making the battery work stably and continuously for a long time, but I 3 - The reduction reaction speed on most electrodes (including bright platinum electrodes) is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L31/0224H01G9/04H01G9/20H01M4/00H01M14/00
CPCY02P70/50
Inventor 林原陈今茂周晓文李学萍肖绪瑞林瑞峰
Owner INST OF CHEM CHINESE ACAD OF SCI
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