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Electrolyte, preparation method and application based on organic sulfur redox couple

An organic sulfur and electrolyte technology, applied in the field of solar cells, can solve problems such as unfavorable electrolyte ion transport, increase in electrolyte viscosity, decrease in diffusion speed, etc., and achieve the effects of simple process, improved conversion efficiency, and high conversion efficiency.

Active Publication Date: 2013-07-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, such complexes usually have large molecules, which lead to an increase in the viscosity of the electrolyte and a decrease in the diffusion rate, which is not conducive to ion transport in the electrolyte.

Method used

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  • Electrolyte, preparation method and application based on organic sulfur redox couple

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Embodiment 1

[0045] The electrolyte of this embodiment is prepared according to the following method: an organic sulfur salt (such as 2-ethylmercapto tetrazolium lithium salt, the dosage can be 6.8mg, the concentration can be 0.05mmol) and its corresponding disulfide bis(1-ethyl base tetrazolium-5-) disulfide (for example, the amount can be 6.5mg, the concentration is 0.00625mmol), then add crown ether (for example, 12-crown-4), and acetonitrile (preferably 0.25mL) and ethylene carbonate (preferably 0.25mL), ultrasonically dissolves completely to obtain a liquid electrolyte.

[0046] In this embodiment, the organic sulfur salt is not limited thereto, for example, it may also be sodium or potassium salt of 2-ethylmercaptotetrazole.

[0047] The electrolyte was assembled into a liquid dye-sensitized nanocrystalline solar cell. At an intensity of 100mW·cm -2 The simulated solar photovoltaic performance test shows that the closed-circuit photocurrent density J obtained by the solar cell sc ...

Embodiment 2

[0049] The electrolyte of this example is prepared according to the following method: organic sulfur salt (such as 2-phenylmercaptotetrazolium sodium salt, the dosage can be 14.9 mg, the concentration can be 0.075 mmol), crown ether (such as 8.1 μL of 0.05 mmol of 15- crown-5) and the corresponding disulfide bis(1-phenyltetrazole-5-) disulfide (for example, the dosage can be 22mg, the concentration is 0.00625mmol), add a certain amount of acetonitrile (for example, 0.5mL), ultrasonic Dissolve completely to obtain liquid electrolyte.

[0050] The electrolyte was assembled into a liquid dye-sensitized nanocrystalline solar cell. At an intensity of 100mW·cm -2 The simulated solar photovoltaic performance test shows that the closed-circuit photocurrent density J obtained by the solar cell sc =9.26mA / cm 2 , open circuit voltage V oc =632mV, fill factor FF=0.71, photoelectric conversion efficiency η=4.16%.

[0051] In this embodiment, the crown ether can also be 18-crown-6 or o...

Embodiment 3

[0053] The electrolyte of this example is prepared according to the following method: organic sulfur salt (such as 2-p-methoxyphenylmercapto tetrazolium potassium salt, the dosage can be 49.2 mg, the concentration can be 0.2 mmol), crown ether (such as 32.4 μL 0. 2mm ol of 18-crown-6) and the corresponding disulfide bis(1-p-methoxyphenyltetrazolium-5-)disulfide (for example, the dosage can be 42mg and the concentration is 0.1mmol), and add a certain amount Ethylene carbonate (for example, 0.5mL) is completely dissolved by ultrasonication to obtain a liquid electrolyte.

[0054] The electrolyte was assembled into a liquid dye-sensitized nanocrystalline solar cell at an intensity of 100 mW cm -2 The simulated solar photovoltaic performance test shows that the closed-circuit photocurrent density J obtained by the solar cell sc =12.2mA / cm 2 , open circuit voltage V oc =629mV, fill factor FF=0.70, photoelectric conversion efficiency η=5.40%.

[0055] In this embodiment, the org...

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Abstract

The invention discloses an electrolyte based on organic sulfur redox couple. The electrolyte is characterized by comprising the organic sulfur redox couple and crown ether or cryptand. A reduction state component of the organic sulfur redox couple is organic sulfur salt, and an oxidation state component of the organic sulfur redox couple is organic disulphide corresponding to the organic sulfur salt. The invention further discloses a preparation method of the electrolyte, and application of the electrolyte in preparing of a solar cell or a fuel cell or a lithium ion cell or a super capacitor. A metal cation formed by the crown ether or the cryptand in a complexing mode is adopted by the electrolyte to serve as a positive ion of the reduction state component of the organic sulfur redox couple, and activity, stability and electrochemical reversibility of a redox reaction are good. Diffusion speed is high, ion transport in the electrolyte is utilized, and the method is simple in synthesis preparation process and low in cost, and has good application prospects in dye sensitization nano solar cells.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a solar cell electrolyte, its preparation method and its application. Background technique [0002] Dye-sensitized nanocrystalline solar cells can convert the light energy generated by the sun into electrical energy, and have become a powerful way for human beings to use sunlight to solve energy problems in recent years. Electrolyte is the key component of dye-sensitized nanocrystalline solar cells, in which the redox pair is responsible for the following functions: obtain electrons from the counter electrode, diffuse to the vicinity of the working electrode, inject electrons into the working electrode in the form of regenerated dye, and complete the transport of electrons . The working ability of the electrolyte mainly depends on the redox activity, stability, redox potential and electrochemical reversibility of the redox couple. Therefore, the nature of the re...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/035H01G11/62H01G11/84
CPCY02E10/542Y02E60/13Y02P70/50
Inventor 韩宏伟刘林峰李雄刘广辉汪恒荣耀光库治良徐觅
Owner HUAZHONG UNIV OF SCI & TECH
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