Quasi solid state electrolyte and its preparing process and use

An electrolyte, quasi-solid-state technology, applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve the problems of liquid electrolytes such as volatilization and leakage, interface electron-hole recombination, and electrolytes are not easy to fill, etc., to improve long-term stability Sexuality and photoelectric conversion efficiency, promotion of gelation, and the effect of improving photoelectric conversion efficiency

Inactive Publication Date: 2007-08-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To obtain stable dye-sensitized solar cells, all-solid electrolytes or ionic liquid iodine-based electrolytes can be used at present, but all-solid electrolytes have serious interfacial electron-hole recombination, short electron diffusion length, and the electrolyte is not easy to fill TiO 2 In contrast, ionic liquid iodine-based electrolytes have the advantages of thermal stability, high ionic conductivity, wide electrochemical window, and non-toxicity. Ionic conductivity, thus becoming an important development direction of dye-sensitized solar cells
The only disadvantage of existing ionic liquid iodine-based electrolytes is the high viscosity (compared to liquid electrolytes), which limits the I - / I 3 - Therefore, the conversion efficiency of the current ionic liquid iodine-based electrolyte battery is slightly lower than that of the liquid electrolyte battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, the preparation of quasi-solid electrolyte

[0030] Prepare the quasi-solid-state electrolyte by the direct mixing method of the present invention: add 0.0015mol elemental iodine, 0.025mol 1-propyl-3-methylimidazole iodine, 0.005mol N-methylbenzimidazole, and 0.001mol guanidine isothiocyanate Into 10mL of 1-ethyl-3-methylimidazolium tetracyanoborate ionic liquid, after mixing evenly, add 0.00015mol of layered α-titanium phosphate to obtain a viscous quasi-solid electrolyte.

[0031] After testing, the conductivity of the quasi-solid electrolyte is 16.1mS cm -1 , I 3 - The apparent diffusion coefficient is 3.9×10 -5 .

[0032] The above-mentioned quasi-solid electrolyte is assembled into a dye-sensitized solar cell, the photoanode of the solar cell is FTO conductive glass coated with titanium dioxide nanocrystals, the dye is N3, N719 or K77, the electrolyte is the above-mentioned quasi-solid electrolyte, and the counter electrode is platinum-plated FTO...

Embodiment 2

[0033] Embodiment 2, the preparation of quasi-solid electrolyte

[0034] The quasi-solid-state electrolyte is prepared by the organic solvent mixed volatilization method of the present invention, comprising the following steps:

[0035] 1) 0.001mol elemental iodine, 0.0005mol lithium iodide, 0.006mol 1-ethyl-3-methylimidazolium iodine, 0.005mol tetra-tert-butylpyridine, 0.001mol guanidine isothiocyanate and 0.001mol layered Mix tin phosphate with 100mL acetonitrile;

[0036] 2) Mix the mixed solution obtained in step 1) with 10 mL of 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid (the volume ratio of the organic mixed solution to the ionic liquid is 10:1);

[0037] 3) Ultrasonic heat treatment is performed on the mixed solution obtained in step 2) until the acetonitrile is completely volatilized to obtain a viscous quasi-solid electrolyte.

[0038] After testing, the conductivity of the quasi-solid electrolyte is 14.5mS cm -1 , I 3 - The apparent diffusion coe...

Embodiment 3

[0040] Embodiment 3, the preparation of quasi-solid electrolyte

[0041] The quasi-solid-state electrolyte is prepared by the organic solvent mixed volatilization method of the present invention, comprising the following steps:

[0042] 1) Mix 0.001mol elemental iodine, 0.01mol sodium iodide, 0.01mol tetra-tert-butylpyridine, 0.005mol guanidine isothiocyanate and 5×10 -5 mol layered montmorillonite mixed with 300mL acetone;

[0043] 2) Mix the mixed solution obtained in step 1) with 10 mL of 1-ethyl-3-methylimidazolium trifluoromethanesulfonimide ionic liquid (the volume ratio of the mixed solution to the ionic liquid is 30:1);

[0044] 3) Ultrasonic heat treatment is performed on the mixed liquid obtained in step 2) until the acetone is completely volatilized to obtain a viscous quasi-solid electrolyte.

[0045] After testing, the conductivity of the quasi-solid electrolyte is 12.3mS cm -1 , I 3 - The apparent diffusion coefficient is 2.1×10 -5 .

[0046] The above-men...

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Abstract

The invention discloses one quartz solid electrolyte and its process method, wherein, the electrolyte comprises ion liquid, inorganic layer materials, single iodide, light anode match agent and isothiocyanic acid through direct mixture method or organic solvent agent mixture evaporation, wherein, the ion liquid is of solvent agent and other element mole concentration as inorganic layer materials for 0.001-10mol / L; single mass iodide for 0.01-1mol / L; iodide; light anode match agent for 0.01-1mol / L; isothiocyanic acid for 0.01-1mol / L.

Description

technical field [0001] The invention relates to an electrolyte and its preparation method and application, in particular to a quasi-solid electrolyte, its preparation method and its application in dye-sensitized solar cells. Background technique [0002] With the sustained and rapid development of my country's economy, energy-resource-environmental issues have become increasingly prominent. Therefore, it is very urgent to develop green and environmentally friendly renewable energy. As an inexhaustible and inexhaustible green energy, solar energy has become a form of renewable energy that is vigorously developed and utilized by countries all over the world. At present, solar photovoltaic utilization is mainly based on silicon-based solar cells. Although its conversion efficiency is high, the process is complex, expensive, and has strict requirements on material purity. Therefore, it is of great significance to develop new solar cells with low price and high photoelectric conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M14/00H01G9/20H01L51/46H01L51/48H01L51/42
CPCY02E10/542Y02E10/549
Inventor 程萍邓长生戴遐明李冰
Owner TSINGHUA UNIV
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