Quasi-solid electrolyte for solar cell based on double-imidazole type ionic crystal

A technology of solar cells and ionic crystals, applied in capacitor electrolyte/absorber, photovoltaic power generation, capacitor parts and other directions, can solve the problems affecting the photoelectric conversion efficiency of dye-sensitized solar cells, low conductivity of monoimidazole type ionic crystals, etc. Achieve the effect of improving photoelectric conversion efficiency, high stability, and avoiding leakage

Inactive Publication Date: 2013-11-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese invention patent with the publication number CN 102592832A discloses a solid electrolyte for solar cells, because the conductivity of the main component of the monoimidazole-type ionic crystal is relatively low, about 1×10 -6 S / cm seriously affects the photoelectric conversion efficiency of dye-sensitized solar cells prepared with this electrolyte, which only reaches 4.45%.

Method used

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  • Quasi-solid electrolyte for solar cell based on double-imidazole type ionic crystal
  • Quasi-solid electrolyte for solar cell based on double-imidazole type ionic crystal
  • Quasi-solid electrolyte for solar cell based on double-imidazole type ionic crystal

Examples

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Embodiment 1

[0021] This example provides a kind of preparation method of bis-imidazole type ion crystal, as figure 1 shown, including the following steps:

[0022] (1) Add 20mL acetone, 15mmol diiodobutane, 10mmol , 20mmol K 2 CO 3 , under the protection of inert gas at 60°C, reacted for 15 hours and then filtered to obtain the filtrate, which was obtained by rotary evaporation and petroleum ether recrystallization ;

[0023] (2) Add 20mL of acetonitrile, 10mmol of diiodobutane, 25mmol of imidazole, and 35mmol of KOH in sequence in another reaction vessel, react at room temperature for 10 hours and then filter to obtain the filtrate, which is obtained by rotary evaporation and deionized water recrystallization ;

[0024] (3) Add 10mmol Add dropwise to 30mmol in acetone (20mL) solution, condensed and refluxed at 30°C for 10 hours, removed the acetone by rotary evaporation, washed three times with ethyl acetate and diethyl ether, and dried to obtain ;

[0025] (4) Add 10mmol ...

Embodiment 2

[0027] This example provides a kind of preparation method of bis-imidazole type ion crystal, as figure 1 shown, including the following steps:

[0028] (1) Add 20mL acetone, 15mmol diiodobutane, 10mmol , 20mmol K 2 CO 3 , under the protection of inert gas at 80°C, reacted for 20 hours and then filtered to obtain the filtrate, which was obtained by rotary evaporation and petroleum ether recrystallization ;

[0029] (2) Add 20mL of acetonitrile, 10mmol of diiodobutane, 25mmol of imidazole, and 35mmol of KOH in sequence in another reaction vessel, react at room temperature for 15 hours, and then filter to obtain the filtrate, which is obtained by rotary evaporation and deionized water recrystallization ;

[0030] (3) Add 10mmol Add dropwise to 30mmol in acetone (20mL) solution, condensed and refluxed at 30°C for 10 hours, removed the acetone by rotary evaporation, washed three times with ethyl acetate and diethyl ether, and dried to obtain ;

[0031] (4) Add 10mmol...

Embodiment 3

[0033] This example provides a kind of preparation method of bis-imidazole type ion crystal, as figure 1 shown, including the following steps:

[0034] (1) Add 20mL acetone, 15mmol diiodobutane, 10mmol , 20mmol K 2 CO 3 , under the protection of inert gas at 80°C, reacted for 20 hours and then filtered to obtain the filtrate, which was obtained by rotary evaporation and petroleum ether recrystallization ;

[0035] (2) Add 20mL of acetonitrile, 10mmol of diiodobutane, 25mmol of imidazole, and 35mmol of KOH in sequence in another reaction vessel, react at room temperature for 15 hours, and then filter to obtain the filtrate, which is obtained by rotary evaporation and deionized water recrystallization ;

[0036] (3) Add 10mmol Add dropwise to 30mmol in acetone (20mL) solution, condensed and refluxed at 30°C for 10 hours, removed the acetone by rotary evaporation, washed three times with ethyl acetate and diethyl ether, and dried to obtain ;

[0037] (4) Add 10mmol...

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Abstract

The invention relates to a quasi-solid electrolyte for a solar cell based on double-imidazole type ionic crystal. The quasi-solid electrolyte comprises 25-50wt% of imidazole-type ionic liquid, 30-65wt% of double-imidazole ionic crystal, 5-10wt% of iodine elementary substance and 5-10wt% of additive. The general formula of the chemical construction of the double-imidazole ionic crystal is , wherein X is Br or I or C1 or BF4 or TFSI or PF6, a and b are independently integers from 2 to 6, and c is an integer from 0 to 5. On one hand, the components of the quasi-solid electrolyte do not contain organic solvent, the problem of organic solvent leakage is effectively avoided, and a dye-sensitized solar cell prepared by the quasi-solid electrolyte has high stability; on the other hand, the quasi-solid electrolyte contains the double-imidazole type ionic crystal, the conductivity of the quasi-solid electrolyte is improved, and accordingly the photoelectric converting efficiency of the dye-sensitized solar cell is improved.

Description

technical field [0001] The invention relates to a solar battery electrolyte, in particular to a quasi-solid electrolyte for solar batteries based on biimidazole-type ionic crystals. Background technique [0002] As the core component of solar cells, especially dye-sensitized solar cells, electrolyte mainly plays the role of transporting redox couples, and its performance directly affects the efficiency of solar cells. Common electrolytes for dye-sensitized solar cells are liquid, quasi-solid, and solid. Among them, liquid electrolytes mostly contain organic solvents such as acetonitrile and methoxypropionitrile, which have disadvantages such as flammability, leakage, volatilization, difficulty in packaging, high toxicity, and poor stability; solid electrolytes have low conductivity, resulting in dyes prepared with solid electrolytes. The photoelectric conversion efficiency of sensitized solar cells is low, and there is still a long way to go before commercialization; theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/022H01G9/20
CPCY02E10/542
Inventor 赵杰邹贵付丛姗曹梦瑜
Owner SUZHOU UNIV
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