CN102568835A - High-stability liquid electrolyte for dye sensitized solar cell and preparation method thereof - Google Patents

High-stability liquid electrolyte for dye sensitized solar cell and preparation method thereof Download PDF

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CN102568835A
CN102568835A CN201110448761XA CN201110448761A CN102568835A CN 102568835 A CN102568835 A CN 102568835A CN 201110448761X A CN201110448761X A CN 201110448761XA CN 201110448761 A CN201110448761 A CN 201110448761A CN 102568835 A CN102568835 A CN 102568835A
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liquid electrolyte
preparation
electrolyte
concentration
stability
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CN102568835B (en
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胡志强
黄德峰
刘显卿
杨冬雪
殷克剑
秦颖
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Dalian Polytechnic University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/542—Dye sensitized solar cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention discloses high-stability liquid electrolyte for a dye sensitized solar cell and a preparation method of the high-stability liquid electrolyte. The preparation method comprises steps of compounding sulfolane and 3-methoxypropionitrile in volume ratio of 1:6-6:0 to be used as solvent, adding LiI with concentration being 0.3-0.8mol/L, I2 with concentration being 0.03-0.07mol/L and 4-tert-Butylpyridine with concentration being 0.3-0.8mol/L, stirring the mixture by a magnetic stirrer for 2h, treating the mixture in an ultrasound oscillator for 2h, and then laying aside the mixture for 3h to obtain the electrolyte solution. The high-stability liquid electrolyte for the dye sensitized solar cell prepared by the method has higher binding force on organic solvents and additives, and the problems of volatilization, leakage and the like of the electrolyte can be helped to be prevented. The high-stability liquid electrolyte is simple in preparation process and high in stability and has potential industrial practical applicability.

Description

High stability DSSC liquid electrolyte and preparation method thereof
Technical field
The invention belongs to technical field of solar batteries, relate to DSSC liquid electrolyte and preparation method thereof.
Background technology
DSSC has vast potential for future development as a kind of model electrochemical battery that rose in 20th century, and it mainly contains three parts and forms: promptly work electrode, to electrode and electrolyte.Electrolyte is one of part important in the DSSC, mainly contains liquid electrolyte, quasi-solid electrolyte and solid electrolyte.At present; Liquid electrolyte adopts compositions such as I-/I3-oxidation-reduction pair, additive, organic solvent usually; But there are some row problems such as the volatilization, leakage, encapsulation difficulty, stability test difference of solvent in this kind liquid electrolyte, solves the great difficult problem that this type of problem becomes liquid electrolyte research.Research and development of new organic solvent, preparation high stability electrolyte is the effective way that solves this type of problem.
Sulfolane is a kind of high polar solvent; Have excellent in chemical and thermal stability, higher dielectric constant, at normal temperatures non-volatile, can dissolved oxygen reduction electricity to organic solvents such as, additives; With sulfolane as organic solvent; Through with the compound preparation of other organic solvents, can solve the problem such as volatilization, leakage, encapsulation of electrolyte solvent preferably.Guarantee effective working concentration of each component in the electrolyte, reach the purpose that improves stability test.
Summary of the invention
Defective to the existence of DSSC liquid electrolyte; The objective of the invention is to solve the problems such as volatilization, leakage and poor stability of electrolyte solvent; A kind of high stability DSSC liquid electrolyte is provided; On basis, introduce sulfolane and prepare liquid electrolyte as organic solvent based on conventional liquid electrolyte raw material.
The present invention is achieved through following technical scheme:
A kind of high stability DSSC liquid electrolyte is characterized in that by LiI, I 2, 4-tert .-butylpyridine, 3-methoxypropionitrile and sulfolane form;
Wherein:
The volume ratio of sulfolane and 3-methoxypropionitrile is 1: 6～6: 0;
The concentration of LiI is 0.3～0.8mol/L;
I 2Concentration be 0.03～0.07mol/L;
The concentration of 4-tert .-butylpyridine is 0.3～0.8mol/L;
A kind of preparation method of liquid electrolyte as stated is characterized in that step is following:
A, sulfolane is mixed under 30 ℃ of conditions with the 3-methoxypropionitrile in proportion,, puts into ultrasonator again and handle 2h through magnetic stirrer 2h, place then behind the ageing 3h compounded organic solvent;
B, in above-mentioned double solvents, add the LiI of 0.3～0.8mol/L, the I of 0.03～0.07mol/L 24-tert .-butylpyridine with 0.3～0.8mol/L;
C, through magnetic stirrer 2h, put into ultrasonator again and handle 2h, obtain high stability DSSC liquid electrolyte after placing ageing 3h then.
Beneficial effect of the present invention is: LiI, I 2Simple substance is I -/ I 3 -The oxidation-reduction pair donor is an additive with the 4-tert .-butylpyridine, and organic solvent is sulfolane and 3-methoxypropionitrile double solvents, guarantees effective working concentration of each component in the electrolyte through the proportioning of controlling sulfolane and additive, oxidation-reduction pair.Sulfolane belongs to higher boiling point (285 ℃) organic solvent, and is non-volatile at normal temperatures and pressures, guaranteed the stability of electrolyte organic solvent; Sulfolane and 4-tert .-butylpyridine, 3-methoxypropionitrile form the effect of hydrogen bond and Van der Waals force in electrolyte, increase the binding force to 4-tert .-butylpyridine, 3-methoxypropionitrile molecule, help reducing its volatilization.Thereby guaranteed the valid density of oxidation-reduction pair and additive, can improve the stability of battery preferably.
The high stability DSSC liquid electrolyte that the present invention makes has higher binding force to organic solvent, additive, helps to prevent problems such as electrolytical volatilization, leakage.Its preparation technology is simple, and stability is high, has potential industrialization practicality.
Description of drawings
3 in the total accompanying drawing of the present invention, wherein:
Fig. 1 is the photoelectric properties curve of embodiment 1 battery sample;
Fig. 2 is the photoelectric properties curve of embodiment 2 battery samples;
Fig. 3 is the photoelectric properties curve of embodiment 3 battery samples.
Embodiment
Embodiment 1
Under 30 ℃ of conditions, the sulfolane and the 3-methoxypropionitrile solvent of measuring volume ratio and be 2: 3 are processed double solvents, add the LiI of 0.5mol/L, the I of 0.05mol/L 2With the 4-tert .-butylpyridine of 0.5mol/L, through magnetic stirrer 2h, put into ultrasonator again and handle 2h, obtain electrolyte solution after placing ageing 3h then.With what the surface was coated with Pt electrode is overlayed work electrode (with quantitative TiO 2Powder, glacial acetic acid, triton x-100 etc. are processed TiO 2Slurry is coated with in the surface on the FTO electro-conductive glass of dense film and prints TiO 2Coating light anode-effective area is 0.25cm 2, through obtaining work electrode after heat treatment, the dye sensitization) on, two electrodes that stagger are reserved the wide current-carrying part of about 5mm and are used as battery testing.With clip two electrodes are fixed, utilized siphon principle between two electrode slits, to inject above-mentioned electrolyte, obtain simple and easy assembled battery.Adopt SolarSimulator SS50 (AM1.5,100mW/cm 2), Keithley 2400 test battery photoelectric properties.Fig. 1 is the photoelectric properties curve of battery sample, and table 1 is the photoelectric properties parameter of this battery, and table 2 is the photoelectric conversion efficiency of assembled battery running parameter in time.
Table 1
Figure BDA0000125849500000031
Embodiment 2
Experimental technique and embodiment 1 are same, and sulfolane and 3-methoxypropionitrile volume ratio are 3: 2 in the double solvents, the LiI of 0.5mol/L, the I of 0.05mol/L 2With the 4-tert .-butylpyridine of 0.5mol/L, the preparation bath sample.Fig. 2 is the photoelectric properties curve of battery sample, and table 3 is the photoelectric properties parameter of this battery, and table 4 is the photoelectric conversion efficiency running parameter in time of this assembled battery.
Table 3
Figure BDA0000125849500000032
Embodiment 3
Experimental technique and embodiment 1 are same, and sulfolane and 3-methoxypropionitrile volume ratio are 4: 1 in the double solvents, the LiI of 0.5mol/L, the I of 0.05mol/L 2With the 4-tert .-butylpyridine of 0.5mol/L, the preparation bath sample.Fig. 3 is the photoelectric properties curve of battery sample, and table 5 is the photoelectric properties parameter of this battery, and table 6 is the photoelectric conversion efficiency running parameter in time of this assembled battery.
Table 5
Figure BDA0000125849500000041
More than be embodiments of the invention, DSSC uses the preparation of those skilled in the art's known method.The FTO electro-conductive glass that is coated with Pt with the surface is to electrode, through the TiO of dye sensitization 2Porous electrode is a work electrode, is assembled into battery with the electrolyte of the present invention preparation and tests.

Claims (2)

1. a high stability DSSC liquid electrolyte is characterized in that by LiI, I 2, 4-tert .-butylpyridine, 3-methoxypropionitrile and sulfolane form;
Wherein:
The volume ratio of sulfolane and 3-methoxypropionitrile is 1: 6～6: 0;
The concentration of LiI is 0.3～0.8mol/L;
I 2Concentration be 0.03～0.07mol/L;
The concentration of 4-tert .-butylpyridine is 0.3～0.8mol/L.
2. preparation method of liquid electrolyte according to claim 1 is characterized in that step is following:
A, sulfolane is mixed under 30 ℃ of conditions with the 3-methoxypropionitrile in proportion,, put into ultrasonator again and handle 2h, obtain compounded organic solvent after placing ageing 3h then through magnetic stirrer 2h;
B, in the double solvents that step a makes, add LiI, I in proportion 2With the 4-tert .-butylpyridine;
C, through magnetic stirrer 2h, put into ultrasonator again and handle 2h, obtain high stability DSSC liquid electrolyte after placing ageing 3h then.
CN201110448761.XA 2011-12-28 2011-12-28 High-stability liquid electrolyte for dye sensitized solar cell and preparation method thereof Expired - Fee Related CN102568835B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111508710A (en) * 2020-05-04 2020-08-07 南通瑞泰电子有限公司 Electrolyte for wide-temperature aluminum electrolytic capacitor and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1433085A (en) * 2002-01-18 2003-07-30 夏普公司 Photocell including porous semiconductor layer, its production process and solar cell
CN101354967A (en) * 2008-09-05 2009-01-28 浙江科技学院 Quasi solid electrolyte for dye sensitization solar battery and preparation method thereof
CN101593625A (en) * 2009-06-19 2009-12-02 中南大学 A kind of low-temperature electrolyte for supercapacitor and preparation method thereof
CN101740228A (en) * 2009-12-23 2010-06-16 南京航空航天大学 Method for preparing counter electrode based on electrochemical synthesized polyaniline on surface of stainless steel
CN102194574A (en) * 2010-03-17 2011-09-21 索尼公司 Photoelectric conversion device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1433085A (en) * 2002-01-18 2003-07-30 夏普公司 Photocell including porous semiconductor layer, its production process and solar cell
CN101354967A (en) * 2008-09-05 2009-01-28 浙江科技学院 Quasi solid electrolyte for dye sensitization solar battery and preparation method thereof
CN101593625A (en) * 2009-06-19 2009-12-02 中南大学 A kind of low-temperature electrolyte for supercapacitor and preparation method thereof
CN101740228A (en) * 2009-12-23 2010-06-16 南京航空航天大学 Method for preparing counter electrode based on electrochemical synthesized polyaniline on surface of stainless steel
CN102194574A (en) * 2010-03-17 2011-09-21 索尼公司 Photoelectric conversion device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111508710A (en) * 2020-05-04 2020-08-07 南通瑞泰电子有限公司 Electrolyte for wide-temperature aluminum electrolytic capacitor and preparation method thereof

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Inventor after: Hu Zhiqiang

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