Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A redox couple and its application

A technology of electrical pairing and chemistry, applied in the field of dye-sensitized solar cells, can solve the problems of low photoelectric conversion efficiency and the inability to meet the industrialization requirements of solar cells, and achieve the effect of high redox potential

Inactive Publication Date: 2016-06-15
SUZHOU UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photoelectric conversion efficiency of dye-sensitized solar cells based on TEMPO redox pairs in the prior art is low, which cannot meet the industrial requirements of solar cells.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-17

[0024] Various iodine-containing ionic liquids and TEMPO derivatives were formulated into redox couples in different molar ratios, and the redox couples were electrochemically tested: the redox couples were dissolved in acetonitrile to form iodine-containing ionic liquids with a concentration of 5mmol / L (mmol per liter) solution, and add LiClO to the solution 4 (as a supporting electrolyte) so that its concentration was 0.1mol / L, and a cyclic voltammetry test was performed under three-electrode conditions, and the specific results are listed in Table 1.

Embodiment 18

[0031] Preparation of liquid electrolytes based on redox pairs based on TEMPO derivatives:

[0032] 0.13g , 0.008g , 0.006g of the oxidant nitrous tetrafluoroborate additive (NOBF4) and 0.05g of the additive 4-tert-butylpyridine (TBP) were dissolved in 5 ml of acetonitrile (ACN), and stirred evenly to obtain a liquid electrolyte.

[0033] Assemble a dye-sensitized solar cell and measure its performance:

[0034] Clean the FTO conductive glass with ultrasonic waves and immerse it in 40mMTiCl at 70°C 4 Keep it in the aqueous solution for 30min, so as to form a layer of dense TiO on the surface of FTO conductive glass 2 Then take out the FTO conductive glass, rinse it with ethanol and dry it naturally; apply the P25 slurry and P400 slurry on the TiO 2 On the film, TiO with a thickness of 8 μm and 3 μm were formed 2 Coating, heating to 500°C for calcination, when the FTO conductive glass is naturally cooled to 80°C, immerse in the dye Z907 solution for 12 hours, take it out...

Embodiment 19

[0037] Dye-sensitized solar cells were assembled using the same method as in Example 1, and their photoelectric conversion efficiency was tested. The difference lies in the redox pair components and contents in the liquid electrolyte. In this example, 0.13g , 0.025g , 0.006g oxidant nitrous tetrafluoroborate additive (NOBF 4 ) and 0.05g of the additive 4-tert-butylpyridine (TBP) were dissolved in 5ml of acetonitrile (ACN), and the liquid electrolyte was obtained after stirring evenly.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a kind of redox couple, and it is made up of iodine-containing ionic liquid and TEMPO derivative, and described TEMPO derivative is the combination of one or more selected from the compound that satisfies the following general chemical formula: , , , and In the above general chemical formula, a, b, c and d are independently integers from 1 to 4, and Z is selected from Br, Cl, SCN, N(CN) 2 、C(CN) 3 、B(CN) 4 , BF 4 、PF 6 、CF 3 SO 3 、C 2 f 5 SO 3 , [N(SO 2 CF 3 ) 2 ], ClO 4 and CF 3 One of the COOs. The redox pair of the present invention, by adding TEMPO derivatives to the iodine-containing ionic liquid, makes the redox pair have a higher redox potential, and it has no corrosion to the metal substrate and hardly absorbs visible light, and is suitable for the preparation of dye-sensitive Electrolyte for solar cells.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cells, and in particular relates to a redox couple and an application thereof. Background technique [0002] Redox couple (referred to as redox couple) is the core part of solar cells, especially dye-sensitized solar cells. It is mainly used for electron transmission in dye-sensitized solar cells. Its performance directly affects the efficiency and application. [0003] At present, the most widely used and researched dye-sensitized solar cells are I - / I 3 - redox couple. I - / I 3 - Redox pairs have the advantages of fast electron exchange and slow recombination with photogenerated electrons, but they also have disadvantages such as corrosion of the metal substrate of the current collector, volatilization of iodine, absorption of visible light, and low redox potential, which affects Large-area and commercial applications of dye-sensitized solar cells. Therefore, the development of redo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/028
Inventor 严锋张伟李世超时成贞张也
Owner SUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com