Polyhedral oligomeric silsesquioxane (POSS)-based solid ionic liquid, and preparation method and application thereof

A kind of ionic liquid and solid-state technology, applied in the direction of silicon organic compound, hybrid capacitor electrolyte, etc., can solve the problems of poor contact of TiO2, unsatisfactory application, low conductivity, etc., and achieve good thermal stability and reliability Modification, good development and application prospects, sufficient supply effect

Inactive Publication Date: 2014-02-19
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These solid-state electrolytes solve the problem of poor stability of general liquid electrolytes and battery life, but due to some inherent disadvantages, such as low conductivity at room temperature, and TiO 2 The contact is not good, etc., and its application is far from satisfactory

Method used

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  • Polyhedral oligomeric silsesquioxane (POSS)-based solid ionic liquid, and preparation method and application thereof
  • Polyhedral oligomeric silsesquioxane (POSS)-based solid ionic liquid, and preparation method and application thereof
  • Polyhedral oligomeric silsesquioxane (POSS)-based solid ionic liquid, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: intermediate 4 preparation of

[0034] 11.91g (0.06mol) 3 (References for synthetic methods R. Wakabayashi, Y. Sugiura, T. Shibue and K. Kuroda. Angew. Chem. Int. Ed. , 2011, 50 , 10708–10711) was added to 250ml of methanol, concentrated hydrochloric acid was added to adjust the solution to PH=3, hydrolyzed at 60°C for 3 days, and 1.56g of intermediate 4 was obtained by filtration, with a yield of 20%.

Embodiment 2

[0035] Embodiment 2: ionic liquid 6 preparation of

[0036] 1.82g (13 mmol) 3-acetoxymethylimidazole (intermediate 2） and 2.21g (1.25 mmol) of intermediate 5 were dissolved in 20ml of tetrahydrofuran and stirred at room temperature for 48 hours. After the reaction was completed, the clear solution in the upper layer was directly poured out, and the viscous solid at the bottom was drained with an oil pump. The solid was washed with tetrahydrofuran, ultrasonicated, and the clear solution in the upper layer was poured off, and the viscous solid at the bottom was drained again with an oil pump. Repeat the above steps more than 3 times to get 2.89g ionic liquid 6 , 80% yield.

Embodiment 3

[0037] Embodiment 3: ionic liquid 7 preparation of

[0038]

[0039] 2.13g (13mmol) of 3-ethylpropionylimidazole and 2.21g (1.25mmol) of intermediate 5 were dissolved in 20ml of tetrahydrofuran, and stirred at room temperature for 48 hours. After the reaction was completed, the clear solution in the upper layer was directly poured out, and the viscous solid at the bottom was drained with an oil pump. The solid was washed with tetrahydrofuran, ultrasonicated, and the clear solution in the upper layer was poured off, and the viscous solid at the bottom was drained again with an oil pump. Repeat the above steps more than 3 times to get 2.92g ionic liquid 7 , yield 76%.

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Abstract

The invention belongs to the technical field of organic photoelectric materials, and in particular relates to polyhedral oligomeric silsesquioxane (POSS)-based solid ionic liquid, and a preparation method and application thereof. The solid ionic liquid provided by the invention contains the POSS and ester group substituted imidazole iodate and is an organic/inorganic hybrid material taking the POSS as a core, and the conductivity of the solid ionic liquid can be adjusted through different groups grafted on the POSS. The ionic liquid can serve as solid electrolyte to be applied to a full-solid-state dye-sensitized solar battery, and energy conversion efficiency of 7.1% and high long-term stability can be achieved. Compared with the solid ionic liquid not containing the POSS, the POSS-based solid ionic liquid has the advantages that the solid electrolyte provided by the invention is not crystallized, has high wettability on the surface of titanium dioxide due to a large amount of Si-O bonds, and is favorable for filling of the solid electrolyte in titanium dioxide nanopores and regeneration of dye.

Description

technical field [0001] The invention belongs to the technical field of organic photoelectric materials, and in particular relates to a POSS-based solid-state ionic liquid and a preparation method thereof, as well as the application of the solid-state electrolyte in dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cell (DSSC) is a new type of solar cell developed based on the principle of plant chlorophyll photosynthesis. It was first proposed by Professor M. Grötzel of Switzerland in 1991, so it is also called Grötzel Battery. This battery has a simple structure and is mainly composed of a working electrode, an electrolyte, and a counter electrode. The working electrode is prepared by sintering a layer of nanoporous titanium dioxide film on a conductive glass substrate, and adsorbing a layer of photosensitive dye on it. The electrolyte can be liquid, quasi-solid and solid, the most commonly used is I 3 - / I - redox couple. The counter elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/21H01G11/62
Inventor 王忠胜张伟
Owner FUDAN UNIV
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