A kind of metal gel electrolyte and preparation method thereof

A metal gel and electrolyte technology, used in capacitor electrolytes/absorbers, electrolytic capacitors, circuits, etc., can solve the problems of poor ionic conductivity, difficult battery packaging, volatile electrolyte leakage, etc., and achieve high-efficiency photoelectric performance, material Rich, easy-to-prepare effects

Active Publication Date: 2020-11-17
HUBEI UNIV
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Problems solved by technology

[0004] However, with the birth of the liquid electrolyte DSSC with a photoelectric efficiency exceeding 14%, although the photoelectric efficiency of the liquid electrolyte DSSC is high, there are problems such as the volatile leakage of the electrolyte solvent and the difficulty of battery packaging. Solid electrolytes and quasi-solid electrolytes can effectively improve Due to the above problems, the solid electrolyte cannot effectively wet the TiO due to its poor ion conductivity. 2 Porous thin films lead to low photoelectric conversion efficiency of the assembled solid-state DSSC, and quasi-solid-state electrolytes have attracted extensive attention from researchers because of their good interfacial wettability, which can improve the long-term stability of DSSC and ensure the photoelectric performance of DSSC.

Method used

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  • A kind of metal gel electrolyte and preparation method thereof

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Embodiment 1

[0030] Preparation of the metal gel electrolyte: Weigh 18 mg of tannic acid, 20 mg of bis(acetylacetonate) diisopropyl titanate and 0.45 ml of dimethylformamide in a sample bottle, disperse them by ultrasonication for 20 min, and then statically Let it stand for 1 hour to form a metal gel, and then add 0.8ml of liquid electrolyte to the metal gel. After 1 day of adsorption, pour out the unabsorbed liquid electrolyte, and the metal gel electrolyte is in the sample bottle. The liquid electrolyte includes: 1mol / L 1,3-dimethyl-3-imidazolium iodine (DMII), 0.1mol / L lithium iodide, 0.13mol / L guanidine thiocyanate, 0.11mol / L iodine, 0.7mol / L4-tert-butylpyridine, the solvent is a mixed solution of acetonitrile and valeronitrile with a volume ratio of 85:15.

Embodiment 2

[0032] Fabrication of quasi-solid-state dye-sensitized solar cells based on metal gel electrolytes:

[0033] TiO2 was screen-printed 2 Nanoparticles are printed on the cleaned FTO conductive glass, and its thickness is controlled to be about 11 μm. It is heat treated in a programmed temperature muffle furnace at 510 ° C for 30 minutes. After cooling to room temperature, it is soaked in 30 mMTiCl at 70 ° C. 4 20min in aqueous solution, then sintered at 510°C for 30min at high temperature, and when cooled to 120°C, soak it in N719 dye for 16 hours, then take it out to get a photoanode that adsorbs N719 dye. Coat another piece of cleaned FTO conductive glass with isopropanol solution containing chloroplatinic acid, calcinate at 410°C for 30min, and cool to room temperature to obtain a Pt-containing counter electrode. Finally, the metal gel electrolyte is placed between the photoanode and the counter electrode by a sandwich method to assemble a battery. Such as figure 1 Shown a...

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Abstract

The invention discloses a metal gel electrolyte and a preparation method thereof. According to the metal gel electrolyte, a gel framework is formed by using metal positive ions and organic ligands; and then liquid electrolyte is absorbed to form a quasi-solid electrolyte. The metal gel electrolyte has the characteristics of low cost, simple preparation and the like and can be applied to fields ofa dye-sensitized solar cell and other batteries.

Description

technical field [0001] The invention belongs to the cross fields of chemistry, chemical industry, material and physical technology, and relates to a metal gel electrolyte, a preparation method and its application in dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cells have attracted widespread attention and developed rapidly due to their low cost, simple preparation process, and high conversion efficiency. [0003] The classic structure of DSSC is a "sandwich" sandwich structure, which is mainly composed of a conductive substrate, a semiconductor nanoporous film (mostly TiO 2 , ZnO, etc.), dye sensitizers (N719, C101, etc.), containing redox couples (I - / I 3 - , or Br - / Br 3 - , SeCN - / (SeCN) 2 , SCN - / (SCN) 2 etc.), and the counter electrode (such as conductive glass coated with Pt) consists of several main parts, wherein the electrolyte, as one of its important components, has an important impact on the efficiency and stability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/028
CPCH01G9/2009Y02E10/542
Inventor 王浩桃李张威张军
Owner HUBEI UNIV
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