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Ionic liquid electrolyte

An ionic liquid and electrolyte technology, applied in electrolytic capacitors, circuits, capacitors, etc., can solve the problems of low efficiency and instability of ion transport batteries, and achieve the effect of improving overall stability, solving volatility and non-volatile

Inactive Publication Date: 2012-08-29
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yet the ionic liquid that is used in the dye-sensitized solar cell mostly is the molten salt of iodine as anion, and this type of ionic liquid causes battery efficiency generally on the low side (Kubo, W., T.Kitamura , et al. (2002). "Quasi-solid-state dye-sensitized solar cells using room temperature molten salts and a low molecular weight gelator." Chemical Communications (4): 374-375)
Peng Wang etc. reported that a low viscosity ion-methyl ethyl imidazolium dicyanamide was blended with a high viscosity ionic liquid to reduce the electrolyte viscosity so that the highest efficiency of the battery reached 6.6% (Wang, P., S.M.Zakeeruddin, et al .(2003). "A new ionic liquid electrolyte enhances the conversion efficiency of dye-sensitized solar cells." Journal of Physical Chemistry B 107 (48): 13280-13285), but this dicyanamide ionic liquid has the disadvantage of instability

Method used

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Examples

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Embodiment 1

[0034] Embodiment 1, the preparation of ionic liquid electrolyte

[0035] 0.0013g LiI was added to 1-methyl-3-allyl imidazole carboxylic acid of 100ul, stirred to make LiI dissolve, then added 0.0025g iodine (I2 ), stirring it to dissolve, to obtain formic acid ionic liquid electrolyte; in this ionic liquid electrolyte, the molar concentration of LiI is 0.1molL -1 , I 2 The molar concentration is 0.1molL -1 .

[0036] The above-mentioned formic acid ionic liquid electrolyte was assembled into a dye-sensitized solar cell, and the photoelectric parameters of the cell were measured in Table 1.

Embodiment 2

[0037] Embodiment 2, the preparation of ionic liquid electrolyte

[0038] 0.0039g LiI is added in the 1-methyl-3-allyl imidazole carboxylic acid of 100ul, stirs to make LiI dissolve, then adds 0.0025g iodine (I 2 ), stirring it to dissolve, to obtain formic acid ionic liquid electrolyte; in this ionic liquid electrolyte, the molar concentration of LiI is 0.3molL -1 , I 2 The molar concentration is 0.1molL -1 .

[0039] The above-mentioned formic acid ionic liquid electrolyte was assembled into a dye-sensitized solar cell, and the photoelectric parameters of the cell were measured in Table 1.

Embodiment 3

[0040] Embodiment 3, the preparation of ionic liquid electrolyte

[0041] 0.0045g NaI is added in the 1-methyl-3-allylimidazole formic acid of 100ul, stirs and NaI is dissolved, then adds 0.0025g iodine (I 2 ), stirring it to dissolve, to obtain formic acid ionic liquid electrolyte; in this ionic liquid electrolyte, the molar concentration of NaI is 0.3molL -1 , I 2 The molar concentration is 0.1molL -1 .

[0042] The above-mentioned formic acid ionic liquid electrolyte was assembled into a dye-sensitized solar cell, and the photoelectric parameters of the cell were measured in Table 1.

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Abstract

The invention provides an ionic liquid electrolyte, which includes formic acid type ionic liquid and iodine elementary substances, wherein the molecular formula of the formic acid type ionic liquid is A+HCOO-, wherein A+ refers to organic cations; and the molarity of iodine elementary substances in the ionic liquid electrolyte is 0.05 mol / L<-1> to 1mol / L<-1>. The ionic liquid electrolyte provided by the invention can obtain photoelectric conversion efficiency up to 5.9% when used in a dye-sensitized solar cell, is less prone to volatilize thereby solving the problem of volatility; replaces dicyanamide ionic liquid thereby solving the problems of high possibility of degradation and toxic substance release; has the characteristic of adsorbing on the surface of a working electrode of a battery, thereby partially replacing the function of micromolecule additive, and further improving the wholly stability of the battery.

Description

technical field [0001] The invention relates to an ionic liquid electrolyte and belongs to the field of electrolyte manufacture in dye-sensitized solar cells. Background technique [0002] Dye-sensitized solar cells, as the third-generation thin-film solar cells, have attracted widespread attention due to their high performance and low cost. They are of great significance in the development of clean energy with simple preparation process, low cost and high efficiency. [0003] The electrolyte part of traditional dye-sensitized solar energy is generally composed of volatile organic solvents, iodine salts, and elemental iodine. However, the volatility of organic solvents is very detrimental to the stability and life of the overall battery, which has become a problem that affects the practical application of the battery. hindering factors. As room temperature molten salts, ionic liquids have the characteristics of wide electrochemical window, zero vapor pressure, high conducti...

Claims

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Application Information

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IPC IPC(8): H01G9/035H01G9/20H01M14/00H01L51/44
CPCY02E10/542Y02E10/549
Inventor 杨浩田林原刘佳
Owner INST OF CHEM CHINESE ACAD OF SCI
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