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Polymer gel electrolyte and preparation method thereof

A technology of gel electrolyte and polymer, which is applied in the direction of capacitor electrolyte/absorbent, circuit, photosensitive equipment, etc. It can solve the problems of battery packaging difficulties, dye desorption, solvent volatilization, etc., and achieve fast interface charge transmission speed and interface resistance. Effects of small, mild operating conditions

Inactive Publication Date: 2012-10-17
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention overcomes the defects of battery packaging difficulty, solvent volatilization, dye desorption, corrosion of the counter electrode and short life in the prior art of electrolyte solution and DSSC, and proposes a polymer gel electrolyte and its preparation method

Method used

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  • Polymer gel electrolyte and preparation method thereof
  • Polymer gel electrolyte and preparation method thereof
  • Polymer gel electrolyte and preparation method thereof

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preparation example Construction

[0034] The preparation method of polymer gel electrolyte is through PA / PEG polymer and redox pair iodide / I 2 The mixed reaction forms the polymer gel electrolyte of the present invention. Specifically, the preparation method of the present invention comprises the following steps:

[0035] Step 1: Preparation of PA / PEG polymer

[0036] The reaction flask is respectively connected with condensed water, mechanical stirring and flowing nitrogen. First, polyethylene glycol, cross-linking agent N, N-methylenebisacrylamide BIS (also optional) and solvent are added to the reaction flask. Monomers such as methyl methacrylate MMA, methyl acrylate, butyl acrylate BA, butyl methacrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, fluoroheptyl acrylate, fluoroheptyl methacrylate Dissolve in the solvent; dissolve the initiator in the solvent, flow nitrogen gas, raise the temperature at 50-90°C, slowly drop the acrylate monomer solution and the initiator solution into the reaction ...

Embodiment 1

[0057] Step 1: Preparation of PA / PEG polymer

[0058] The reaction flask was respectively connected with condensed water, mechanical stirring and flowing nitrogen. First, 4.29 g of polyethylene glycol and 5 g of tetrahydrofuran were added to the reaction flask, and 8.5 g of acrylate monomer MMA and 0.5 g of BA were dissolved in 10 g of solvent; Dissolve 0.1 g of azobisisobutyronitrile in a solvent of 5 g of tetrahydrofuran, flow nitrogen gas, raise the temperature to 70° C., slowly drop the acrylate monomer solution and initiator solvent into the reaction flask simultaneously, and react for 24 hours.

[0059] In this embodiment, the mass ratio of monomer MMA:BA:initiator AIBN:PEG:solvent is 1:0.0588:0.01176:0.50:2.35. The molecular formula of polyethylene glycol PEG is HO-(CH 2 CH 2 O) n H, n stands for CH 2 CH 2 The average value of the number of repeating units of O is an integer of 9, and it is a commercially available reagent grade product.

[0060] Obtaining the mol...

Embodiment 2

[0080] Step 1: Preparation of PA / PEG polymer

[0081] Same as the first step in Example 1.

[0082] Step 2: Preparation of Polymer Gel Electrolyte

[0083] Prepare iodide / I 2 Electrolyte solution: same as the first step of embodiment 1

[0084] Preparation of polymer gel electrolyte: Take 4g of PA / PEG polymer treated in the first step and add it to 4g of the above electrolyte solution, then add 0.20g of electrolyte additive tert-butylpyridine, seal it in a flask, and heat it at 80°C Stir to form a homogeneous viscous solution, and then cool to room temperature to obtain a polymer gel electrolyte.

[0085] Wherein, the weight ratio of PA / PEG polymer:electrolyte solution:electrolyte additive is 1:1:0.05.

[0086] The above-mentioned electrolyte additive tert-butylpyridine can be replaced by pyridine or guanidine isothiocyanate GuSCN.

[0087] Dye-sensitized solar cells DSSC were prepared using the obtained polymer gel electrolyte. Its photovoltaic conversion efficiency η w...

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Abstract

The invention belongs to the technical fields of chemistry and energy cells and relates to a polymer gel electrolyte and a preparation method thereof. The polymer gel electrolyte is shown in the structure of a chemical formula (1). The preparation method comprises the following step of: mixing polymethyl acrylate (PA) / polyethylene glycol (PEG) polymer and redox couple iodide / I2 to react to obtainthe micro-grafted polymer gel electrolyte. The polymer gel electrolyte has the advantages of high electrochemical stability and the like, is easy to package and is expected to be widely applied in preparation of solar cells. The preparation method has the characteristics of a simple route, mild operating conditions, simple product purification steps, high yield and the like.

Description

technical field [0001] The invention belongs to the technical field of chemistry and energy batteries, and in particular relates to a polymer gel electrolyte and a preparation method thereof. Background technique [0002] Dye-sensitized solar cell (DSSC) is a new type of solar cell with high efficiency, low cost and no pollution. year 1991, First use of bipyridyl nail(II) complex dyes and nanoporous TiO 2 The dye-sensitized solar cell prepared by thin film obtained a photoelectric conversion efficiency of 7.1%. Since then, DSSC has been continuously studied by many researchers and has made great progress. In U.S. Patent US 6 479 745, the liquid electrolyte components are 0.5mol / L KI, 0.05mol / L I 2 , the solvent is propylene carbonate, and the measured conductivity at room temperature is 7.2mS.cm -1 . However, based on liquid electrolytes and DSSCs, there are disadvantages such as difficult battery packaging, solvent volatilization, dye desorption, corrosion of the cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/022H01G9/20H01M14/00H01L51/46H01L51/48
CPCY02E10/50Y02E10/549
Inventor 宋春梅王永光赵丹张亮唐妙根谢美然梁晟斌常飞韩会景
Owner EAST CHINA NORMAL UNIV
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