Micro-branched polymer gel electrolyte and preparation method thereof

A gel electrolyte and polymer technology, applied in capacitor electrolyte/absorbent, circuit, photosensitive equipment, etc., can solve the problems of battery packaging difficulties, dye desorption, solvent volatilization, etc., and achieve good electrochemical stability and interface resistance Effects of small, mild operating conditions

Inactive Publication Date: 2012-10-31
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 micro-branched polymer gel electrolyte and a preparation method thereof

Method used

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  • Micro-branched polymer gel electrolyte and preparation method thereof
  • Micro-branched polymer gel electrolyte and preparation method thereof
  • Micro-branched polymer gel electrolyte and preparation method thereof

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preparation example Construction

[0036] The preparation method of micro-branched polymer gel electrolyte is through micro-branched P(A-BIS) / PEG polymer and redox pair iodide / I 2 The mixed reaction forms the microbranched polymer gel electrolyte of the present invention. Specifically, the preparation method of the present invention comprises the following steps:

[0037] Step 1: Preparation of Microbranched P(A-BIS) / PEG Polymer

[0038] The reaction bottle is respectively connected with condensed water, mechanical stirring and flowing nitrogen. Firstly, polyethylene glycol, cross-linking agent N,N-methylenebisacrylamide BIS and solvent are added to the reaction bottle, and acrylate monomers such as methyl Methyl acrylate MMA, methyl acrylate, butyl acrylate BA, hydroxyethyl methacrylate, hydroxypropyl acrylate, fluoroheptyl acrylate, fluoroheptyl methacrylate, MAA methacrylate, acrylic acid in solvent ; Dissolve the initiator in tetrahydrofuran, flow nitrogen gas, raise the temperature to 50~90°C, slowly dro...

Embodiment 1

[0060] Step 1: Preparation of P(A-BIS) / PEG polymer

[0061]The reaction flask was respectively connected with condensed water, mechanical stirring and flowing nitrogen gas. Firstly, 8.58 g of polyethylene glycol, 0.04 g of cross-linking agent N,N-methylenebisacrylamide BIS and 10 g of tetrahydrofuran were added to the reaction flask. MMA 13g, BA 1g, and MAA 6g were dissolved in 25 g of solvent; 0.2 g of initiator azobisisobutyronitrile was dissolved in 5 g of tetrahydrofuran, and the temperature was raised to 70°C by flowing nitrogen gas, and the acrylate monomer The solution and the initiator solvent were slowly dropped into the reaction flask at the same time, and reacted for 24 h.

[0062] In this embodiment, the mass ratio of the monomer MMA:BA:MAA:crosslinker BIS:initiator AIBN:PEG:solvent is 1:0.07692:0.4615:0.003077:0.01538:0.66:3.077. 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 o...

Embodiment 2

[0086] Step 1: Preparation of P(A-BIS) / PEG polymer

[0087] The reaction flask was respectively connected with condensed water, mechanical stirring and flowing nitrogen. Firstly, 8.58 g of polyethylene glycol, 0.005 g of cross-linking agent N,N-methylenebisacrylamide BIS and 5 g of tetrahydrofuran were added to the reaction flask, and the acrylic acid Ester monomers MMA 13g, BA 1g, and MAA 6g were dissolved in 12.5 g of solvent; 0.2 g of initiator azobisisobutyronitrile was dissolved in 2.5 g of tetrahydrofuran, flowed nitrogen, and the temperature was raised to 70°C, and the acrylate monomer The solution and the initiator solvent were slowly dropped into the reaction flask at the same time, and reacted for 24 h.

[0088] In this embodiment, the mass ratio of monomer MMA: BA: MAA: crosslinking agent BIS: initiator AIBN: PEG: solvent is 1:0.07692:0.4615:0.00038:0.01538:0.66:1.538. The molecular formula of polyethylene glycol PEG is HO-(CH 2 CH 2 O) n H, n stands for CH 2 C...

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Abstract

The invention belongs to the technical fields of chemistry and energy batteries and relates to micro-branched polymer gel electrolyte and a preparation method thereof. The micro-branched polymer gel electrolyte is shown as the structure of a chemical formula (I). The preparation method comprises the step of mixing micro-branched poly(acrylic ester-methylenebisacrylamide) / (polyethylene glycol P (A-BIS) / PEG polymer and iodide / I2, and performing oxidation reduction to obtain the micro-branched polymer gel electrolyte. The micro-branched polymer gel electrolyte has the advantages of easiness in encapsulation, high electrochemical stability and the like and is expected to be widely applied to preparation of solar batteries. The preparation method has the characteristics of simple route, mild operation condition, simple product purification step, 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 microbranched 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. In 1991, Grötzel first used bipyridyl ruthenium (Ⅱ) complex dyes and nanoporous TiO 2 Dye-sensitized solar cells prepared from thin films achieved 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 0.5 mol / L KI, 0.05 mol / L I 2 , the solvent is propylene carbonate, and the measured conductivity at room temperature is 7.2 mS.cm -1 . However, based on liquid electrolytes and DSSCs, there are disadvantages such as difficult battery packaging, solvent volatilization, dye desorpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/022H01G9/20H01M14/00H01L51/46
CPCY02E10/549
Inventor 宋春梅张亮赵丹王永光常飞
Owner EAST CHINA NORMAL UNIV
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