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Ionic liquid-polymer composite membrane for hydrogen chloride fuel cell and preparation and application thereof

A hydrogen chloride fuel cell and ionic liquid technology, applied in fuel cells, solid electrolyte fuel cells, circuits, etc., can solve the problems of no new type of electrolyte membrane research, material corrosion, etc., and achieve easy control of doping amount and high conductivity , low cost effect

Inactive Publication Date: 2014-10-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, research on hydrogen-chlorine fuel cells is still in the exploratory stage, and there are only 4 patents at home and abroad (USP4128701, CN86104831, CN1805196), and these patents are all about the selection and optimization of electrode materials such as battery systems or catalysts. Nafion membrane (USP4128701, JP3150803-U, CN1805196) or direct use of hydrochloric acid and other solutions as the electrolyte (CN86104831), there is no research on new types of electrolyte membranes, and it is found that most of the reported materials on the cathode side of the battery are liquid (chlorine gas dissolved in hydrochloric acid ), the anode side is hydrogen gas, this feeding method is likely to cause problems such as material corrosion

Method used

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  • Ionic liquid-polymer composite membrane for hydrogen chloride fuel cell and preparation and application thereof
  • Ionic liquid-polymer composite membrane for hydrogen chloride fuel cell and preparation and application thereof
  • Ionic liquid-polymer composite membrane for hydrogen chloride fuel cell and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: 0.25g high-purity polybenzimidazole (PBI, molecular weight M w =58000), mixed with 30g of analytically pure DMF, stirred magnetically at room temperature for 5h, filtered through filter paper, added 1.25g of diethylmethylamine trifluoromethanesulfonate ([dema]TfO) and ultrasonically mixed for 1h, oil at 80°C Stir in the bath for 5h, stand still at room temperature for 2h to defoam, and form a film in an oven at 80°C. The film thickness was 60 μm. The obtained film has a compact structure (see the attached electron microscope photo of the film section) figure 1 ), using the AC impedance method (EIS) to test its conductivity at different temperatures (no humidification at all, see attached figure 2 ), the breaking strength is 20MPa.

[0027] The electrode is prepared by the method described in the patent CN02127802.4 (the binder is PBI, the catalyst is 70% Pt / C), and the Pt loading of the catalyst in the electrode is 0.4mg cm -2 . In order to ensure th...

Embodiment 2

[0029] Embodiment 2: 0.3g polyethersulfone (PES, M w =60000), 30g NMP mixed, stirred at room temperature for 1h, added 1g1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIm]BF 4 ), ultrasonically mixed for 0.5h, stirred in an oil bath at 90°C for 3h, then stood still for 1h for degassing, and formed a film in an oven at 80°C. The film thickness was 125 μm. The obtained film has a compact structure (see the attached electron microscope photo of the film section) Figure 4 ), using the four-probe method to test its conductivity at different temperatures (no humidification at all, see attached Figure 5 ), the breaking strength is 15MPa.

Embodiment 3

[0030] Example 3: 10g of Nafion solution (DuPont, 5wt.%) and 10g of DMAC were ultrasonically mixed for 3h, and 1g of 1-methyl-3-butylsulfonic acid imidazole hydrogen sulfate ([BMIm]HSO 3 HSO 4 ), stirred at room temperature for 5 hours, then stood still for 3 hours to degas, and cast a film in an oven at 60°C. The film thickness was 100 μm. The obtained film has a compact structure (see the attached electron microscope photo of the film section) Image 6 ), using the four-probe method to test its conductivity at different temperatures (no humidification at all, see attached Figure 7 ), the breaking strength is 30MPa.

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Abstract

A preparation method of an ionic liquid-polymer composite membrane for a hydrogen chloride fuel cell comprises the following steps: a high molecular polymer substrate and an ionic liquid are dissolved in an organic solvent to prepare a membrane preparing liquid, then the ionic liquid-polymer composite membrane is prepared by a casting method, and during the method, a feed gas is in no need of humidifying. The prepared composite membrane has the advantages of high conductivity, low permeability and the like. The hydrogen chloride fuel cell prepared by use of the composite membrane can be stable in operation.

Description

technical field [0001] The invention relates to an ionic liquid-polymer composite membrane for a hydrogen-chlorine fuel cell that does not require humidification of the feed gas and a preparation method thereof, in particular to an ionic liquid-polymer for a hydrogen-chlorine fuel cell that is directly prepared by a casting method Composite membrane method. Background technique [0002] Hydrochloric fuel cells use hydrogen as fuel and chlorine as oxidant, and electrochemical reactions occur at the anode and cathode, respectively, and the chemical energy stored in them is directly converted into electrical energy, and hydrogen chloride is generated at the same time. Therefore, an electrolyte separator is needed to separate the cathode and the anode. Proton exchange membrane (PEM) is one of the core components of proton exchange membrane fuel cell (PEMFC). An ideal PEM should have high proton conductivity, low gas and liquid permeability, high ion selectivity, high enough mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10C08J5/18H01M8/1048
CPCC08J5/18H01M8/1046H01M8/1069Y02E60/50Y02P70/50
Inventor 周利刘飒王鹏杰邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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