Porous membrane for hydrogen-chloride fuel battery, as well as preparation method and application of porous membrane

A technology for hydrogen chloride fuel cells and porous membranes, which is used in fuel cell parts, final product manufacturing, sustainable manufacturing/processing, etc. It can solve the problems of low membrane porosity and adsorbed acid, and achieve high acid retention. , good strength, easy to mass production effect

Inactive Publication Date: 2013-09-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the porosity and adsorbed acid amount of this membrane are low

Method used

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  • Porous membrane for hydrogen-chloride fuel battery, as well as preparation method and application of porous membrane
  • Porous membrane for hydrogen-chloride fuel battery, as well as preparation method and application of porous membrane
  • Porous membrane for hydrogen-chloride fuel battery, as well as preparation method and application of porous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: 1g of high-purity polyethersulfone (PES, molecular weight M w =58000), 0.005g SiO 2 (particle size 20-30nm), 4.6g of analytically pure DMAC and 0.3g of propylene carbonate ester were mixed, magnetically stirred at 60°C for 5h, ultrasonically mixed for 1h, left at room temperature for 3h to defoam, and scraped to form a film at room temperature. A film (thickness 85 μm) was formed by phase transformation from liquid phase to solid phase in the water. After 2 hours, the film was soaked in absolute ethanol for 4 hours, boiled in 1M hydrochloric acid at 40°C for 3 hours, and put into dilute hydrochloric acid for use. . The resulting membrane has an asymmetric structure (see the attached electron microscope photos for the lower surface, upper surface and cross-section of the membrane) figure 1 ), the contact angle of water droplets on the surface of the obtained film is 76.3 °, the porosity is 70.86%, the water absorption rate is 178.4%, the average pore diam...

Embodiment 2

[0031] Embodiment 2: 0.9g PES (M w =58000), 0.1g SiO 2 (particle size 20-30nm), 4.2g DMF and 0.26g PVP were mixed, stirred at room temperature for 1h, ultrasonically mixed for 0.5h, vacuum defoamed at 60°C for 1h, scraped on a glass plate at room temperature, and phase-inverted into a film in 30°C water ( film thickness 70 μm), soak in n-hexane for 1 day, air-dry, and cook in 3M hydrochloric acid at 80°C for 1 hour. The resulting membrane has an asymmetric structure (see the attached electron microscope photos for the lower surface, upper surface and cross-section of the membrane) figure 2), the contact angle of water droplets on the surface of the obtained film is 65.8 °, the porosity is 71.1%, the water absorption rate is 201.6%, the average pore diameter is 12.3nm, and the minimum bubble point pressure is 0.1MPa. The film surface liquid boiled in acid is wiped clean , the ionic conductivity at room temperature was tested to be 0.106S cm -1 .

[0032] The method describ...

Embodiment 3

[0034] Embodiment 3: 0.85g PES (M w =58000), 0.15g SiO 2 (particle size 10-20nm), 4g DMAC and 0.25g glycerol were ultrasonically mixed for 3 hours, stirred at room temperature for 5 hours, degassed in a vacuum oven at 60°C, scraped the film on a glass plate at room temperature, and then put it in water at 50°C for phase inversion to form a film ( 115 μm), after 4 hours, soak the film in absolute ethanol for 12 hours, boil in 3M hydrochloric acid at 60°C for 3 hours, and put it into dilute hydrochloric acid for use. The resulting membrane has an asymmetric structure (see the attached electron microscope photos for the lower surface, upper surface and cross-section of the membrane) Figure 4 ), the contact angle of water droplets on the surface of the obtained membrane is 64.1 °, the porosity is 75.31%, the water absorption is 213.4%, the average pore diameter is 9.46nm, and the minimum bubble point pressure is 0.31MPa. The membrane surface liquid boiled in acid is wiped clean ...

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Abstract

The invention relates to a porous membrane for a hydrogen-chloride fuel battery, as well as a preparation method and application. The preparation method comprises the following steps of: ultrasonically dissolving a macromolecular polymer and nano oxide particles in an organic solvent to prepare membrane production liquid, and preparing a polymer-inorganic porous membrane with an asymmetric morphor structure by adopting a phase inversion method, wherein the thickness of the prepared membrane is 25 to 150 micrometers, and the porous rate is 60 to 80 percent. The thickness, porous rate, aperture and oxide doping volume of the porous membrane prepared by the method are easy to control, the acid retention volume of the prepared membrane is high, the strength is good, the cost is low, the preparation method is simple, and the porous membrane can be well applied to the hydrogen-chloride fuel battery.

Description

technical field [0001] The invention relates to a porous membrane for hydrogen-chlorine fuel cell using chlorine gas dissolved in hydrochloric acid as a raw material and a preparation method thereof, in particular to a method for directly preparing a hydrophilic porous membrane for hydrogen-chlorine fuel cell by adopting a phase inversion method. Background technique [0002] Hydrochloric fuel cells use hydrogen as fuel and chlorine as oxidant, and the two undergo electrochemical reactions in the battery, converting the chemical energy stored in it directly into electrical energy, and at the same time can produce hydrochloric acid of required concentration. 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 mechanical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02
CPCY02E60/50Y02P70/50
Inventor 周利刘飒俞红梅邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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