Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A composite membrane for high temperature water electrolysis and its preparation method and application

A technology of high-temperature water and composite membranes, applied in applications, electrolytic components, electrolytic processes, etc., can solve the problems of limited improvement of proton conductivity, low conductivity of ionic liquids, and large catalyst poisoning effect, and achieve excellent mechanical strength and good Excellent proton conductivity and oxidation resistance

Active Publication Date: 2022-05-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a limited effect on improving the proton conductivity of the membrane, and the maximum operating temperature is 120°C
J.Mater.Chem, 2006, 16, 2256–2265 Doping ionic liquids in PVDF membranes to prepare composite membranes can get rid of the disadvantages that proton conduction depends on water, but ionic liquids have disadvantages such as low conductivity and large poisoning effect on catalysts. , it is currently not practical to apply

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A composite membrane for high temperature water electrolysis and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step1: Weigh 7.24g of cesium sulfate (0.02mol) and 2.0g of concentrated sulfuric acid (98%, 0.02mol), add slowly to 50ml of deionized water respectively, stir fully with a glass rod, and obtain a transparent and clear solution after fully reacting. After the solution is put into an oven for drying, cesium bisulfate is obtained;

[0025] Step2: Weigh 0.03g mPBI, 0.06g PVDF and dissolve in 27g NMP, stir magnetically for 6 hours to obtain a polymer solution;

[0026] Step3: Weigh 0.21g of cesium bisulfate prepared in Step1 and add it to the polymer solution in Step2, ultrasonically disperse, the ultrasonic power is 200W, and the ultrasonic time is 10h, to obtain a milky white casting solution, which is cast on a flat glass with grooves, After vacuum drying at 80° C. for 30 h, a composite proton exchange membrane for a high-temperature fuel cell was obtained.

Embodiment 2

[0028] Step1: Weigh 7.24g of cesium sulfate (0.02mol) and 4.0g of concentrated sulfuric acid (98%, 0.04mol), add slowly to 70ml of deionized water respectively, stir fully with a glass rod, and obtain a transparent and clear solution after fully reacting. After the solution is put into an oven for drying, cesium dihydrogen sulfate is obtained;

[0029] Step2: Weigh 0.01gmPBI, 0.04g PVDF, 0.01g PTFE and dissolve / disperse in 30gDMAc, stir magnetically for 6h to obtain a polymer solution;

[0030] Step3: Weigh 0.24g of cesium dihydrogen sulfate prepared in Step1 and add it to the polymer solution in Step2, ultrasonically disperse, the ultrasonic power is 300W, and the ultrasonic time is 12h, to obtain a milky white film casting solution, which is cast on a flat glass with grooves , 80 DEG C vacuum drying for 30 hours to obtain a composite proton exchange membrane for high-temperature fuel cells.

Embodiment 3

[0032] Step1: Weigh 7.24g of cesium sulfate (0.02mol) and 4.0g of concentrated sulfuric acid (98%, 0.04mol), add slowly to 70ml of deionized water respectively, stir fully with a glass rod, and obtain a transparent and clear solution after fully reacting. After the solution is put into an oven for drying, cesium dihydrogen sulfate is obtained;

[0033] Step2: Weigh 0.045g mPBI, 0.006g PVDF and dissolve in 30g DMAc, stir magnetically for 6 hours to obtain a polymer solution;

[0034] Step3: Weigh 0.20g of cesium dihydrogen sulfate prepared in Step1 and add it to the polymer solution in Step2, ultrasonically disperse, the ultrasonic power is 300W, and the ultrasonic time is 12h, to obtain a milky white casting solution, which is cast on a flat glass with grooves , 80 DEG C vacuum drying for 30 hours to obtain a composite proton exchange membrane for high-temperature fuel cells.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of proton exchange membrane fuel cells, and in particular relates to a high-temperature water electrolysis composite membrane and its preparation method and application. Its raw materials include polybenzimidazole, fluorocarbon resin, and proton conductor; the mass fraction of the proton conductor is 20-85wt.%, the mass fraction of polybenzimidazole resin is 0.8-15wt.%, and the mass fraction of fluorocarbon resin is 0.8-20wt.%; the proton conductor is one or both of cesium bisulfate and cesium dihydrogen sulfate. First prepare the high-temperature proton conductor, then dissolve polybenzimidazole and fluorocarbon resin in a strong polar aprotic solvent to obtain a polymer solution, add the proton conductor to the polymer solution, and ultrasonically disperse to obtain a uniformly dispersed casting solution, which is cast in On the flat glass with grooves, the high-temperature water electrolysis composite film can be obtained after vacuum drying. The composite membrane has good proton conductivity at high temperature and exhibits good performance in high-temperature water electrolysis.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cells, and in particular relates to a high-temperature water electrolysis composite membrane and its preparation method and application. Background technique [0002] Water electrolysis provides an energy conversion route to produce hydrogen from water. If the power source of electrolyzed water is completely from renewable energy, it can truly realize CO 2 zero emissions. The purity of hydrogen obtained in this way is very high, which can reach more than 99.99%. However, the research direction of conventional water electrolysis is still mainly focused on the electrolysis of liquid water, which brings a series of problems such as low electrode kinetic reaction rate, large amount of noble metal catalyst, and low electrolysis energy utilization rate. [0003] High-temperature water electrolysis uses water vapor as raw material to electrolyze hydrogen, which has the advantages ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25B13/08C25B1/04H01M8/1048H01M8/1069B29D7/01
CPCC25B13/08H01M8/1048H01M8/1069B29D7/01Y02E60/50Y02E60/36
Inventor 邵志刚吕波
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com