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Self-humidifying solid electrolyte composits membrane and manufacturing process thereof

A technology of solid electrolyte and preparation process, applied in solid electrolyte fuel cells, sustainable manufacturing/processing, circuits, etc., can solve the problem of increasing the instability and inhomogeneity of the combination of dopants and polymer substrates, and the thickness of the composite film is very small Difficult to achieve ultra-thin level, low electrical performance, etc., to achieve the effect of enhancing the ability of CO poisoning and electrochemical reaction kinetics, strong proton conductivity, and stable discharge performance

Inactive Publication Date: 2005-03-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solid electrolyte is impermeable to water, has low electrical properties, and its preparation process has shortcomings, such as direct thermal compression bonding, which will increase the instability and inhomogeneity of the combination of dopants and polymer substrates. The thickness of the composite film is difficult to reach the ultra-thin level

Method used

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  • Self-humidifying solid electrolyte composits membrane and manufacturing process thereof
  • Self-humidifying solid electrolyte composits membrane and manufacturing process thereof
  • Self-humidifying solid electrolyte composits membrane and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] With sulfonated PBI [poly(2,2-m-(phenylene)-5,5-bibenzimidazole)] resin and H 3 PW 12 o 40 ·nH 2 The embodiment of composite film prepared by O crystalline hydrate is as follows in detail:

[0035] Using a compound high-shear crushing and dispersing machine, the crystal hydrate H 3 PW 12 o 40 ·nH 2 The O powder is crushed into 100 nanometer size particles under 600MPa liquid flow for later use. Adopt sulfonated PBI dry resin as the substrate material of composite membrane, use alcohol mixture (5vol% methanol, 50vol% ethanol, 45vol% propanol) as the solvent of sulfonated PBI dry resin, add in autoclave under argon protection Press to 8MPa, and heat to 530°C for dissolution to obtain a sulfonated PBI solution for future use. H 3 PW 12 o 40 ·nH 2 O crystalline hydrate and absolute ethanol were placed in an autoclave, pressurized to 8MPa, and heated to 110°C for dissolution to obtain a dopant solution. Press sulfonated PBI dry resin: H 3 PW 12 o 40 ·nH 2 O=...

Embodiment 2

[0037] Sulfonated polyphenylene sulfone (PS) resin and ZrHPO 4 ·nH 2 The embodiment of composite film prepared by O crystalline hydrate is as follows in detail:

[0038] The crystalline hydrate ZrHPO 4 ·nH 2 O powder is crushed into 50 nanometer size particles under 400MPa liquid flow for later use. Use sulfonated polyphenylene sulfone dry resin as the base material of the composite membrane, use absolute ethanol as the solvent of sulfonated polyphenylene sulfone dry resin, pressurize to 0.5MPa in the autoclave under the protection of nitrogen, and heat Dissolve at 650°C to obtain a sulfonated polyphenylene sulfone solution for future use. ZrHPO 4 ·nH 2 O crystalline hydrate and anhydrous pentanol were placed in an autoclave, pressurized to 1 MPa, and heated to 300°C for dissolution to obtain a dopant solution. According to sulfonated polyphenylene sulfone dry resin: ZrHPO 4 ·nH 2 O=100:1 (mass ratio) ingredients to obtain a composite membrane solution, pressurized to...

Embodiment 3

[0040] With sulfonated polyphenoxy resin (PPO) resin and H 1.28 Zn 0.36 SO 4 ·nH 2 The embodiment of composite film prepared by O crystalline hydrate is as follows in detail:

[0041] Using a compound high-shear crushing and dispersing machine, the crystal hydrate H 1.28 Zn 0.36 SO 4 ·nH 2 The O powder is crushed into 10 nanometer sized particles under 300MPa liquid flow for further use. Adopt sulfonated polyphenoxy resin as the base material of composite membrane, use alcohol mixture (45vol% methanol, 35vol% amyl alcohol, 20vol% octanol) as the solvent of sulfonated polyphenoxy resin, under argon protection Pressurize to 4MPa in the autoclave, and heat to 200°C for dissolution to obtain a sulfonated polyphenoxy resin solution for future use. H 1.28 Zn 0.36 SO 4 ·nH 2 O crystalline hydrate and absolute ethanol were placed in an autoclave, pressurized to 0.5 MPa, and heated to 200°C for dissolution to obtain a dopant solution. According to sulfonated polyphenoxy re...

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Abstract

In the invention, by using the flow-casting method and solving under high temprature and high pressure the sulfonated resin as the substrate mixed with the crystalline hydrate is formed into complex film. The complex film not containning noble metal is in low price. Water and proton can pass-through the film but electron and gas cannot. The film makes fuel cells posible to generate electricity inself-humidification mode without need of humidifiers so as to increase specific power of power generation systems. The film possesses high proton transmissibility and its conductivity can exceed 0.08S.cm-1. The power density of the fuel cells assembled by using the films can exceed 2.0W / cm2. The stable dischange perfomance allows service life more than 10000 hr. Film forming area can exceed 1m2 suitable to mass production.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell self-humidifying solid electrolyte composite membrane and a preparation process thereof, belonging to the field of fuel cell material science and technology. Background technique [0002] Proton exchange membrane fuel cells are the fifth generation of fuel cells after alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells and solid oxide fuel cells. Proton exchange membrane fuel cell (PEMFC) has the advantages of high power density, high energy conversion efficiency, low-temperature start-up, and environmental friendliness, and is the most promising power source for zero-emission electric vehicles. Research on PEMFC has become a hot spot in the field of electrochemistry and energy science, and many developed countries are investing huge sums of money in developing this technology. [0003] The proton exchange membrane is the core component of PEMFC, which is very diffe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M8/1044H01M8/1046H01M8/1051H01M8/1069
CPCY02E60/12Y02E60/521Y02E60/50Y02P70/50
Inventor 毛宗强王诚谢晓峰徐景明
Owner TSINGHUA UNIV
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