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Proton conductive composite glass film and preparation method thereof

A composite glass and proton-conducting technology, applied in circuits, fuel cells, electrical components, etc., can solve problems such as poor fuel barrier performance, low proton conductivity, and application limitations of proton-conducting glass and ceramics, so as to improve mechanical strength and promote The effect of proton conduction

Inactive Publication Date: 2013-04-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above literature, the proton conductivities of the disclosed glasses and ceramics are much lower than membrane
In addition, there are still some shortcomings in the use of porous pure inorganic proton conductive glass for fuel cells. For example, the porous structure makes the fuel barrier performance of this material poor, resulting in low open circuit voltage of fuel cells and other problems.
Therefore, the application of proton-conducting glasses and ceramics is still limited

Method used

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  • Proton conductive composite glass film and preparation method thereof
  • Proton conductive composite glass film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The sol-gel method was used for material preparation: firstly, tetraethyl orthosilicate, deionized water and hydrochloric acid were mixed according to the ratio of 1:4:4×10 -3The molar ratio was vigorously stirred at room temperature for 30 minutes. Then, according to the mass percentage of ethyl orthosilicate: polyvinyl phosphoric acid = 7: 3, slowly add polyvinyl phosphoric acid aqueous solution into the solution, and stir for 20 minutes.

[0030] The obtained sol was poured into a petri dish, transformed into a gel at room temperature to form a gel, the obtained gel was placed in a heating box, and kept at 100°C for 24 hours under the condition of 1 atmospheric pressure of water vapor to obtain The phosphonic acid group-containing polymer / porous silicon dioxide proton-conductive composite glass membrane of the invention.

[0031] The composition of the proton conductive composite glass membrane prepared in this example is: a mixture of silicon dioxide and polyvinyl ...

Embodiment 2

[0035] The material was prepared by the sol-gel method: first, tetraethyl orthosilicate, deionized water and hydrochloric acid were vigorously stirred at room temperature for 30 minutes in a molar ratio of 1:0.5:0. Then, according to the mass percentage of orthosilicate:polyvinylphosphoric acid=40:1, slowly add polyvinylphosphoric acid aqueous solution into the solution, and stir for 20 minutes.

[0036] The obtained sol was poured into a petri dish, transformed into a gel at room temperature to form a gel, and the obtained gel was placed in an autoclave, and kept at 150° C. for 5 hours under the condition of 6 atmospheric pressure of water vapor.

[0037] The composition of the proton conductive composite glass membrane prepared in this example is: a mixture of silicon dioxide and polyvinyl phosphoric acid. Wherein the mass percentage of silicon dioxide is 92.0%, and the mass percentage of polyvinyl phosphoric acid is 8.0%.

[0038] The performance test data of the product o...

Embodiment 3

[0041] The material was prepared by the sol-gel method: firstly, tetraethyl orthosilicate, deionized water, hydrochloric acid and 56 Surfactants were stirred vigorously at room temperature for 30 minutes at a molar ratio of 1:12:1:0.01. Then, according to the mass percentage of ethyl orthosilicate: polyvinyl phosphoric acid = 0.38: 1, slowly add polyvinyl phosphoric acid aqueous solution into the solution, and stir for 20 minutes.

[0042] The obtained sol was poured into a petri dish, transformed into a gel at room temperature to form a gel, and the obtained gel was placed in a heating box, and kept at 100° C. for 360 hours under 1 atmospheric pressure of water vapor.

[0043] The properties of the obtained phosphonic acid group-containing polymer / porous silica proton-conductive composite glass membrane are similar to those of Example 1.

[0044] The chemical composition of the proton conductive composite glass membrane prepared in this example is: 56 Surfactant, a mixtur...

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Abstract

The invention discloses a proton conductive composite glass film and a preparation method thereof in the technical field of fuel cells. The method comprises the following steps of: fully mixing metal oxide precursor and water, stirring the mixture and phosphonic acid group-containing polymer uniformly to obtain mixed sol, pouring the mixed sol and then solidifying the mixed sol to form gel, and finally performing hydrothermal treatment on the gel to form the proton conductive composite glass film. The phosphonic acid group-containing polymer / porous silicon dioxide proton conductive composite glass film with high proton conductivity is obtained by a sol-gel method and a hydrothermal treatment process. Dense hydroxy functional groups are formed on the surfaces of porous glass and ceramic byhydrothermal treatment, and the introduction of the phosphonic acid group-containing polymer endows the material with high proton conductivity. The hydrothermal treatment process can prevent the glass from cracking. The proton conductive material can be used in the fields of fuel cells (comprising direct alcohol fuel cells), electrochemical sensors, super capacitors and the like.

Description

technical field [0001] The invention relates to a material in the technical field of fuel cells and a preparation method thereof, in particular to a polymer containing phosphonic acid groups and a porous silicon dioxide proton-conducting composite glass membrane and a preparation method thereof. Background technique [0002] Solid-state proton-conducting materials can be used as electrolyte materials for fuel cells, electrochemical sensors, and supercapacitors, so they have attracted people's attention. Proton-conducting polymer electrolytes, mainly Membranes, with high proton conductivity and certain chemical and mechanical stability, are widely used in low-temperature fuel cells. However, The membrane is expensive and has limited thermal stability; when used at high temperature, it will cause the loss of grafted functional groups; because it is a high-fluorine polymer, the recycling and disposal of materials are difficult, which brings environmental burdens. Proton-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M2/16C03C17/23C03C17/28H01M8/1051
CPCY02E60/12Y02E60/50
Inventor 李海滨蒋峰景
Owner SHANGHAI JIAO TONG UNIV
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