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Method for preparing composite proton membrane by filling porous substrate

A technology of pore substrate and proton membrane, which is applied in the field of composite proton membrane preparation, can solve problems such as difficult to obtain dense electrolyte, and achieve the effect of simple process

Inactive Publication Date: 2010-07-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic solid acid is a powder crystal, and the electrolyte plate is prepared by pressing method, which is difficult to obtain dense and thin electrolyte

Method used

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  • Method for preparing composite proton membrane by filling porous substrate
  • Method for preparing composite proton membrane by filling porous substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix ethyl orthosilicate [Si(OC 2 h 5 ) 4 ], propanol, water and hydrochloric acid, after stirring for 2 hours, add surfactant C 16 h 33 (OCH 2 CH 2 ) 10 The mixed solution of OH (hereinafter referred to as CEO) and n-propanol was stirred at room temperature for one hour to obtain a transparent and clear sol liquid. Immerse the Anodisc25 substrate (Whatman company) with a pore size of 100 nanometers in the tetraethyl orthosilicate sol containing a surfactant, stir ultrasonically at room temperature for 5 minutes, take out the sample, dry it at room temperature for 24 hours, dry it at 80 degrees for 20 hours, and then slowly heat up to 250 degrees and keep it warm for 8 hours to get SiO 2 (CEO) gel-filled composite structure electrolyte membrane on a ceramic substrate.

Embodiment 2

[0028] According to titanium isopropoxide:propanol:hydrochloric acid:surfactant (HO(CH 2 CH 2 ) 106 (CH 2 CH(CH 3 )O) 70 (CH 2 CH 2 ) 106 H, Pluronic F127)=1:20:0.3:0.01 ratio to prepare the sol. Add titanium isopropoxide into the mixture of propanol and hydrochloric acid; at the same time, add surfactant F127 into propanol, stir and dissolve thoroughly, mix the two solutions, and continue stirring for 2 hours to form transparent and clear TiO 2 (F127) Sol. An Anodisc25 substrate with a pore size of 200 nm was placed on the filter with TiO added 2 (F127) The sol is vacuum-filtered below to fill the pores of the substrate with the sol. Dry the sol-containing substrate at room temperature for 24 hours, dry at 80 degrees for 20 hours, and then sinter at 250 degrees for 8 hours to obtain TiO 2 (F127) A gel-filled composite structure electrolyte membrane on a substrate.

Embodiment 3

[0030] 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 according to the molar ratio of 1:10:0.1. An Anodisc25 substrate (Whatman Company) with a pore size of 20 nanometers was immersed in the sol, stirred ultrasonically at room temperature for 5 minutes, and the sample was taken out, dried at room temperature for 24 hours, dried at 80 degrees for 20 hours, and then slowly heated to 250 degrees and kept for 8 hours to obtain SiO 2 A composite structure electrolyte membrane filled with gel on a ceramic substrate.

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Abstract

The invention relates to a method for preparing a composite proton membrane by filling a porous substrate in the technical field of the non-metallic inorganic material, which comprises the following steps: mixing a metallic oxide precursor, deionized water, an organic solvent, aqueous solution of inorganic acid and an additive to prepare a sol; then adding phosphoric acid into the sol and strongly stirring the mixture to obtain a mixed sol; making the mixed sol into the porous substrate by adopting an infusion method or a filtration under reduced pressure method; and carrying out drying treatment or heat treatment on the porous substrate filled with the mixed sol to prepare the composite proton membrane. The proton conducting composite proton membrane prepared by the invention has good chemical stability and mechanical stability and low material cost and preparation cost, and can be applied in the fields of fuel cells, super capacitors, electrochemical sensors and the like.

Description

technical field [0001] The invention relates to a preparation method in the technical field of non-metallic inorganic materials, in particular to a preparation method for a composite proton membrane filled with a porous substrate. Background technique [0002] Solid-state proton-conducting materials can be used as electrolyte materials for fuel cells, chemical 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. Compared with polymer proton membranes, inorganic proton-conducting materials have...

Claims

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Application Information

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IPC IPC(8): C04B41/85
Inventor 李海滨
Owner SHANGHAI JIAO TONG UNIV