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Organic/inorganic composite enhancement type anhydrous proton conducting film and method for preparing same

A proton conductive membrane, inorganic composite technology, applied in non-aqueous electrolyte batteries, organic electrolyte batteries, circuits, etc., can solve problems such as agglomeration, and achieve the effect of solving agglomeration and improving proton conductivity.

Inactive Publication Date: 2010-09-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, nano-silica is pre-dispersed in a specific organic solvent and then blended, which solves the problem that direct doping of nano-inorganic particles easily leads to agglomeration

Method used

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  • Organic/inorganic composite enhancement type anhydrous proton conducting film and method for preparing same
  • Organic/inorganic composite enhancement type anhydrous proton conducting film and method for preparing same
  • Organic/inorganic composite enhancement type anhydrous proton conducting film and method for preparing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The ratio of raw materials used is as follows:

[0030] 1 part of PBI-ph (number of moles of repeating units)

[0031] Nano silica microspheres (average particle diameter 80nm, surface modified with KH-570) 0.26 parts (number of moles)

[0032] 500 parts of N-methylpyrrolidone (moles)

[0033] Preparation method of composite membrane:

[0034] 1 g of PBI-ph was dissolved in 160 ml of N-methylpyrrolidinone to obtain a PBI-ph solution. Mix 0.5 g of the ethanol dispersion of modified nano-silica microspheres with 0.1 g of N-methylpyrrolidinone, ultrasonically disperse them and put them in a vacuum oven to dry off the ethanol to obtain modified nano-silica in N-methylpyrrolidone. Add the dispersion liquid in the base pyrrolidone to the PBI-ph solution to obtain the mixed liquid of PBI-ph and nano silicon dioxide. The mixed solution was poured on a flat polytetrafluoroethylene plate, and dried in a vacuum oven at 130°C for 24 hours to obtain a PBI-ph / nano silicon dioxide...

Embodiment 2

[0044] The ratio of raw materials used is as follows:

[0045] 1 part of PBI-ph (number of moles of repeating units)

[0046] Nano silica microspheres (average particle size 80nm, surface modified with KH-550) 1 part (number of moles)

[0047] 160 parts of N, N-dimethylacetamide (number of moles)

[0048] Preparation method of composite membrane:

[0049] Dissolve 2 g of PBI-ph in 95 ml of N,N-dimethylacetamide to obtain a PBI-ph solution. Mix the ethanol dispersion of 3.8g of modified nano-silica microspheres with 0.6g N, N-dimethylacetamide, put it into a vacuum oven after ultrasonic dispersion, and dry the ethanol to obtain modified nano-silica in N, The dispersion liquid in N-dimethylacetamide, this dispersion liquid is added in the PBI-ph solution, promptly obtains the mixed liquid of PBI-ph and nano silicon dioxide. The mixed solution was poured on a flat polytetrafluoroethylene plate, and dried in a vacuum oven at 160°C for 22 hours to obtain a PBI-ph / nano silicon d...

Embodiment 3

[0052] The ratio of raw materials used is as follows:

[0053] 1 part of PBI-ph (number of moles of repeating units)

[0054] Nano silica microspheres (average particle diameter 80nm, surface modified with KR-9S) 0.01 part (number of moles)

[0055] N, N-dimethylformamide 166 parts (moles)

[0056] Preparation method of composite membrane:

[0057] 2 g of PBI-ph was dissolved in 100 ml of N,N-dimethylformamide to obtain a PBI-ph solution. Mix 0.04g of the ethanol dispersion of modified nano-silica microspheres with 0.1g N,N-dimethylformamide, put it into a vacuum oven after ultrasonic dispersion, and dry the ethanol to obtain modified nano-silica in N, The dispersion liquid in N-dimethylformamide, this dispersion liquid is added in the PBI-ph solution, promptly obtains the mixed liquid of PBI-ph and nano silicon dioxide. The mixed solution was poured on a flat polytetrafluoroethylene plate, and dried in a vacuum oven at 120°C for 23 hours to obtain a PBI-ph / nano silicon di...

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Abstract

The invention belongs to the technical field of organic / inorganic composite functional materials and electro-chemical, in particular to an organic / inorganic composite strengthened anhydrous proton conductive film and a preparation method thereof; the composition of the conductive film is as follows: 1 portion of polybenzimidazole which is calculated by the repeated unit mole number, 0.01 portion to 1 portion of nano silicon dioxide which is calculated by the mole number, and 160 portions to 500 portions of organic solvent which is calculated by the mole number. The detailed preparation steps are as follows: the polybenzimidazole is dissolved in the organic solvent, and polybenzimidazole solution is obtained; the dispersion solution of the modified nano silicon dioxide in absolute ethyl alcohol is mixed with the organic solvent, the ethyl alcohol is removed through ultrasonic oscillation, to obtain the dispersion solution of the modified nano silicon dioxide in high-boiling organic solvent; the product is added into the polybenzimidazole solution, to obtain the mixed solution which contains polybenzimidazole and nano silicon dioxide; the obtained mixed solution is cast on a smooth PTFE plate and dried, and the required product is obtained. The preparation process of the invention has good controllability, good nano inorganic particle dispersivity, and high mechanical strength and good size stability compared with traditional full fluosulfonic acid films, and has broad application prospect in polyelectrolyte film fuel batteries.

Description

technical field [0001] The invention belongs to the technical field of organic / inorganic composite functional materials and electrochemistry, and specifically relates to an organic / inorganic composite enhanced non-aqueous proton conductive membrane and a preparation method thereof. Background technique [0002] Compared with the commonly used normal temperature PEMFC, the medium temperature (100-200 ℃) system polymer electrolyte membrane fuel cell (PEMFC) has high catalyst activity, high allowable concentration of impurities such as CO, high fuel utilization rate, and high battery energy density. And the system is relatively simple and so on. Polymer electrolyte membranes commonly used in fuel cells are Such as perfluorosulfonic acid membrane, this type of membrane is only suitable for aqueous systems, and will lose its proton conductivity due to dehydration above 100 ° C. Therefore, research and development of polymer non-aqueous proton conductive materials is a direction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/04C08K3/26C08J5/22H01M8/02H01M6/16H01M8/0202H01M8/1016H01M8/1018H01M8/1069
CPCY02E60/50
Inventor 浦鸿汀刘璐常志宏杨正龙
Owner TONGJI UNIV