Vanadium cell nafion proton membrane and preparation method thereof

A technology of perfluorosulfonic acid and perfluorosulfonic acid resin, applied in the field of proton exchange membrane, can solve the problems of reducing the proton conductivity of proton membrane, unstable physical cross-linking, hindering the transfer of hydrated protons, etc. Vanadium has the effect of good performance and high reliability

Inactive Publication Date: 2012-08-15
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the technology of publication number CN101773793 prepared perfluorosulfonic acid resin and SiO 2 Composite membranes are used in fuel cells, but this physical cross-linking is not stable enough, SiO 2 During the long-term use of the stack, it will be precipitated and cause pollution; the technologies of publication number CN101764233 and publication number CN101764234 respectively propose a kind of hydrophobic small molecule binary or polyamine cross-linked perfluorosulfonic acid proton membrane, although this technology can improve The chemical and mechanical properties of the proton membrane under high temperature and oxidation conditions have been clarified, but the contribution of this structure to the energy efficiency of vanadium batteries has not been proposed, and the hydrophobic and dense structure at the crosslink will hinder the transfer of hydrated protons, which will reduce the proton density of the proton membrane. Conductivity

Method used

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  • Vanadium cell nafion proton membrane and preparation method thereof
  • Vanadium cell nafion proton membrane and preparation method thereof
  • Vanadium cell nafion proton membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1). Dissolve 1kg of perfluorosulfonic acid resin (with an exchange capacity of 1.0mmol / g) and 5g of N,N-dimethyl-4-aminopyridine in 19kg of dimethylformamide at a temperature of 200°C. The pressure is 0.5MPa, the dissolution time is 2h, and a transparent solution with a mass fraction of 5% is obtained;

[0045] 2). Weigh 11.5 g of D230 polyetheramine (number average molecular weight 230) and dissolve it in the transparent solution prepared in step 1), and stir at 50°C for 3 hours to perform pre-crosslinking;

[0046] 3). Put the pre-crosslinking solution prepared in step 2) into a thin film evaporator for concentration to a gel state substance with a mass fraction of about 25%; the effective evaporation area of ​​the thin film evaporator is 1m 2 , the cooling area of ​​the condenser is 20m 2 , the evaporation temperature is 50°C, and the concentration time is 0.5h; in addition to the thin film evaporator, other evaporators with the same function can also be used for the ...

Embodiment 2

[0051] 1). Dissolve 1.5kg perfluorosulfonic acid resin (exchange capacity: 0.9mmol / g) and 10.5g N,N-dimethyl-4-aminopyridine in a mixed solution of 18.5kg dimethylformamide and 5kg ethanol , the dissolution temperature is 220°C, the dissolution pressure is 2.5MPa, and the dissolution time is 2h, a transparent solution with a mass fraction of 6% is obtained;

[0052] 2). Weigh 25g of D400 polyetheramine (number-average molecular weight: 400) and dissolve it in the transparent solution in step 1), and stir at 70°C for 3 hours to perform pre-crosslinking;

[0053] 3). Put the pre-crosslinking solution prepared in step 2) into a thin-film evaporator for concentration to a gel-state substance with a mass fraction of about 20%; the effective evaporation area of ​​the thin-film evaporator is 1m 2 , the cooling area of ​​the condenser is 20m 2 , the evaporation temperature is 80°C, and the concentration time is 1 hour; in addition to the thin film evaporator, other evaporators with t...

Embodiment 3

[0057] 1). Dissolve 1.5kg of perfluorosulfonic acid resin (with an exchange capacity of 1.1mmol / g) in a mixed solution of 22.5kg of N-methylpyrrolidone and 26kg of isopropanol at a temperature of 220°C and a pressure of 1.5MPa. Dissolving time is 3h, obtains the transparent solution that mass fraction is 3%;

[0058] 2). Weigh 150g of D2000 polyetheramine (number average molecular weight: 2000) and dissolve it in the transparent solution prepared in step 1), and stir at 80°C for 4 hours to perform pre-crosslinking;

[0059] 3). Put the pre-crosslinking solution prepared in step 2) into a thin-film evaporator for concentration to a gel-state substance with a mass fraction of about 15%; the effective evaporation area of ​​the thin-film evaporator is 1m 2 , the cooling area of ​​the condenser is 20m 2 , the evaporation temperature is 80°C, and the concentration time is 1 hour; in addition to the thin film evaporator, other evaporators with the same function can also be used for ...

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Abstract

The invention discloses a vanadium cell nafion proton membrane and a preparation method thereof. The vanadium cell nafion proton membrane is prepared from a cross-linking substance of nafion resin and polyether amine. The preparation method comprises the following steps: carrying out crosslinking to hydrophilic macromolecular polyether amine and the nafion resin in a solution so as to carry out cross-linking reaction on amino groups at two ends of a hydrophilic macromolecular polyether amine molecular chain and the sulfonic acid group of the nafion resin; and volatilizing a solvent to prepare the hydrophilic cross-linking nafion proton membrane. The proton membrane disclosed by the invention has the characteristics of high compact degree, good vanadium blocking performance, high proton conductivity and high reliability, and the energy efficiency of a pile is effectively improved; and the preparation method is easy to operate and high in production efficiency, and is suitable for mass production.

Description

technical field [0001] The invention relates to a proton exchange membrane for a vanadium battery (that is, an all-vanadium redox flow battery), in particular to a vanadium battery perfluorosulfonic acid proton membrane and a preparation method for the proton membrane. Background technique [0002] The increasingly scarce energy and environmental pollution have made clean and renewable energy the focus of energy development. Among them, solar energy and wind energy are representatives of clean and renewable energy. The large-scale utilization of new energy such as wind energy and solar energy in China and the world has entered a new development period. However, whether it is wind power or photovoltaic power generation, its large-scale grid connection and popularization and application will pose new challenges to the power system's power peak regulation, power grid security and reliability. Therefore, the importance and urgency of researching and applying corresponding energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/20H01M8/02
CPCY02E60/50Y02P70/50
Inventor 苟鹏飞吴红兵钟连兵肖毅胡星
Owner DONGFANG TURBINE CO LTD
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