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Preparation method of high-performance composite proton exchange membrane of fuel cell

A proton exchange membrane and fuel cell technology, which is applied in the field of composite proton exchange membrane preparation, can solve problems such as poor mechanical properties of proton exchange membranes, lower methanol permeability coefficient, and need to improve electrical conductivity, so as to achieve high proton conductivity and reduce methanol The effects of transmittance and excellent mechanical properties

Active Publication Date: 2012-08-01
山东兴丰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

V. Ramani and others have studied the blending of Nafion and HPA to prepare composite membranes, which can increase the use temperature and reduce relative humidity, but the electrical conductivity needs to be improved
[0009]The traditional modification method inevitably causes the loss of proton conductivity while reducing the methanol permeability coefficient or, and the mechanical properties of the modified proton exchange membrane are poor. extremely low lifespan

Method used

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  • Preparation method of high-performance composite proton exchange membrane of fuel cell
  • Preparation method of high-performance composite proton exchange membrane of fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The first step is to pretreat the commercial Nafion resin solution: use vacuum distillation to remove low-boiling alcohols in the Nafion resin solution within the temperature range of 65 ° C, and the distillation speed is controlled at 1 drop / s of the receiving pipe receiving the fraction Preferably, the distillation time is 1h, and then use N,N-dimethylformamide (DMF) to redissolve the Nafion resin, and configure it into a 5wt% Nafion resin solution for later use;

[0045] The second step, pretreatment of inorganic additives:

[0046] (a) Dissolve 90 parts of sodium-based bentonite dry material in 1000 parts of deionized water, and stir at high speed or ultrasonically for 60 minutes to form a sodium-based bentonite suspension;

[0047] (b) Mix 30 parts of quaternary ammonium salt composite organic modifier in 400 parts of solvent, stir and dissolve to form a homogeneous system. The composite organic modifier is dodecyltrimethylammonium bromide and Tetraalkyltrimethyla...

Embodiment 2

[0059] The first step is to pre-treat the commercial Nafion resin solution: use vacuum distillation to remove low-boiling alcohols in the Nafion resin solution within the temperature range of 80 °C, and the distillation speed is controlled at 2 drops / s of the receiving pipe receiving the fraction Preferably, the distillation time is 1h, and then the Nafion resin is redissolved with N,N-dimethylformamide (DMF) to prepare a 10 wt% Nafion resin solution for later use;

[0060] The second step, pretreatment of inorganic additives:

[0061] (a) Dissolve 90-120 parts of bentonite dry material in 1100 parts of deionized water, and stir at high speed or ultrasonically for 50 minutes to form a suspension system;

[0062] (b) Mix 35 parts of quaternary ammonium salt composite organic modifier in 350 parts of solvent, stir and dissolve to form a homogeneous system. The composite organic modifier is cetyltrimethylammonium bromide and cetyl Hexaalkylpyridine;

[0063] According to the ad...

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Abstract

The invention discloses a preparation method of a high-performance composite proton exchange membrane of a fuel cell. The proton exchange membrane prepared through adding modified bentonite, sulfonated polybenzimidazole and sulfonated phenyl sodium phosphate to a Nafion membrane and spraying platinum ruthenium (PtRu) / carbon nanofiber to the Nafiton membrane has obvious advantages in the aspects of electrical conductivity under normal temperature or high temperature, alcohol-rejecting ability and mechanical strength, thereby guaranteeing steady electrochemical performance and a good electrochemical effect of the fuel cell. The preparation method is simple to operate, facilitates the preparation and has a good application prospect.

Description

technical field [0001] The invention relates to a method for preparing a proton exchange membrane used in a fuel cell, in particular to a method for preparing a composite proton exchange membrane modified for the commercial Nafion membrane of DuPont Company in a perfluorosulfonic acid membrane. Background technique [0002] A fuel cell is a clean, efficient, and quiet-running electrochemical engine. Proton exchange membrane fuel cell (PEMFC) is the fifth generation developed after alkaline fuel cell (AFC), phosphoric acid fuel cell (PAFC), molten carbonate fuel cell (MCFC) and solid oxide fuel cell (SOFC) The fuel cell. In addition to the general characteristics of fuel cells, PEMFC also has outstanding advantages such as starting at room temperature, no electrolyte loss, easy water discharge, long life, and high specific power and specific energy. Therefore, it can not only be used to build decentralized power stations, but also is particularly suitable for use as a mobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M8/1088
CPCY02E60/522Y02E60/50
Inventor 姜波
Owner 山东兴丰新能源科技有限公司
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