Inorganic/organic composite proton exchange membrane and production method thereof

A proton exchange membrane and organic technology, applied in the field of inorganic/organic composite proton exchange membrane and its preparation, can solve the problems of low output power density of fuel cells, inability to apply hot pressing process, low mechanical strength, etc., to achieve improved durability, The effect of low equipment requirements and overall cost reduction

Inactive Publication Date: 2015-06-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low mechanical strength brought about by its inherent brittleness makes it impossible to apply the hot pressing process in the membrane electrode preparation (MEA) process of the proton exchange membrane fuel cell, which makes the contact resistance between the electrode and the electrolyte very large, resulting in the output of the fuel cell. low power density

Method used

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  • Inorganic/organic composite proton exchange membrane and production method thereof
  • Inorganic/organic composite proton exchange membrane and production method thereof
  • Inorganic/organic composite proton exchange membrane and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Preparation of SiO by Modified Sol-Gel Method 2 -Nafion glass powder: firstly mix tetraethyl orthosilicate (TEOS), deionized water and hydrochloric acid in a ratio of 1:4:4×10 -3 The molar ratio was mixed and stirred at room temperature for 20 min to obtain a homogeneous sol. Then Nafion resin solution according to 50wt% SiO 2 The mass percentage of -50wt% Nafion was slowly added to the above sol and continued to stir for 20min. The obtained product was transferred to a petri dish and placed at room temperature to form a gel. Then the gel was heat-treated under water vapor at 100 °C for 480 h to obtain SiO 2 -Nafion glass pieces, crushed into glass powder for later use.

[0029] Step 2: Dissolving sulfonated polyether ether ketone (SPEEK) in dimethylformamide (DMF) to obtain a sulfonated polyether ether ketone (SPEEK) (15 wt %) solution.

[0030] Step 3: with step 1 gained glass powder and step 2 gained solution, by 2wt% (5SiO 2 -5Nafion)-98wt% SPEEK mass ...

Embodiment 2

[0033] Step 1: Preparation of SiO by Modified Sol-Gel Method 2 -Nafion glass powder: firstly mix tetraethyl orthosilicate (TEOS), deionized water and hydrochloric acid in a ratio of 1:4:4×10 -3 The molar ratio was mixed and stirred at room temperature for 20 min to obtain a homogeneous sol. Then Nafion resin solution according to 90wt% SiO 2 The mass percentage of -10wt% Nafion was slowly added to the above sol and continued to stir for 20min. The obtained product was transferred to a Teflon Petri dish and left at room temperature to form a gel. Then the gel was heat-treated under water vapor at 140 °C for 24 h to obtain SiO 2 -Nafion glass pieces, crushed into glass powder for later use.

[0034] Step 2: Sulfonated polyether ether ketone (SPEEK) was dissolved in dimethylacetamide (DMAc) to obtain a sulfonated polyetheretherketone (SPEEK) (15 wt %) solution.

[0035] Step 3: with step 1 gained glass powder and step 2 gained solution, by 40wt% (9SiO 2 -1Nafion)-60wt% SPEE...

Embodiment 3

[0038] Step 1: Preparation of SiO by Modified Sol-Gel Method 2 -Nafion glass powder: firstly mix tetraethyl orthosilicate (TEOS), deionized water and hydrochloric acid in a ratio of 1:4:4×10 -3 The molar ratio was mixed and stirred at room temperature for 20 min to obtain a homogeneous sol. Then Nafion resin solution according to 80wt% SiO 2 -20wt% Nafion mass percentage was slowly added to the above sol and continued to stir for 20min. The obtained product was transferred to a Teflon Petri dish and left at room temperature to form a gel. Then the gel was heat-treated under water vapor at 140 °C for 24 h to obtain SiO 2 -Nafion glass pieces, crushed into glass powder for later use.

[0039] Step 2: Sulfonated polyether ether ketone (SPEEK) was dissolved in dimethylacetamide (DMAc) to obtain a sulfonated polyetheretherketone (SPEEK) (15 wt %) solution.

[0040] Step 3: with step 1 gained glass powder and step 2 gained solution, by 40wt% (8SiO 2 -2Nafion)-60wt% SPEEK mass ...

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Abstract

The invention discloses an inorganic/organic composite proton exchange membrane and a production method thereof. The method comprises the following steps: introducing and fixing a perfluorosulfonic acid polymer to SiO2 skeleton to obtain proton conduction glass containing the perfluorosulfonic acid polymer, and compounding the proton conduction glass containing the perfluorosulfonic acid polymer with low-cost sulfonated polycyclic aromatic hydrocarbon polymer to obtain the inorganic/organic composite proton exchange membrane. Compared with perfluorosulfonic acid polymer proton exchange membranes (such as Nafion membrane), the composite proton exchange membrane has greatly reduced total cost due to low content of the high-cost perfluorosulfonic acid polymer; and compared with sulfonated polycyclic aromatic hydrocarbon polymers (such as sulfonated polyester ether ketone), the composite membrane has improved proton conductivity and improved durability due to the introduction of a small amount of the perfluosulfonic acid polymer in the SiO2 glass skeleton. The composite proton exchange membrane produced in the invention has the advantages of reduced cost, high proton conductivity and good durability.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an inorganic / organic composite proton exchange membrane and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is a high-efficiency and clean power generation device with fast start-up, high power density, low noise and easy maintenance. It is used in distributed power supply (home, communication base station), transportation (car), portable electronic products etc. The core component of the proton exchange membrane fuel cell is the proton exchange membrane. So far, the commercialized proton exchange membrane is mainly the perfluorosulfonic acid polymer proton exchange membrane (Nafion membrane) of DuPont Company of the United States, which has high proton conductivity and good chemical stability, but also has high cost and poor water retention capacity at low humidity. , high swelling rate and high fuel permea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10H01M2/16H01M8/1041H01M8/1072
CPCH01M8/0284H01M8/10Y02P70/50Y02E60/50
Inventor 李海滨邸志岗
Owner SHANGHAI JIAO TONG UNIV
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