Membrane mobile phase of direct methanol fuel cell, and preparation method

A methanol fuel cell and mobile phase technology, applied in the field of mobile phase, can solve the problems of methanol leakage, slow methanol oxidation speed, methanol fuel loss, etc., and achieve the goal of solving methanol leakage, simplifying the battery structure and improving performance Effect

Inactive Publication Date: 2007-12-26
NANTONG UNIVERSITY
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the development of direct methanol fuel cells faces two key problems: First, the solid electrolyte membrane widely used in direct methanol fuel cells is the Nafion membrane originally designed for hydrogen-oxygen proton exchange membrane fuel cells, which has obvious methanol leakage ( crossover) phenomenon, methanol directly penetrates the Nafion membrane and is lost, resulting in a large loss of methanol fuel and a decrease in the power density of the DMFC. At the same time, met

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] The sol mobile phase is made from the raw materials of the following weight components:

[0029] CH 3 OH 5%

[0030] h 2 SO 4 20%

[0031] h 2 O 55%

[0032] Heteroacids 10%

[0033] Metal organic compound or metal salt 10%.

[0034] All the other are with embodiment 1.

Embodiment 3

[0036] The sol mobile phase is made from the raw materials of the following weight components:

[0037] CH 3 OH 55%

[0038] h 2 SO 4 10%

[0039] h 2 O 25%

[0040] Heteroacids 5%

[0041] Metal organic compound or metal salt 5%.

[0042] All the other are with embodiment 1.

Embodiment 4

[0044] The sol mobile phase is made from the raw materials of the following weight components:

[0045] CH 3 OH 30%

[0046] h 2 SO 4 14%

[0047] h 2 O 40%

[0048] Heteroacids 6%

[0049] Metal organic compound or metal salt 10%.

[0050] All the other are with embodiment 1.

[0051] Working principle of the present invention:

[0052] Generally, methanol leakage in DMFC is mainly carried out by the penetration of the mobile phase of the liquid electrolyte solution on the surface of the proton exchange membrane. Although the Gel (gel) membrane mobile phase is in close contact with the proton exchange membrane, as an immobile semi-solid phase, only diffusion occurs between methanol and the proton exchange membrane. Compared with the liquid phase, the diffusion rate is very slow. The use of membrane mobile phase can solve the problem of methanol leakage on the proton exchange membrane, improve the utilization rate of methanol, and reduce the poison...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The membrane mobile phase includes membrane carrier (MC), and gel mobile phase (GMP) membrane coated on surface of MC. Being dipped to and lifted from sol mobile phase (SMP), membrane carrier forms GMP membrane after step of air-dry. MC is silk net type metal material with high conducting power, and not dissolved to dilute sulfuric acid. SMP is prepared from methanol, vitriol, water, heteroacid, metallo-organic compound or metal salt. SMP is prepared through following steps: using metallo-organic compound or metal salt as precursor; methanol as dispersion medium in mobile phase; adding vitriol and water; through hydrolytic reaction, polycondensation reaction to form sol; doping heteroacid to produce SMP. The invention solves issue of methanol leakage radically so as to lower poisoning cathode and anode catalyst of direct methanol fuel battery (DMFB). The invention raises performance of DMFB, simplifies structure of battery, and promotes progress of industrialization of DMFB.

Description

Technical field: [0001] The invention relates to a mobile phase (flux phase) of a direct methanol fuel cell. Background technique: [0002] Direct Methanol Fuel Cell (DMFC) has the advantages of low energy consumption, high energy density, abundant sources of methanol, low price, simple system, convenient operation, low noise, etc. Promising chemical power sources have attracted widespread attention. At present, the development of direct methanol fuel cells faces two key problems: one is that the solid electrolyte membrane widely used in direct methanol fuel cells is the Nafion membrane originally designed for hydrogen-oxygen proton exchange membrane fuel cells, which has obvious methanol leakage ( crossover) phenomenon, methanol directly penetrates the Nafion membrane and is lost, resulting in a large loss of methanol fuel and a decrease in the power density of the DMFC. At the same time, methanol seeps into the cathode and reacts on the cathode, resulting in poisoning of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M8/02H01M8/10H01M8/1011H01M8/1018H01M8/1069
CPCY02E60/523Y02E60/522Y02E60/50
Inventor 鞠剑峰黄明宇吴东辉倪红军华平
Owner NANTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap