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A Methanol-Dimethyl Ether Mixed Steam Feed Fuel Cell System

A fuel cell system and fuel cell technology, used in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of slow electro-oxidation rate and low performance of dimethyl ether, and improve cell performance and fuel penetration. The effect of reducing and simplifying the system structure

Active Publication Date: 2020-12-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electro-oxidation rate of DME is slower than that of methanol, so the performance of direct DME fuel cells is lower than that of direct methanol fuel cells

Method used

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  • A Methanol-Dimethyl Ether Mixed Steam Feed Fuel Cell System
  • A Methanol-Dimethyl Ether Mixed Steam Feed Fuel Cell System
  • A Methanol-Dimethyl Ether Mixed Steam Feed Fuel Cell System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Membrane electrode composition: the gas diffusion layer of the cathode and anode is TGP-060; the anode microporous layer is a mixture of 0.5mg / cm2 carbon powder and Nafion, and the mass fraction of Nafion is 10%; the anode catalyst layer is PtRuPd / C, Nafion mixture, wherein the massfraction of Nafion is 15%. The anode microporous layer is 2mg / cm carbon powder, PTFE mixture, and wherein the massfraction of PTFE is 30%; Because the extremely catalytic layer is Pt / C, Nafion solution mixture, wherein The mass fraction of Nafion is 20%. The proton exchange membrane used is Nafion212.

[0038] Photos of the above formula materials figure 1 Arranged in sequence, hot pressing at 120°C and 2,000 pounds of pressure for one minute to make an integrated membrane electrode. A stainless steel end plate with a dotted flow field, and the above-mentioned integrated membrane electrode are assembled into a battery in sequence.

[0039] Pass the methanol-dimethyl ether mixed solution (...

Embodiment 2

[0043] Membrane electrode composition: the gas diffusion layer of the cathode and anode is TGP-060; the anode microporous layer is a mixture of 0.5mg / cm2 carbon powder and Nafion, and the mass fraction of Nafion is 10%; the anode catalyst layer is PtRuSn / C, Nafion mixture, wherein the mass fraction of Nafion is 15%. The anode microporous layer is 2mg / cm 2 carbon powder, PTFE mixture, wherein the mass fraction of PTFE is 30%; because the extremely catalytic layer is a Pt / C, Nafion solution mixture, wherein the mass fraction of Nafion is 20%. The proton exchange membrane used is Nafion212. In order to improve the water return ability of the cathode, a water-blocking layer is added between the cathode diffusion layer and the plate. Its main composition is a mixture of carbon powder and PTFE, and the load is 0.8mg / cm 2 . The above materials were hot-pressed at 120°C and 2,000 pounds of pressure for one minute to make an integrated membrane electrode. A stainless steel end plate...

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Abstract

The invention provides a methyl alcohol-dimethyl ether mixed steam feeding fuel cell system. The fuel cell system comprises a mixed fuel storing tank, a single cell of a fuel cell or an electric pileof the fuel cell, and an air pump, wherein the mixed fuel of methyl alcohol-dimethyl ether is stored in the mixed fuel storing tank; the mixed fuel contains 5-40% by molar of methyl alcohol; an outletof the mixed fuel storing tank is communicated with an anode inlet of the single cell of the fuel cell or the electric pile of the fuel cell and is used for supplying the reaction fuel to the singlecell of the fuel cell or the electric pile of the fuel cell; the air pump is used for supplying an oxidant to the single cell of the fuel cell or the electric pile of the fuel cell. Compared with theprior art, the system has the advantages that methyl alcohol and dimethyl ether are mixed on the basis of certain ratio, so that the feeding can be performed in a gaseous form without any external evaporating device, as a result, the system structure is greatly simplified; moreover, the fuel permeation is greatly reduced, and the cell performance is improved.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a methanol-dimethyl ether mixed steam feed fuel cell. Background technique [0002] Fuel cell is a kind of energy conversion device that directly converts fuel chemical energy into electrical energy. It has many advantages such as high efficiency, no pollution, and low noise. It has broad application prospects in the fields of power supply, backup power supply and mobile power supply. [0003] Liquid methanol is convenient for storage and transportation, and has a high electrochemical oxidation rate, so it is an ideal fuel for fuel cells. In the field of portable power supply, direct methanol fuel cell (DMFC) has obvious advantages, and has been applied in many fields such as field exploration and unattended operation. However, the problem of methanol permeation is a major international problem in DMFC, which has three consequences: one is to reduce the fuel utilization rate; To the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1011H01M8/04014H01M8/04089
CPCH01M8/04014H01M8/04022H01M8/04089H01M8/1011Y02E60/50
Inventor 杨林林孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI