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Integrated preparing method for molten carbonate fuel cell electrolyte membrane

A technology of molten carbonate and electrolyte membrane, which is applied in the direction of molten electrolyte fuel cells, fuel cell parts, electrolyte holding devices, etc., can solve problems such as troubles, reduce engineering difficulty, reduce construction costs, and shorten manufacturing time Effect

Inactive Publication Date: 2009-07-08
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The electrolyte material prepared by the above method needs to adopt two processes, that is, the substrate diaphragm of the electrolyte and the electrolyte salt need to be prepared separately, and when preparing the substrate diaphragm of the electrolyte, whether it is an organic solvent method or water is used as a solvent, All of the above methods contain binders, and the prepared electrolyte diaphragm has a process of removing polymers such as binders during the start-up stage of the actual molten carbonate fuel cell, that is, in a temperature range below 400°C, Organic solvents or water will volatilize as the temperature rises, and polymers such as dispersants, adhesives, and plasticizers will also volatilize as the temperature rises. In this way, each battery assembled at room temperature There is a big difference between the thickness of the battery and the thickness of the battery at the working temperature (usually 650°C), that is, the height of the initial installation of the battery stack assembled from multiple single batteries at room temperature is much greater than that of the normal work This height difference will bring a lot of trouble to the structure and installation of the entire molten carbonate fuel cell power generation system

Method used

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  • Integrated preparing method for molten carbonate fuel cell electrolyte membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 0.01~0.3μm α-LiAlO 2 100 grams of powder, add 800 grams of secondary water, after ball milling for 24 hours, add Li with a molar ratio of 62 / 38 2 CO 3 / K 2 CO 3 100 grams of electrolyte salt, after ball milling for 2 hours, add 10 grams of Al 2 o 3 After the fiber, continue ball milling for 1 hour, and use it as a slurry for later use.

[0020] like figure 1As shown, the anode 1 and the cathode 3 are respectively embedded in the grooves of the bipolar plate 2, the anode 1 and the bipolar plate 2 and the cathode 3 and the bipolar plate 2 respectively constitute two planes up and down, and the above slurry is cast Membrane-making method, coated on a plane formed by the anode 1 and the bipolar plate 2, constitutes the electrolyte membrane 4 of the molten carbonate fuel cell, which can be directly used for molten carbonate fuel after natural drying at room temperature Battery. The electrolyte membrane has a thickness of 0.5 mm, an average pore diameter of 0.3 μ...

Embodiment 2

[0024] Take 100 grams of 0.01-0.3 μm γ-LiAlO2 powder, add 800 grams of secondary water, and after ball milling for 12 hours, add Li with a molar ratio of 70 / 30 2 CO 3 / Na 2 CO 3 150 grams of electrolyte salt, after ball milling for 4 hours, add 15 grams of Al 2 o 3 After the fiber, continue ball milling for 2 hours and use it as a slurry for later use.

[0025] The above-mentioned slurry is coated on a plane formed by the anode 1 and the bipolar plate 2 by powder spraying method to form the electrolyte membrane 4 of the molten carbonate fuel cell. After natural drying at room temperature, it can be directly used in molten carbonate fuel cells. The electrolyte membrane has a thickness of 1 mm, an average pore diameter of 0.4 μm, and an average porosity of 60%.

Embodiment 3

[0027] Take 0.01~0.3μm α-LiAlO 2 100 grams of powder, add 500 grams of secondary water, after ball milling for 18 hours, add Li with a molar ratio of 70 / 30 2 CO 3 / Na 2 CO 3 125 grams of electrolyte salt, after ball milling for 3 hours, add 12.5 grams of Al 2 o 3 After the fiber, continue ball milling for 1.5 hours, then use it as a slurry for later use.

[0028] The above-mentioned slurry is coated on a plane formed by the anode 1 and the bipolar plate 2 by casting a membrane method to form the electrolyte membrane 4 of the molten carbonate fuel cell. After natural drying at room temperature, it can be directly For molten carbonate fuel cells. The electrolyte membrane has a thickness of 0.7 mm, an average pore diameter of 0.35 μm, and an average porosity of 55%. .

[0029] Stacking the components obtained in Example 3 including the cathode, bipolar plate, anode and electrolyte from bottom to top constitutes the electric stack of the molten carbonate fuel cell. Air an...

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Abstract

A fuses the carbonate fuel cell electrolyte membrane integrated preparation method, belongs to the field of fuel cell technology, that is as follows: use sub-micro-grade alpha-LiAlO2 powder or gamma -LiAlO2 powder as raw material, take water as solvent, after the ball grinding dispersion, add electrolyte salt, continue ball grinding mix, again add Al2O3 fiber, ball grinding mix to form a pulp containing substrate diaphragm material and the electrolyte saltm, directly spread this pulp on the double pole plate fitted with electrode, dry to obtain a fused carbonate fuel cell electrolyte membrane. As the pulp contains no dispersant, binder and plasticizer, the height of cell pile assembled under room temperature and the height of cell pile at working temperature will not change. In the course of preparation and primary operation, it dose not discharge organic solvent and waste gases.

Description

technical field [0001] The invention relates to a preparation method in the technical field of fuel cells, in particular to a preparation method for an electrolyte membrane of a molten carbonate fuel cell. Background technique [0002] Molten carbonate fuel cell is a kind of high-temperature fuel cell, which has the characteristics of high energy conversion efficiency, no noble metal catalyst, and wide range of fuel use. The traditional method of manufacturing electrolyte materials for molten carbonate fuel cells is divided into two steps: firstly, the substrate diaphragm of the electrolyte is prepared, usually with submicron α-aluminum metalithiate or γ-aluminum metalithium powder as the main The raw materials are ball-milled by adding dispersants, adhesives, plasticizers and corresponding organic solvents to form a slurry, and the slurry is formed into a film by tape-casting and spraying. [0003] After searching the literature of the prior art, it was found that Chinese ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/14H01M8/0295
CPCY02E60/526Y02E60/50Y02P70/50
Inventor 余晴春
Owner SHANGHAI JIAOTONG UNIV