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Molten carbonate fuel cell structure

A molten carbonate and fuel cell technology, applied in the direction of molten electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problems of large electrode polarization, unfavorable transmission, low battery performance, etc., and achieve improved immersion and gas barrier capabilities , reduce pollution and improve battery performance

Active Publication Date: 2015-01-14
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

Because its internal pores also form a disordered honeycomb structure, and the electrode is relatively thick, it is not conducive to the transmission of substances, and the electrode polarization is large, resulting in low battery performance.

Method used

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Experimental program
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Embodiment 1

[0022] Embodiment 1: as figure 1 As shown, the present invention includes an ordered diaphragm 1 and an ordered electrode 2 . Ordered diaphragm 1 has a straight through-hole channel structure with a pore diameter of 50-200nm and a thickness of 200-400um, and is made of ceramic material α-LiAlO 2 .

[0023] The preparation process of the ordered separator 1 is as follows: AAO with a pore size of 50nm and a thickness of 300um is used as the substrate, dipped and pulled several times in a saturated potassium carbonate solution, and then placed in an oven at 80°C for 8h. After drying, place it on a smooth ceramic plate covered with a layer of quartz sand, and place it in a muffle furnace for firing. The firing procedure is as follows:

[0024] Heating from room temperature for 10 hours to 450°C, holding at 450°C for 10 hours, heating for 6 hours to 700°C, holding at 700°C for 12 hours, then cooling down to room temperature

[0025] The surface channel scanning electron microsco...

Embodiment 2

[0027] Embodiment 2: The material of the ordered diaphragm 1 included in the present invention can also be γ-LiAlO 2 , and its preparation process is as follows:

[0028] AAO with a pore size of 100nm and a thickness of 300um was used as the substrate, dipped and pulled several times in a saturated potassium carbonate solution, and then placed in an oven at 80°C for 8h. After drying, place it on a smooth ceramic plate covered with a layer of quartz sand, and place it in a muffle furnace for firing. The firing procedure is as follows:

[0029] γ-LiAlO 2 : Heating from room temperature for 10 hours to 450°C, holding at 450°C for 10 hours, heating for 6 hours to 700°C, holding at 700°C for 12 hours, heating for 5 hours to 900°C, holding at 900°C for 4 hours, then cooling down to room temperature.

[0030] The prepared ordered diaphragm and ordered electrode assembled battery were evaluated for battery, using 62mol%Li 2 CO 3 +38mol%K 2 CO 3 As the electrolyte, the anode gas ...

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Abstract

The invention discloses a novel molten carbonate fuel cell structure which has the main characteristics of ordered separator and ordered electrode compared with conventional molten carbonate fuel cells. The molten carbonate fuel cell structure is characterized in that the employed separator and electrode both have an ordered tunnel structure, and because of the ordered tunnel structure owned by the fuel cell self, a long-time separator roasting process is not needed again in a starting process of the fuel cell, and the first starting time of the molten carbonate fuel cell is substantially reduced. Also, the ordered tunnel structures of the separator and the electrode of the fuel cell are beneficial for substance transmission of reactants and products, help to reduce mass transfer polarization, and are beneficial for improvement of cell properties.

Description

technical field [0001] The invention relates to fuel cell technology in the field of energy technology, in particular to a brand-new molten carbonate fuel cell. Background technique [0002] Molten carbonate fuel cell (MCFC) is a high-temperature fuel cell with an operating temperature of 650°C. Its reaction process is different from the heat engine process, so the energy conversion efficiency is not limited by the "Carnot cycle", and the efficiency can reach 50%. ~60%, the battery reaction product is only water, and there is no emission of pollutants. It also has the common advantages of fuel cells such as cleanliness, high efficiency, low noise, and high specific power. It is suitable for use as a distributed power station and has entered the early stage of commercialization. [0003] Traditional MCFCs generally consist of key components such as electrodes, electrolyte diaphragms, and bipolar plates. Among them, the traditional electrolyte separator must undergo long-ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/14H01M2/16H01M4/86H01M4/88
CPCH01M4/8605H01M4/8853H01M4/8867H01M8/0236H01M8/0256Y02E60/50
Inventor 周利王鹏杰刘飒邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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