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Plate type solid oxide fuel cell cathode flexible contact material and battery pile structure

A fuel cell cathode and solid oxide technology, which is applied in the direction of solid electrolyte fuel cells, fuel cell groups, fuel cell components, etc., can solve problems such as easy blockage of gas channels, difficult control of sintering state, and irregular distribution of pores. Achieve the effects of improving reliability and operating life, ensuring long-term stability, and regular microstructure

Inactive Publication Date: 2008-11-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of connection is still a rigid structure, and there are obvious disadvantages: first, the amount of application is not easy to control, if it is too small, the connection effect will be poor, and it will be easily absorbed by the porous cathode, and if it is too much, it will easily block the gas channel; second, the sintering state is not easy to control, If the temperature is low, the degree of sintering will be low and the electrical connectivity will be poor, while if the temperature is too high, the structure will be too dense and gas circulation will be hindered
Its disadvantages are: the deformation ability comes from the metal material, which belongs to an elastic rather than flexible contact layer, so there are fewer contact points; the densification of the coating is difficult to achieve, and the metal wire will be oxidized in an oxidizing atmosphere, and quickly lose its elasticity and conductivity ; The composition of the metal wire matrix will chemically react with the surface coating material under long-term high temperature conditions, thereby changing their chemical composition and reducing the electrical conductivity and mechanical properties; the current connection material formed by randomly agglomerated metal wires has irregular distribution of pores. The current collection point is uneven, which is not conducive to reducing the resistance and also affects the service life of the material

Method used

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  • Plate type solid oxide fuel cell cathode flexible contact material and battery pile structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: the composition is Mn 1.5 co 1.5 o 4 , a cloth with a thickness of 0.5cm, placed on the La of the plate-shaped SOFC cell stack 0.6 Sr 0.4 FeO 3 Between the cathode and the metal connection electrode, it is used as a flexible contact layer on the cathode side. The plate-type SOFC cell stack is composed of overlapping units consisting of stainless steel connecting pole, anode nickel foam contact layer, Ni-YSZ anode, YSZ electrolyte, cathode, flexible cathode contact layer, and stainless steel connecting pole. The measurement shows that the specific resistance of the contact layer in the battery stack at 750°C is ASR=0.01Ω·cm 2 .

Embodiment 2

[0016] Embodiment 2: the composition is La 0.5 Sr 0.5 MnO 3 , a cloth with a thickness of 0.5cm, placed on the La of the plate-shaped SOFC cell stack 0.6 Sr 0.4 MnO 3 Between the cathode and the metal connection electrode, it is used as a flexible contact layer on the cathode side. The plate-type SOFC cell stack is composed of overlapping units consisting of stainless steel connecting pole, anode nickel foam contact layer, Ni-YSZ anode, YSZ electrolyte, cathode, flexible cathode contact layer, and stainless steel connecting pole. The measurement shows that the specific resistance ASR of the contact layer in the battery stack at 800°C is 0.013Ω·cm 2 .

Embodiment 3

[0017] Embodiment 3: the composition is La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 , a cloth with a thickness of 0.4cm, placed on the La of the plate-shaped SOFC cell stack 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 Between the cathode and the metal connection electrode, it is used as a flexible contact layer on the cathode side. The plate-type SOFC cell stack is composed of overlapping units consisting of stainless steel connecting pole, anode nickel foam contact layer, Ni-YSZ anode, YSZ electrolyte, cathode, flexible cathode contact layer, and stainless steel connecting pole. The measurement shows that the specific resistance of the contact layer in the battery stack at 750°C is ASR=0.01Ω·cm 2 .

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Abstract

This invention relates to a cathode flexible contact material of a panel solid oxide fuel cell (SOFC) stack structure and a cell stack structure, in which, the composition of the cathode flexible contact material includes: CaTi ore, spinel, or ferrite, cobaltate, nickelate, chromate, manganate or galliumate of inverse spinel mine in the structure of cloth, felt, net or foam, the cell stack structure is made up of overlapped cell units composed of a connection pole, anode Ni net or a foam Ni contact layer, anode, electrolyte, cathode and cathode flexible contact layer.

Description

technical field [0001] The invention relates to a plate-type solid oxide fuel cell cathode flexible contact material and a plate-type solid oxide fuel cell stack structure using the cathode flexible contact material, belonging to the technical field of fuel cells. Background technique [0002] Solid oxide fuel cell (SOFC) is an all-solid-state energy conversion device, which directly converts the potential chemical energy of the fuel into electrical energy, and has a high energy utilization rate. It is a power generation technology under development. The SOFC unit cell includes three parts: anode, electrolyte membrane and cathode. Hydrogen first loses electrons under the catalysis of the anode, and the electrons flow through the external circuit through the load to do work, and then reach the cathode to be captured by oxygen, and the oxygen gets electrons and becomes oxygen ions, and the oxygen ions pass through the electrolyte membrane to reach the anode and meet hydrogen i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M4/86H01M2/20C04B35/00H01M8/10H01M8/24
CPCY02E60/12Y02E60/521Y02E60/50
Inventor 谢朝晖朱庆山黄文来
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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