Current collection layer structure of solid oxide fuel cell

Abstract

The invention discloses a current collection layer structure of a solid oxide fuel cell. The current collection layer structure comprises a current collection layer skeleton structure and a current collection layer active structure, wherein the current collection layer active structure is infiltrated inside the current collection layer skeleton structure, and the current collection layer active structure consists of nano particles. The current collection layer structure of the solid oxide fuel cell is simple in structure, the problem that the traditional metal current collection layer is expensive in price can be solved, the stripping problem caused by mismatching of heat expansion coefficients between the ceramic current collection layer and the cell can be solved, the preparation cost is low, and the current collection layer structure is easy to realize.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a structure of a solid oxide fuel cell current collection layer. Background technique [0002] Solid oxide fuel cell (SOFC) is an efficient all-solid-state electrochemical energy conversion device that directly converts chemical energy into electrical energy. In order to transfer the electricity generated by SOFC to the load or external circuit, it is necessary to reduce the loss of electric energy during transmission. The usual method is to prepare a current collection layer with high conductivity on both sides of the electrode of SOFC to reduce the loss. The traditional anode side current collection layer uses Ni felt, while the cathode side current collection layer can use flexible precious metals such as silver mesh. However, among all fuel cells, SOFC has the highest operating temperature and is a high-temperature fuel cell, so the silver mesh will suffer a certain loss when it is...

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Problems solved by technology

However, since the current collector layer and the battery have not experienced high-temperature sintering, the current collector layer will inevitably pulverize, fall off, and become poorly bonded to the battery during the long-term operation of the battery, resulting in a decline in battery performance.

In addition, the commonly used method of preparing the current collection layer is to prepare high-conductivity ceramic materials such as nickel oxide or doped lanthanum cobaltate powder into a slurry, which is screen printed on the anode or cathode side of the battery, but the current collector The thermal expansion coefficient of the material often does not match that of the battery, and the performance of the battery will degrade due to poor contact between the current collector and the battery during thermal cycling

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