SOFC battery and preparation method thereof

Abstract

The invention discloses an SOFC (Solid Oxide Fuel Cell) battery which comprises a filter layer, a functional layer and a support body for connecting the filter layer and the functional layer, the functional layer comprises an anode functional layer, an electrolyte layer and a cathode functional layer; the anode functional layer and the cathode functional layer are connected through the electrolyte layer; the anode functional layer is connected with the support body; when the SOFC battery works, fuel gas is in contact with the filter layer and then is in contact with the support body; the porosity of the support body is 25-35%, and the strength of the support body is greater than 20MPa; the invention further discloses a preparation method of the SOFC. According to the solid oxide fuel cell, interception of S elements in fuel gas in the filter layer and pretreatment of the carbon deposition problem are achieved through the filter layer by means of the temperature of the SOFC during working, the fuel gas guiding efficiency of the supporting body is not reduced, the poisoning and carbon deposition problems of sulfide of the supporting body and the anode functional layer are effectively solved, and the manufacturing cost of the cell is not obviously increased.

Description

technical field [0001] The invention relates to the field of solid oxide fuel cells, in particular to the field of gas filtration, purification and reforming in solid oxide fuel cells. Background technique [0002] Solid oxide fuel cell (SOFC) is an energy conversion device that directly converts chemical energy in fuel into electrical energy. Solid oxide fuel cells generally consist of a support body, a functional layer, a support body, or a functional layer and a metal connector. It can be used in portable power supply, combined heat and power and large-scale power generation systems. It has high efficiency, no pollution, a wide range of fuel choices and broad application prospects. It is one of the fundamental core technologies of the future hydrogen energy industry and power industry. . The efficient and rapid conversion of fuel and electricity can be achieved through SOFC, which is an important low-carbon energy technology. [0003] In the process of commercialization...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of poisoning and carbon deposition of sulfide in SOFC fuel cell support body and anode functional layer without obviously increasing the processing cost; a kind of SOFC battery is provided, including filter layer, functional layer, and connection The support of the filter layer and functional layer; the functional layer includes an anode functional layer, an electrolyte layer, and a cathode functional layer; the anode functional layer and the cathode functional layer are connected through an electrolyte layer; the anode functional layer is connected to the support ; When the SOFC battery is working, the gas contacts the filter layer and then contacts the support body; the porosity of the support body is 25-35%, and the support body strength is greater than 20Mpa; and a preparation method of the SOFC battery ; Use the temperature of the SOFC battery to intercept the S element in the filter layer through the filter layer, through the filter layer structure, increase the water vapor content in the filter layer structure, inhibit the carbon deposition reaction, and at the same time, the generated A small amount of carbon reacts with Ni to produce NiC, and the carbon deposition reaction is advanced to the filter layer, that is, outside the support body and the anode functional layer, effectively protecting the support body and the anode functional layer. This invention does not reduce the gas conduction efficiency of the support body , and effectively reduce the poisoning and carbon deposition of the sulfide on the support and the anode functional layer, without significantly increasing the production cost of the battery