Connector and preparation method of self-sealing flat solid oxidation fuel cell

Abstract

The invention discloses a connector of a self-sealing flat plate type solid oxygenated fuel cell and a preparation method. The connector comprises a metal connecting pole and a porous metal layer, wherein a gas passage is arranged on one side of the metal connecting pole; a groove is formed in the side, provided with the gas passage, of the metal connecting pole, and the porous metal layer is arranged in the groove. A connector and supporting metal integrated structure of the self-sealing flat plate type solid oxygenated fuel cell is prepared through a method that a shelter is finally removed through sheltering and powder metallurgy on one side of the interior of the connecting pole. A cell functional layer is prepared on the integrated structure, self-sealing of the cell can be realized, the manufacturing technique of a cell stack can be greatly simplified, the cell stack does not need the introduction of any additional sealing structure, the problem that the flat plate type solid oxygenated fuel cell is sealed is overcome, the manufacturing cost of the cell is reduced, and the commercial popularization of the cell is facilitated.

Description

Technical field

[0001] The present invention relates to the field of energy technology, in particular to a self-sealing flat solid oxide fuel cell connector and supporting metal integrated structure and a preparation method. Background technique

[0002] Solid Oxide Fuel Cell (SOFC) belongs to the third generation of fuel cell. It is a kind of all-solid chemistry that directly converts the chemical energy stored in fuel and oxidant into electrical energy at medium and high temperature. Power generation device. The main components of the solid oxide fuel cell monomer are composed of electrolyte, anode or fuel electrode, cathode or air electrode, and connecting body or bipolar plate. The working principle of the solid oxide fuel cell is the same as that of other fuel cells. In principle, it is equivalent to the "reverse" device of water electrolysis. The single cell is composed of an anode, a cathode and a solid oxide electrolyte. The anode is the place where the fuel is oxidized...

Examples

Embodiment 1

[0032] In a 10×10cm 2 A gas passage 1-2 and a 9×9×1cm are processed on the metal connector 1-1 3 In the groove, first use strontium oxide to fill the gas passage 1-2, then inject the mixture of stainless steel powder and brazing filler metal into the groove, fill and compact, braze at a temperature higher than the battery working temperature, and obtain porous after brazing Metal layer 1-3; the surface of the porous metal layer 1-3 is machined into a plane. The integrated metal connection pole is immersed in water to dissolve the strontium oxide in the gas passage. Finally, Ni / YSZ anode, YSZ electrolyte layer and LSM cathode were sequentially prepared by atmospheric plasma spraying. The test battery showed good voltage and power output.

Embodiment 2

[0034] In a 19×19cm 2 The metal connecting body 1-1 is processed with a gas passage 1-2 and a 18×18×0.8cm 3 In the groove, first use strontium oxide to fill the gas passage, and then inject the mixture of stainless steel powder and pore former into the groove, fill and compact, and sinter at a temperature higher than the battery working temperature to obtain a porous metal layer 1-3 ; The surface of the porous metal layer 1-3 is machined into a plane. The integrated connection pole is immersed in water to dissolve the strontium oxide in the gas passage. Finally, Ni / YSZ anode, YSZ electrolyte layer and LSCF cathode were sequentially prepared by atmospheric plasma spraying. The test battery showed good voltage and power output.

Embodiment 3

[0036] In a 21×21cm 2 A gas passage and a 20×20×1cm are processed on the metal connector 1-1 3 In the groove, first use strontium oxide to fill the gas passage, and then melt the mixture of stainless steel powder and pore-forming agent by the selective laser melting technology to form a porous metal layer 1-3 in the groove; the surface of the porous metal layer 1-3 is machined into one flat. The integrated connection pole is immersed in water to dissolve the strontium oxide in the gas passage. Finally, Ni / ScSZ anode, ScSZ electrolyte layer and LSCF cathode were sequentially prepared by atmospheric plasma spraying. The test battery showed good voltage and power output.

Technical field

[0001] The present invention relates to the field of energy technology, in particular to a self-sealing flat solid oxide fuel cell connector and supporting metal integrated structure and a preparation method. Background technique

[0002] Solid Oxide Fuel Cell (SOFC) belongs to the third generation of fuel cell. It is a kind of all-solid chemistry that directly converts the chemical energy stored in fuel and oxidant into electrical energy at medium and high temperature. Power generation device. The main components of the solid oxide fuel cell monomer are composed of electrolyte, anode or fuel electrode, cathode or air electrode, and connecting body or bipolar plate. The working principle of the solid oxide fuel cell is the same as that of other fuel cells. In principle, it is equivalent to the "reverse" device of water electrolysis. The single cell is composed of an anode, a cathode and a solid oxide electrolyte. The anode is the place where the fuel is oxidized...

Examples

Embodiment 1

[0032] In a 10×10cm 2 A gas passage 1-2 and a 9×9×1cm are processed on the metal connector 1-1 3 In the groove, first use strontium oxide to fill the gas passage 1-2, then inject the mixture of stainless steel powder and brazing filler metal into the groove, fill and compact, braze at a temperature higher than the battery working temperature, and obtain porous after brazing Metal layer 1-3; the surface of the porous metal layer 1-3 is machined into a plane. The integrated metal connection pole is immersed in water to dissolve the strontium oxide in the gas passage. Finally, Ni / YSZ anode, YSZ electrolyte layer and LSM cathode were sequentially prepared by atmospheric plasma spraying. The test battery showed good voltage and power output.

Embodiment 2

[0034] In a 19×19cm 2 The metal connecting body 1-1 is processed with a gas passage 1-2 and a 18×18×0.8cm 3 In the groove, first use strontium oxide to fill the gas passage, and then inject the mixture of stainless steel powder and pore former into the groove, fill and compact, and sinter at a temperature higher than the battery working temperature to obtain a porous metal layer 1-3 ; The surface of the porous metal layer 1-3 is machined into a plane. The integrated connection pole is immersed in water to dissolve the strontium oxide in the gas passage. Finally, Ni / YSZ anode, YSZ electrolyte layer and LSCF cathode were sequentially prepared by atmospheric plasma spraying. The test battery showed good voltage and power output.

Embodiment 3

[0036] In a 21×21cm 2 A gas passage and a 20×20×1cm are processed on the metal connector 1-1 3 In the groove, first use strontium oxide to fill the gas passage, and then melt the mixture of stainless steel powder and pore-forming agent by the selective laser melting technology to form a porous metal layer 1-3 in the groove; the surface of the porous metal layer 1-3 is machined into one flat. The integrated connection pole is immersed in water to dissolve the strontium oxide in the gas passage. Finally, Ni / ScSZ anode, ScSZ electrolyte layer and LSCF cathode were sequentially prepared by atmospheric plasma spraying. The test battery showed good voltage and power output.

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