Production of multifunctional gas-phase depositer and solid oxide fuel single cell

Abstract

The present invention discloses a multifunctional vapor deposition device and the preparation process of solid oxide fuel cell. The invention features of the multifunctional vapor deposition device and different functional ceramic film. The multifunctional vapor deposition device integrates the functions of solid source chemical vapor deposition of beta-diketone-metal complex, aerosol chemical vapor deposition of the source solution, plasma enhancing, ultraviolet source activation and heating assisted by heat light source. The functional ceramic films use prepared porous supporting cathode or anode as lining, and prepare unit cells orderly in situ at 600-1000DEG C via vapor deposition technology or the combination of multiple technologies. The invention avoids distortion, cracks or residual stress occurring in multilayer co-sintering at high temperature. The layers of unit have easily controllable composition and microstructure. The source materials is low corrosiveness and easy to prepare, has a rich resource. The invention can be applied to the preparation of tubular solid oxide cell or planar cell.

Description

Technical field: [0001] The invention belongs to the technical field of fuel cells, in particular to a multifunctional vapor deposition device and a method for preparing ceramic membranes of solid oxide fuel single cells (PEN) with different materials and microstructures at one time by using the device. Background technique: [0002] According to the Netherlands "Solid Ionics" magazine (Solid State Ionics, vol.152-453 (2002) 373-381, vol.175 (2004) 171-176, vol.176 (2005) 451-456), the current solid oxidation The preparation technologies of single fuel cell mainly include tape casting, calendering, screen sprinting, vacuum slip coating, spraying, etc. method (wetpowder spraying) and plasma spraying (plasma spraying)) and so on. Using these technologies, generally only a certain layer (electrolyte, cathode, anode, or electrode active layer) of a single cell of a solid oxide fuel cell can be prepared at one time; the preparation of a single cell requires multiple "room temper...

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Problems solved by technology

Using these technologies, generally only a certain layer (electrolyte, cathode, anode, or electrode active layer) of a single cell of a solid oxide fuel cell can be prepared at one time; the preparation of a single cell requires multiple "room temperature preparation-high temperature sintering-cooling" At the same time, to complete the preparation of a single cell, at least one multi-layer high-temperature (1400-1500 ° C) co-firing is required; therefore, there are many problems: 1) Due to the different electrochemical functions of the ceramic film layers of each structural unit of the single cell, The materials used and the requirements for the microstructure are different, and it is difficult for multilayer high-temperature co-firing to meet the different requirements for the microstructure of each ceramic film layer of the single cell; 2) Due to the different materials of the ceramic film layers of the structural units of the single cell, the sintering shrink The behavior is different, and it is difficult to shrink or expand synchronously when the layers are co-fired. Therefore, it is easy to generate thermomechanical stress, resulting in sintering deformation, rupture or internal micro-cracks of the battery; 3) Due to the need for multi-layer high-temperature co-firing, generally only The battery design with anode support is limited, and the structural design of the single battery is limited; 4) Multiple preparations are labor-intensive and time-consuming, multiple multi-layer high-temperature co-firing, high energy consumption costs

[0003] Journal of the American Electrochemical Society (U.B.Pol and S.C.Singhal, J.Electrochem.Soc., 137 (9) (1990) 2937) reported that a solid oxide fuel cell was prepared using electrochemical vapor deposition (electrochemical vapor deposition, EVD) technology The dense electrolyte layer, but due to the use of highly corrosive metal chloride as the source material, and the deposition temperature is as high as 1200 ° C, the equipment investment cost is high; in addition, because the preparation of the dense electrolyte layer of this technology is based on electrochemical principles , generally only applicable to the preparation of tubular solid oxide fuel cells

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