Preparation method of rare earth, calcium and nickel co-doped cerium dioxide/cerium dioxide film

Abstract

The invention discloses a preparation method of a rare earth, calcium and nickel co-doped cerium dioxide / cerium dioxide film. The preparation method includes the specific steps: (1) mixing soluble salt, calcium salt, nickel salt, rare earth salt, water and ethylene glycol to obtain electrolyte; (2) taking a cerium sheet as an anode, pasting one surface of the cerium sheet with a transparent adhesive tape, taking a platinum sheet or lead sheet as a cathode, and placing the anode and the cathode into the electrolyte for anodic oxidation to obtain an anodic oxidation part after anodic oxidation; (3) roasting the anodic oxidation part in a muffle furnace to obtain a film with the rare earth, calcium and nickel co-doped cerium dioxide film on one surface and cerium dioxide film on the other surface, wherein the rare earth, calcium and nickel co-doped cerium dioxide film with a compact lower surface is provided with a plurality of nano straight holes. The preparation method is simple, the length of each nano straight hole in the surface of the obtained film is 16-109 micrometers, and rare earth, calcium and nickel contents are 4.5-28wt%, 2-20wt% and 1.1-21wt%.

Description

technical field [0001] The invention relates to a preparation method of a rare earth, calcium and nickel co-doped ceria / ceria film, belonging to the technical field of film preparation. Background technique [0002] Doped ceria can be used as an electrolyte for solid oxide fuel cells due to its high oxygen storage capacity and oxygen ion conductivity. In the preparation of the anode of the solid oxide fuel cell, the catalyst, electrolyte powder, pore-forming agent, etc. are usually mixed uniformly, and the mixed powder is deposited on the surface of the electrolyte, and then sintered at a temperature above 1000°C. The problems introduced by such a high temperature are: the surface area of ​​the electrode is reduced, and the electrode material particles grow up, thereby reducing the three-phase interface area; some electrodes and electrolytes are prone to phase reactions at high temperatures; some anode materials and electrolytes have different thermal expansion coefficients ...

AI Technical Summary

Problems solved by technology

The problems introduced by such a high temperature are: the surface area of ​​the electrode is reduced, and the electrode material particles grow up, thereby reducing the three-phase interface area; some electrodes and electrolytes are prone to phase reactions at high temperatures; some anode materials and electrolytes have different thermal expansion coefficients If the electrode is directly loaded on the electrolyte, it is easy to cause the interface between the electrode and the electrolyte to peel off during long-term operation, resulting in attenuation of battery performance