Process for preparing film slurry for rotary coating
A slurry and film technology, applied in the field of slurry spin coating preparation of solid oxide fuel cell electrolyte film, can solve the problems of long time, high cost and high raw material cost
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specific Embodiment approach 1
[0007] Embodiment 1: This embodiment includes the following five steps in turn: a. preparation of electrode support body; b. preparation of binder: dissolve ethyl cellulose in terpineol to make binder, ethyl cellulose Cellulose accounts for 1 to 15% of the total mass of the binder, and the dissolution temperature is 25 to 100°C; c. Preparation of electrolyte slurry: the electrolyte material and binder are mixed to form an electrolyte slurry, wherein the electrolyte material accounts for 5% to 50% of the total mass of the material; d. Prepare the electrolyte film base body with the slurry spin coating method: spin coating: place the electrode support on the glue homogenizer, and place a drop of electrolyte slurry in the middle, at 1 ~ 10krpm Keep the rotation speed for 10 seconds to 5 minutes to obtain a layer of electrolyte film; drying: dry at 50-600°C and keep it for 1-60 minutes; repeat the above spin coating-drying process to obtain an electrolyte film with a thickness of 2...
specific Embodiment approach 2
[0008] Specific implementation mode two: the specific operation process of this embodiment mode is as follows in sequence:
[0009] a, the preparation of the anode: prepare the NiO micropowder in the range of 5~100nm with the precipitation method; Weigh the NiO powder and YSZ (8mol% Y 2 o 3 Doped ZrO 2 ) powder, wherein the mass of NiO accounts for 30 to 70% of the total mass, using absolute ethanol as a medium, mixing and ball milling with a planetary ball mill for 2 to 30 hours, and then adding 0 to 50% of the previous mixture mass to make holes agent, and then mixed and ball-milled for 2 hours to obtain the anode powder; the pore-forming agent is flour, activated carbon, starch or graphite powder. Weigh 0.10-0.35g of dried anode powder, press it into a green body with a diameter of 13mm under a pressure of 10-800MPa, and calcinate at 900°C-1400°C for 1-5 hours to form a NiO-YSZ composite anode support;
[0010] b. Preparation of binder: dissolve ethyl cellulose in terpin...
specific Embodiment approach 3
[0015] Embodiment 3: In this embodiment, the SDC thin film is prepared on the NiO-SDC anode by the slurry spin coating method. The difference from the second embodiment is that in the preparation of the anode in step a, Sm is prepared by the glycine-nitrate method 0.2 Ce 0.8 o 1.9 (SDC) electrolyte, and calcined at 800° C. for 2 hours to prepare electrolyte micropowder with a particle size ranging from 10 to 100 nm. The SDC electrolyte is replaced by the YSZ electrolyte, and the NiO-SDC anode can be obtained according to step a of the first embodiment. In other steps, the YSZ electrolyte was replaced by SDC, and the SDC slurry was spin-coated on the NiO-SDC anode. Others are the same as the first embodiment.
[0016] The SDC in this embodiment can also be replaced by cerium oxide doped with other alkaline earth metals and / or rare earth elements, and the purpose of the invention can also be achieved, wherein the alkaline earth metals are one or more of Ca, Sr, Ba, and the r...
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Abstract
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