A method and an electrode produced by infiltration
A technology of electrodes and electrocatalysts, applied in battery electrodes, circuits, fuel cells, etc., can solve the problems of unimproved oxygen electrode performance, long-term stability, and high temperature resistance treatment, and achieve enhanced electronic conductivity and catalytic activity, low electrode Effect of polarization resistance and high performance
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example 1
[0103] By weighing CeO 2 (99%, Johnson Matthey, Germany), Gd 2 O 3 (99.9%, Alfa Aessa, Germany), Pr 6 O 11 (99.9%, Alfa Aesar, Germany) The precise amount of powder, through the traditional route that is solid state reaction to prepare Ce 0.9 Gd 0.09 Pr 0.01 O 2-δ (CGPO-sss). The powder was mixed by ball milling with ethanol for 48 hours. The synthesized mixture was dried and calcined in air at a heating and cooling rate of 2 degrees Celsius per minute at 1400 degrees Celsius. The synthesized powder was ball milled in ethanol for 45 hours to break up large pieces and obtain a more uniform particle size distribution. By adding the corresponding powder to the corresponding weight ratio of 50:9:2:1:0.075 terpineol (Aldrich, Aldrich), dispersant (Solsperse 3000M, Leubrizol), phthalate The butyl ester (Merck) and ethyl cellulose (Fluoluka) are mixed to prepare CGPO screen printing ink. By screen printing CGPO ink to 5×5cm 2 , Dense 290μm thick Ce 0.9 Gd 0.1 O 1.95 (CGO) (KERAFOL) ...
example 2
[0108] Another batch of samples was tested. This time the CGO backbone sintered at 1250 degrees Celsius and with and without praseodymium are used. In addition, the concentration of praseodymium (0.0132) is significantly lower than the first case. As in the first case, the CGO backbone with praseodymium was also preheated at 1000°C before LSC infiltration. Two samples were infiltrated with LSC six times and baked at different temperatures. R for two samples p Increase with increasing LSC baking temperature. However, from the samples with praseodymium, in T max = 900 degrees Celsius, R p The increase in is not significant compared with the sample without praseodymium. This result is also seen in the discussion above. About R s , The sample without praseodymium shows an increase in R with increasing LSC baking temperature s , And the sample with praseodymium shows R s almost no change at all.
[0109] When compared to electrodes produced according to the method of the presen...
example 3
[0111] The method of the present invention can also be applied to the manufacture of fuel electrodes, such as anodes in solid oxide fuel cells. The CGO backbone can be manufactured as described in Example 1 and Example 2. 1 mole of WO can then be used 3 The precursor body (such as ammonium metatungstate) penetrates the backbone. The permeable structure can be heated to 650 degrees Celsius in air to decompose the precursor and form WO 3 . A final heating greater than or equal to 1000 degrees Celsius may be performed to diffuse tungsten into the CGO particles. This modified backbone can then be infiltrated with an electrocatalyst such as a Ni-CGO mixture.
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