Solid oxide fuel cell with symmetrical electrodes, and preparation method and application thereof
A solid oxide and fuel cell technology, used in solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problems of low catalytic activity and long preparation period of impregnated electrodes, and achieve improved catalytic activity, short preparation period, The effect of eliminating carbon deposits
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[0048] Example 1
[0049] a) Preparation of porous electrolyte | dense electrolyte | porous electrolyte skeleton structure
[0050] To La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 (LSGM) Add 30g of electrolyte powder to the solvent absolute ethanol, 4g each of methyl ethyl ketone, 5g of dispersant triethanolamine and 1g of acrylic copolymer, 5g of binder epoxy resin and 4g of plasticizer polyethylene glycol; after mixing A uniform and stable slurry is obtained by ball milling, the slurry is vacuum degassed, the air in the slurry is removed, and the slurry is cast to form a compact electrolyte layer green body;
[0051] To 30g of LSGM electrolyte powder, add 4g each of solvent absolute ethanol and methyl ethyl ketone, 5g triethanolamine as dispersant and 1g acrylic copolymer, 5g as binder epoxy resin, 20g porogen ammonium oxalate and plasticizer polyethylene. Diol 4g; after mixing, ball milling to obtain a uniform and stable slurry, vacuum degassing the slurry, removing air in the slurry, and cas...
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[0065] Example 2
[0066] The preparation process is the same as in Example 1, except that the electrolyte material is replaced with YSZ (doped 8wt% Y 2 O 3 ZrO 2 ). The porosity of the porous YSZ layer is about 55%, and the thickness of the dense YSZ layer is about 30 μm. The impregnated SFMO accounts for about 25% of the pore volume fraction of the porous layer.
[0067] The test conditions are the same as in Example 1. When hydrogen is used as the fuel, the open circuit voltage of the single cell is between 1.021V and 1.07V in the range of 600~800℃, and the maximum output power at 600, 650, 700, 750, 800℃ respectively 78, 130, 193, 250, 313mW·cm -2 between. When propane is used as fuel, the open circuit voltage of a single cell is between 0.9V and 0.88V in the range of 750~800℃, and the maximum output power at 750 and 800℃ is 74 and 155mW·cm respectively. -2 between.
Example Embodiment
[0068] Example 3
[0069] The preparation process is the same as in Example 1, except that the electrolyte material is replaced with ScSZ (doped 10wt%Sc 2 O 3 ZrO 2 ), the electrocatalytic film electrode material is replaced with LaSr 2 Fe 2 CrO 9 .
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