Ce0.8Sm0.2O2 Sol-gel Modification on La0.8Sr0.2Mn0.8Cu0.2O3 Cathode for Intermediate Temperature Solid Oxide Fuel Cell
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초록
To increase the performance of solid oxide fuel cell operating at intermediate temperature (600oC~800oC), Sm0.2Ce0.8O2 (SDC) thin layer was applied to the La0.8Sr0.2Mn0.8Cu0.2O3 (LSMCu) cathode by sol-gel coating method. The SDC was employed as a diffusion barrier layer on the yttria-stabilized zirconia(YSZ) to prevent the interlayer by-product formation of SrZrO3 or La2Zr2O7. The by-products were hardly formed at the electrolyte-cathode interlayer resulting to reduce the cathode polarization resistance. Moreover, SDC thin film was coated on the cathode pore wall surface to extend the triple phase boundary (TPB) area.
Abstract
To increase the performance of solid oxide fuel cell operating at intermediate temperature (600oC~800oC), Sm0.2Ce0.8O2 (SDC) thin layer was applied to the La0.8Sr0.2Mn0.8Cu0.2O3 (LSMCu) cathode by sol-gel coating method. The SDC was employed as a diffusion barrier layer on the yttria-stabilized zirconia(YSZ) to prevent the interlayer by-product formation of SrZrO3 or La2Zr2O7. The by-products were hardly formed at the electrolyte-cathode interlayer resulting to reduce the cathode polarization resistance. Moreover, SDC thin film was coated on the cathode pore wall surface to extend the triple phase boundary (TPB) area.
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