3D printed Sm-doped ceria composite electrolyte membrane for low temperature solid oxide fuel cells

Three dimensional (3D) printing has attracted much more interest from the research community due to its ability to make complex structures with high resolution and simplified fabrication process. Here we constructed composited electrolyte with certain thickness for the application of low temperature of solid oxide fuel cells. The fabrication of a thin and dense Sm-doped ceria composite electrolyte layers with the thickness about 1200 μm utilizing paraffin-based slurry were investigated. To optimize the assembled cells, 1.7 wt. % glassfiber was introduced and an amazing electrochemical performance was observed. The maximum power density can reach 448 mW/cm 2 , 20% higher than the one without glassfiber and the open-circuit voltage is approximately 1.0 V at 550 °C. It is of great potential for 3D printing technology to develop low temperature solid fuel cells with designed mini-structures.