Direct ammonia proton-conducting solid oxide fuel cells prepared by a modified suspension spray

摘要

A dense BaCe_(0.8)Sm_(0.2)O_(3-delta)(BCSO)membrane was fabricated by a modified suspension spraying on porous NiO-BCSO anode support.In the process,the suspension was directly prepared by ball-milling the BaCO3,CeO2,and Sm2O3 powders in ethanol.A dense and uniform electrolyte layer in the thickness of 10 mu m was successfully prepared on porous anode support by suspension spray process after co-sintering at 1,400 °C for 5 h.With Nd_(0.7)Sr_(0.3)MnO_(3-sigma)(NSMO)cathode,a single cell was assembled and tested with hydrogen and ammonia as fuels,respectively.The hydrogen-fueled cell exhibits 1.01 V for open circuit voltage(OCV)and 560 mW/cm~2 for peak power density at 700 °C.In comparison,the cell in ammonia displays a similar performance(1.02 V for OCV and 530 mW/cm~2 for output),which indicates the liquid ammonia is a promising substitute for hydrogen.Moreover,the fuel cell displays good interface contacts.To sum up,ammonia-fueled solid oxide fuel cells prepared by this simple suspension spray is an alternative way to promote the commercialization.