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

摘要

A dense ${text{BaCe}}_{{text{0}}{text{.8}}} {text{Sm}}_{{text{0}}{text{.2}}} {text{O}}_{{text{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 μm was successfully prepared on porous anode support by suspension spray process after co-sintering at 1,400 °C for 5 h. With ${text{Nd}}_{{text{0}}{text{.7}}} {text{Sr}}_{{text{0}}{text{.3}}} {text{MnO}}_{{text{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/cm2 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/cm2 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.