In situ fabrication of high-performance Ni-GDC-nanocube core-shell anode for low-temperature solid-oxide fuel cells.

ABSTRACT: A core-shell anode consisting of nickel-gadolinium-doped-ceria (Ni-GDC) nanocubes was directly fabricated by a chemical process in a solution containing a nickel source and GDC nanocubes covered with highly reactive {001} facets. The cermet anode effectively generated a Ni metal framework even at 500?°C with the growth of the Ni spheres. Anode fabrication at such a low temperature without any sintering could insert a finely nanostructured layer close to the interface between the electrolyte and the anode. The maximum power density of the attractive anode was 97?mW?cm(-2), which is higher than that of a conventional NiO-GDC anode prepared by an aerosol process at 55?mW?cm(-2) and 600?°C, followed by sintering at 1300?°C. Furthermore, the macro- and microstructure of the Ni-GDC-nanocube anode were preserved before and after the power-generation test at 700?°C. Especially, the reactive {001} facets were stabled even after generation test, which served to reduce the activation energy for fuel oxidation successfully.

SUBMITTER: Yamamoto K 

PROVIDER: S-EPMC4663492 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature