Superior power density solid oxide fuel cells by enlarging the three-phase boundary region of a NiO-Ce0.8Gd0.2O1.9 composite anode through optimized surface structure.

摘要: In an effort to boost the power densities of solid oxide fuel cells (SOFCs) operating at intermediate temperatures (600–750 °C), novel powder synthesis methods have been studied with goal increasing three-phase boundary region anode. Porous anodes composed Ni and Ce0.8Gd0.2O1.9 (GDC) cermet are commonly in SOFCs, but cell performance is limited by their dependency on boundaries which electrochemical oxidation reaction takes place. This paper presents a remarkable improvement through significant enlargement optimization surface structure. The strategy starts premise that particles aqueous solution carry positive or negative electrical charge depending upon pH solution, can be exploited attach chelated metal ions surface, extending region. modified NiO–GDC composite resulted not only extension both electronic O2− ionic conduction pathways, also suppression grain growth anode during process fabrication. As final outcome, Ni–GDC anode-supported show far superior (1.85 W cm−2 750 °C 0.83 600 °C) H2 compared conventional (0.61 0.26 °C).