Tailoring cobalt-free La 0.5 Sr 0.5 FeO 3-δ cathode with a nonmetal cation-doping strategy for high-performance proton-conducting solid oxide fuel cells

[摘要] A nonmetal doping strategy was exploited for the conventional La 0.5 Sr 0.5 FeO 3- δ (LSF) cathode, allowing high performance for proton-conducting solid oxide fuel cells (H-SOFCs). Unlike previous studies focusing on the utilization of metal oxides as dopants, phosphorus, which is a nonmetal element, was used as the cation dopant for LSF by partially replacing Fe ions to form the new La 0.5 Sr 0.5 Fe 0.9 P 0.1 O 3- δ (LSFP) compound. The H-SOFC using the LSFP cathode showed a two-fold peak power density as compared to that using the LSF cathode. Both experimental studies and first-principle calculations were used to unveil the mechanisms for the high performance of the LSFP cells.

[学科分类] 电力

[关键词] cathode;high performance;nonmetal doping;proton conductor;solid oxide fuel cell