The properties of BaCe_(1−x)In_(x)O_(3−δ) (x = 0.05, 0.10, 0.15, 0.20, _(0.25), 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. The dense electrolyte is formed after sintering at 1300 ℃ for 5 h ...The properties of BaCe_(1−x)In_(x)O_(3−δ) (x = 0.05, 0.10, 0.15, 0.20, _(0.25), 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. The dense electrolyte is formed after sintering at 1300 ℃ for 5 h in air. The samples with In content ≥ 25 mol% contain In_(2)O_(3) as a secondary phase. The highest total conductivity is around 5×10^(−3) S/cm for BaCe_(0.75)In_(0.25)O_(3−δ) in the wet hydrogen atmosphere at 700 ℃. After exposure to pure CO_(2) atmosphere at 700 ℃ for 5 h, the concentrations of at least 15 mol% In can completely suppress degradation of the electrolyte. The power density of Ni-BaCe_(0.75)In_(0.25)O_(3−δ)/BaCe_(0.75)In_(0.25)O_(3−δ)/LSCF-BaCe_(0.75)In_(0.25)O_(3−δ) fuel cell tested in wet hydrogen atmosphere reaches 264 mW/cm2 at 700 ℃. This result is an indication of stability and functionality of this electrolyte and its versatility in respect to type of fuel and performing environment.展开更多
基金This work was supported by the Ministry of Education,Science and Technological Development of the Republic of Serbia(Contract Nos.451-03-9/2021-14/200053 and 451-03-9/2021-14/200135).
文摘The properties of BaCe_(1−x)In_(x)O_(3−δ) (x = 0.05, 0.10, 0.15, 0.20, _(0.25), 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. The dense electrolyte is formed after sintering at 1300 ℃ for 5 h in air. The samples with In content ≥ 25 mol% contain In_(2)O_(3) as a secondary phase. The highest total conductivity is around 5×10^(−3) S/cm for BaCe_(0.75)In_(0.25)O_(3−δ) in the wet hydrogen atmosphere at 700 ℃. After exposure to pure CO_(2) atmosphere at 700 ℃ for 5 h, the concentrations of at least 15 mol% In can completely suppress degradation of the electrolyte. The power density of Ni-BaCe_(0.75)In_(0.25)O_(3−δ)/BaCe_(0.75)In_(0.25)O_(3−δ)/LSCF-BaCe_(0.75)In_(0.25)O_(3−δ) fuel cell tested in wet hydrogen atmosphere reaches 264 mW/cm2 at 700 ℃. This result is an indication of stability and functionality of this electrolyte and its versatility in respect to type of fuel and performing environment.
