The catalytic effect of impregnated (La, Sr)(Ti, Mn)O3±δ with CeO2 and Pd as potential anode materials in high temperature solid oxide fuel cells

Demonstration of high performance in a perovskite oxide supported solid oxide fuel cell based on La and Ca co-doped SrTiO3

“…anode and cathode, electrode/electrolyte interfacial resistance and current collection of silver paste. This result is consistent with what has been reported for infiltrating LST 44 , LSTM 45 and LSCM 46~48 as anodes. The cell losses are dominated by the polarization resistance of electrodes (R p ), which are represented by the distance between the high and low frequency intercepts of the curve with the abscissa.…”

Structural, thermal and electrical conductivity characteristics of Ln0.5Sr0.5Ti0.5Mn0.5O3± (Ln: La, Nd and Sm) complex perovskites as anode materials for solid oxide fuel cell

“…of processing conditions can be used for the fabrication of LSTM, NSTM and SSTM, including a dip coating technique applying a thin electrolyte film comprised of 8YSZ with a subsequent heat treatment at a high temperature. Even in this high temperature preparation method for anode substrates for SOFC it is not necessary to use a CGO91 functional layer to prevent secondary phases between 8YSZ and (LSTM4682)-8YSZ [18], there were not any kinds of chemical reaction between 8YSZ and LSTM4682 after a calcination at 1200 1C for 4 h. The comparison of the reactivity properties of LSTM4682-8YSZ [18] with the reactivity of LSTM-YSZ, NSTM-YSZ and SSTM-YSZ, obtained in our experimental results, shows the possibility of LSTM, NSTM and SSTM oxide systems to be also applied using the impregnation technique. The chemical reactivity of Ln 0.5 Sr 0.5 Ti 0.5 Mn 0.5 O 3 7 d with CGO91 was also investigated in powder mixtures prepared using the same procedures as in the composites with 8YSZ.…”

“…Therefore, Ti or Cr substitution at the B-site of the complex perovskites enhances structural stability. The catalytic effect can be improved by substituting Mn on a porous 8YSZ scaffold [17] and impregnated CeO 2 -LSTM4682 on a porous 8YSZ scaffold were stable at high temperatures ranging from 700 to 900 1C [18]. The power densities of a 20 wt% CeO 2 -LSTM composite were also measured and their values resulted in 196 and 302 mW/cm 2 at 800 and 850 1C [18].…”

X-ray photoelectron spectroscopic study of impregnated La0.4Sr0.6Ti0.8Mn0.2O3±d anode material for high temperature-operating solid oxide fuel cell

“…In a related research study [18], we also reported on the catalytic effect of the impregnated LSTM oxide system as a potential composite anode material with CeO 2 and Pd in high temperature SOFCs; the application of CeO 2 reduced both the ohmic resistance and the polarization resistance of a single cell fabricated via the tape casting process. The power density of a cell with an anode containing 20 wt% of CeO 2 , 30 wt% of YSZ and 50 wt% of LSTM was increased compared to a cell with an anode of LSTM impregnated into a porous 8YSZ scaffold.…”