Al-doped La0.5Sr0.5MnO3 as oxide anode for solid oxide fuel cells using dry C3H8 fuel

Increased Anodic Performance of La0.5Sr0.5Mn0.9Al0.1O3by Doping with Co for Solid Oxide Fuel Cells Using Dry C3H8Fuel

“…The stability of LSM55 in reducing atmosphere is increased by doping Al for the Mn site due to the stability of trivalent Al 3+ oxidation state. 21 However, incorporation of another transition metal like Co may change the phase stability of LSM55. Figure 4 shows the XRD pattern of LSMAC72 (x = 0.2) sample after reduction in H 2 at 1273 K. While decomposition to La 2 MnO 4 and Sr 2 MnO 4 is observed, the main phase of LSMAC72 is still LaMnO 3 perovskite and considering the high intensity peak, the conductivity is mainly influenced by the reduced state of LaMnO 3 phase.…”

“…20 We have demonstrated that stability of LaMnO 3 perovskite phase can be increased by partial substitution of Mn with stable trivalent ion of Al 3+ (LSMA). 21 As a result, reasonable maximum power density of 0.2 W/cm 2 was achieved at 1173 K when dry C 3 H 8 was used as fuel and no coke formation was confirmed. Among the examined composition, it was found that La 0.5 Sr 0.5 Mn 0.6 Al 0.4 O 3 shows the highest power density and almost theoretical open circuit potential against C 3 H 8 oxidation was achieved.…”

Anodic Performance of La0.5Sr0.5Mn0.9Al0.1O3Perovskite Oxide for Solid Oxide Fuel Cells Using Dry C3H8Fuel

“…Among the dopant, it was found that substitution of Al is effective for increasing stability of LaMnO 3 oxide and reasonable power density was exhibited when dry C 3 H 8 was used for fuel. (11,12) Experimental La 0.5 Sr 0.5 MnO 3 (LSM55) and B-site doped La 0.5 Sr 0.5 Mn 0.9 A 0.1 O 3 (A: Ni, Co, Fe, Ce, Cu, Sc, In, Sb, Al, Ga) were synthesized by using sol-gel combustion method of La(NO 3 ) 3 .6H 2 O, SrNO 3 , Mn(NO 3 ) 3 .6H 2 O and the corresponding metal nitrates. Citric acid was added as chelating agent.…”