2012
DOI: 10.1016/j.jpowsour.2012.03.105
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Properties and electrochemical performance of La0.75Sr0.25Cr0.5Mn0.5O3−δ–La0.2Ce0.8O2−δ composite anodes for solid oxide fuel cells

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Cited by 25 publications
(11 citation statements)
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“…Conductive oxides have been widely reported as potential candidates for solid oxide fuel cell (SOFC) anodes owing to the fact that they are mixed ionic and electronic conductors in typical anode conditions. Some of these oxide materials, including the perovskites La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 and SrTi 0.3 Fe 0.7 O 3−δ , have exhibited decidedly low anode polarization resistance R P,A values (≤0.2 Ω·cm 2 ) ,, that are reasonably close to those of typical SOFC anode material Ni-YSZ (<0.1 Ω·cm 2 at 800 °C) . One example of a mixed conducting oxide is the perovskite (La,Sr)­(Cr,Fe)­O 3−δ , which has demonstrated substantially lower R P,A than the exclusively electronically conducting (La,Sr)­CrO 3−δ . , Recent studies on this perovskite have shown that by increasing the ratio of Fe to Cr substituted on the B-site, oxygen deficiency is increased, and the ionic conductivity is improved.…”
Section: Introductionmentioning
confidence: 88%
“…Conductive oxides have been widely reported as potential candidates for solid oxide fuel cell (SOFC) anodes owing to the fact that they are mixed ionic and electronic conductors in typical anode conditions. Some of these oxide materials, including the perovskites La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3 and SrTi 0.3 Fe 0.7 O 3−δ , have exhibited decidedly low anode polarization resistance R P,A values (≤0.2 Ω·cm 2 ) ,, that are reasonably close to those of typical SOFC anode material Ni-YSZ (<0.1 Ω·cm 2 at 800 °C) . One example of a mixed conducting oxide is the perovskite (La,Sr)­(Cr,Fe)­O 3−δ , which has demonstrated substantially lower R P,A than the exclusively electronically conducting (La,Sr)­CrO 3−δ . , Recent studies on this perovskite have shown that by increasing the ratio of Fe to Cr substituted on the B-site, oxygen deficiency is increased, and the ionic conductivity is improved.…”
Section: Introductionmentioning
confidence: 88%
“…Composites of LSCM with doped ceria show better activity, as well as increased carbon deposition. In one study, carbon deposition after exposure to dry methane for 6 h at 750 °C increased from less than 0.1 wt % in pure LSCM to 1.5 wt % in 33 wt % LSCM:67 wt % lanthanum-doped ceria . An increase in the amount of the doped ceria improved performance in fuel cell tests in methane, although above 50 wt % ceria the performance dropped, probably due to lower electronic conduction.…”
Section: Materials Design Strategies For Carbon Tolerance In Sofc Anodesmentioning
confidence: 99%
“…Interestingly, the crystallite size of the LSCM in LSCM@SDC NFs is substantially smaller than that of NFs of LSCM alone (i.e., 78.1 ± 0.8 nm; Figure S2), despite the fact that they are calcined at an identical temperature. This suggests that the grain growth of LSCM particles is physically confined by the SDC envelope, which has high thermal stability as noted earlier. , This is further supported by the SEM images of LSCM NFs and SDC NFs after calcination at 1050 °C for 4 h, which display the exacerbated grain growth in LSCM NFs in contrast to that of SDC NFs (Figure S3). The chemical composition of the partially SDC encapsulated LSCM NFs was analyzed by inductively coupled plasma mass spectroscopy (ICP-MS) (Table ).…”
Section: Resultsmentioning
confidence: 99%