An (La,Sr)(Co,Cu)O3−δ cathode for reduced temperature SOFCs

Yasumoto, Kyoden; Inagaki, Yoshishige; Shiono, Mitsunobu; Dokiya, Masayuki

doi:10.1016/s0167-2738(02)00115-7

Cited by 48 publications

(19 citation statements)

References 3 publications

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“…The main advantages of such materials are related to an infinite theoretical permselectivity with respect to oxygen, caused by the only possible mechanism of oxygen transport, that is, oxygen ion hopping between neighboring vacant sites in the crystal lattice. Considerable attention has been attracted by these materials as possible candidates applied in oxygen separation,1–7 solid oxide fuel cells,8–11 and membrane reactors 12–19…”

Section: Introductionmentioning

confidence: 99%

Effect of pH on synthesis and properties of perovskite oxide via a citrate process

Zhou

Jin

et al. 2005

AIChE Journal

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O 3-␦ (LSCF) perovskite-type oxides were synthesized using a modified citrate process under various pH conditions (pH ϭ1, 3, 5, 7, and 9, respectively). The effect of pH on the chelate process, crystal development, morphology, and oxygen permeability of LSCF oxides were investigated. FT-IR analysis showed that the chelate processes for pH ϭ 1 and 3 were different from those for pH ϭ 5, 7, and 9. (pH ϭ 5, 7, and 9) in the range of 1073-1123K. This study indicated that properties such as crystallinity and oxygen permeability of LSCF oxide could be tailored by controlling the pH values in the synthesis process. XRD and SEM observations revealed that the crystal formation and morphology of LSCF oxides were dependent on the precursors with different pH conditions. The LSCF membranes derived from the precursors with lower pH values (pH ϭ 1 and 3) exhibited larger apparent activation energy for oxygen permeation than the other samples

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Section: Introductionmentioning

confidence: 99%

Effect of pH on synthesis and properties of perovskite oxide via a citrate process

Zhou

Jin

et al. 2005

AIChE Journal

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“…It has been reported that TEC values can be adjusted by B-site substitution on LaCoO3 [65], LaFeO3 [66], La1-xSrxFeO3-δ [58] and La1-xSrxCoO3-δ [67]. Previous studies suggested that B-site substitution also affects the TEC of LSCF, which may have relationship with the formation of oxygen vacancies [7].…”

Section: +mentioning

confidence: 99%

B-Site Metal (Pd, Pt, Ag, Cu, Zn, Ni) Promoted La1−xSrxCo1−yFeyO3–δ Perovskite Oxides as Cathodes for IT-SOFCs

Guo

Puleo

et al. 2015

Catalysts

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Perovskite oxides La1−xSrxCo1−yFeyO3-δ (LSCF) have been extensively investigated and developed as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs) due to mixed ionic-electronic conductivity and high electrooxygen reduction activity for oxygen reduction. Recent literature investigations show that cathode performances can be improved by metal surface modification or B-site substitution on LSCF. Although the specific reaction mechanism needs to be further investigated, the promoting effect of metal species in enhancing oxygen surface exchange and oxygen bulk diffusion is well recognized. To our knowledge, no previous reviews dealing with the effect of metal promotion on the cathodic performances of LSCF materials have been reported. In the present review, recent progresses on metal (Pd, Pt, Ag, Cu, Zn, Ni) promotion of LSCF are discussed focusing on two main aspects, the different synthesis approaches used (infiltration, deposition, solid state reaction, one pot citrate method) and the effects of metal promotion on structural properties, oxygen vacancies content and cathodic performances. The novelty of the work lies in the fact that the metal promotion at the B-site is discussed in detail, pointing at the effects produced by two different approaches, the LSCF surface modification by the metal or the metal ion substitution at the B-site of the perovskite. Moreover, for the first time in a review article, the importance of the combined effects of oxygen dissociation rate and interfacial oxygen transfer rate between the metal phase and the cathode phase is addressed for OPEN ACCESSCatalysts 2015, 5 367 metal-promoted LSCF and compared with the un-promoted oxides. Perspectives on new research directions are shortly given in the conclusion.

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“…In addition to LSCF perovskites, several other La-containing compositions have been developed using A or B-site dopants such as Ba, 58,59 Cu, 60–67 Ni, 68,69 Mo, 70 and Ca 71,72 demonstrating a range of properties summarized in Table 2. A series of La 1− x Ba x Co 0.2 Fe 0.8 O 3− δ (LBCF) compositions have been investigated for application in IT-SOFC cathodes showing lower electrical conductivities than their LSCF counterparts, 58,59 with a maximum value of 100 S cm −1 in the temperature range of RT-1000 °C for La 0.6 Ba 0.4 Co 0.2 Fe 0.8 O 3− δ .…”

Section: Perovskite-type Structure Sofc Cathodesmentioning

confidence: 99%

“…58 However, the main advantage of this family is their high resistance to Cr poisoning and good polarization performance stability compared to conventional LSM and LSCF cathodes. 73 Cu-doped compositions such as La 0.6 Sr 0.4 Co 1− y Cu y O 3− δ , 60 La 1− y Sr y Mn 1− x Cu x O 3− δ , 61,64 and La x Sr 1− x Fe 1− y Cu y O 3− δ 62,63,65,66,74 have been investigated. Specifically, Co-free compositions with Cu have attracted much attention due to the decreased cost and TEC and sufficient catalytic activity.…”

Section: Perovskite-type Structure Sofc Cathodesmentioning

confidence: 99%

“…Hence, Mn, Fe, Ni, and Cu have been partially substituted at the Co site in order to reduce the TEC values. 4,60,257–260 These substitutions result in compositions that exhibit lower TEC values but the electrochemical performances also decrease when compared to parent Co-based compositions. Hence, researchers have investigated other crystal systems possessing matching TEC values with other cell components.…”

Section: Other Crystal Structures For It-sofc Cathodesmentioning

confidence: 99%

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Recent advances, practical challenges, and perspectives of intermediate temperature solid oxide fuel cell cathodes

et al. 2022

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An (La,Sr)(Co,Cu)O3−δ cathode for reduced temperature SOFCs

Cited by 48 publications

References 3 publications

Effect of pH on synthesis and properties of perovskite oxide via a citrate process

Effect of pH on synthesis and properties of perovskite oxide via a citrate process

B-Site Metal (Pd, Pt, Ag, Cu, Zn, Ni) Promoted La1−xSrxCo1−yFeyO3–δ Perovskite Oxides as Cathodes for IT-SOFCs

Recent advances, practical challenges, and perspectives of intermediate temperature solid oxide fuel cell cathodes

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