Development of Double‐Perovskite Compounds as Cathode Materials for Low‐Temperature Solid Oxide Fuel Cells

Yoo, Seonyoung; Jun, Areum; Ju, Young Wan; Odkhuu, Dorj; Hyodo, Junji; Jeong, Hu Young; Park, Noejung; Shin, Jeeyoung; Ishihara, Tatsumi; Kim, Guntae

doi:10.1002/anie.201407006

Cited by 190 publications

(111 citation statements)

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“…The SCNT cathode outperforms the other reported cathode compositions at below 500 °C. (Supplementary Table 1)710111218404142 For example, the electroactivity of SCNT cathode is nearly twice that of the highly active SrSc 0.175 Nb 0.025 Co 0.8 O 3−δ at 500 °C (ref. 10), and is also higher than that of Ba 0.9 Co 0.7 Fe 0.2 Mo 0.1 O 3−δ at 450 °C (ref.…”

Section: Resultsmentioning

confidence: 99%

“…However, the low operating temperature (450-600 °C) typically leads to sluggish kinetics of the oxygen reduction reaction (ORR) at the cathode, with this being a major limitation to LT-SOFC performance456789.…”

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confidence: 99%

“…Intensive research has been carried out in an effort to explore cathode compositions suitable for operation at low temperature467101112131415. Oxides offering high mixed ionic and electronic conductivities (MIECs) are considered to be some of the most promising candidates for the next generation of SOFC cathodes due to their extended active sites for ORR when compared with purely electronic conducting materials1617.…”

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confidence: 99%

“…Choi et al 12. developed a novel MIEC cathode PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ that exhibits a polarization resistance as low as ∼0.33 Ω cm 2 at 500 °C, and the NdBa 0.75 Ca 0.25 Co 2 O 5+δ material also shows an outstanding ORR activity at reduced temperature7. Another MIEC cathode composition, Ba 0.9 Co 0.7 Fe 0.2 Mo 0.1 O 3−δ , was also reported to show an enhanced cathode performance with a polarization resistance of ∼0.28 Ω cm 2 at 500 °C (ref.…”

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A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

et al. 2017

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The slow activity of cathode materials is one of the most significant barriers to realizing the operation of solid oxide fuel cells below 500 °C. Here we report a niobium and tantalum co-substituted perovskite SrCo0.8Nb0.1Ta0.1O3−δ as a cathode, which exhibits high electroactivity. This cathode has an area-specific polarization resistance as low as ∼0.16 and ∼0.68 Ω cm2 in a symmetrical cell and peak power densities of 1.2 and 0.7 W cm−2 in a Gd0.1Ce0.9O1.95-based anode-supported fuel cell at 500 and 450 °C, respectively. The high performance is attributed to an optimal balance of oxygen vacancies, ionic mobility and surface electron transfer as promoted by the synergistic effects of the niobium and tantalum. This work also points to an effective strategy in the design of cathodes for low-temperature solid oxide fuel cells.

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A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

et al. 2017

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“…Accordingly, the development of cathode materials with high electro-catalytic activity and excellent durability is necessary for commercialization of IT-SOFCs. [3][4][5] In this respect, mixed ionic electronic conductors (MIECs) based on transition metal (e.g. Mn, Fe, Co, and Ni) oxides have received remarkable attention.…”

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Scale-Down and Sr-Doping Effects on La₄Ni₃O_10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs

Kim

Choi

Jun

et al. 2014

J. Electrochem. Soc.

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Among the Ruddlesden-Popper series, La n+1 Ni n O 3n+1 (n = 1, 2, and 3) has attracted tremendous attention as an intermediate temperature solid oxide fuel cell (IT-SOFC) cathode because of its favorable properties for realizing high performance. Inter alia, La 4 Ni 3 O 10-δ (n = 3) has in particular gained recognition as a promising cathode material owing to its high electrical conductivity and cell performance in IT-SOFC applications. The fabrication of nano-sized La 4 Ni 3 O 10-δ composites requires a low sintering temperature process because high sintering temperature gives rise to solid state reactions between the constituents, which leads to the formation of an undesired electrical insulator and the formation of a low surface area thin-film on the surface. The infiltration method is therefore chosen to fabricate nano-sized La 4 Ni 3 O 10-δ composites because it can provide reduced particle size of La 4 Ni 3 O 10-δ by separating the sintering process of the cathode from the high temperature sintering process of the electrolyte. In this work, we investigated the electrochemical properties of La 4 Ni 3 O 10-δ composites prepared by an infiltration method in terms of application as an IT-SOFC cathode material as well as the effect of strontium doping at La sites. A fuel cell converts chemical energy to electrical energy by using hydrogen or hydrocarbon as fuel. Inter alia, a solid oxide fuel cell (SOFC) is a promising power generation device with high efficiency, excellent performance, low emissions, and attractive fuel flexibility at high operating temperature. Nevertheless, high operating temperature gives rise to some drawbacks such as interface reactions between cell components, electrode phase transitions, restrictions on choice of materials, and so on. The key to solving those problems lies in developing intermediate-temperature SOFCs (IT-SOFCs) (500-700• C). 1,2However, the low operating temperature gives rise to poor activity for the oxygen reduction reaction (ORR) at the cathode. Accordingly, the development of cathode materials with high electro-catalytic activity and excellent durability is necessary for commercialization of IT-SOFCs. [3][4][5] In this respect, mixed ionic electronic conductors (MIECs) based on transition metal (e.g. Mn, Fe, Co, and Ni) oxides have received remarkable attention. 3,4,6 MIECs have the capability to conduct oxygen ions and electrons simultaneously, which leads to an increase of electrochemical reactive sites. It is generally accepted that the entire surface of MIECs may work as reactive sites for the ORR, because the ORR can occur at not only the triple phase boundary (TPB) but also the two phase boundary (2PB).6,7 Specifically, the TPB is a reaction site where the gas phase meets the electronic and ionic conducting phases at the electrode-electrolyte interface. In the case of MIECs, the ORR also occurred at the 2PB, which corresponds with the interface boundaries between MIECs and oxygen gas.Among various MIECs, cobalt containing oxides such as LaCoO 3 , PrCoO 3 , and...

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Cathodes for Solid Oxide Fuel Cell

Zhou

Jin

2020

Solid Oxide Fuel Cells

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Development of Double‐Perovskite Compounds as Cathode Materials for Low‐Temperature Solid Oxide Fuel Cells

Cited by 190 publications

References 30 publications

A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

Scale-Down and Sr-Doping Effects on La₄Ni₃O_10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs

Cathodes for Solid Oxide Fuel Cell

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Development of Double‐Perovskite Compounds as Cathode Materials for Low‐Temperature Solid Oxide Fuel Cells

Cited by 190 publications

References 30 publications

A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

Scale-Down and Sr-Doping Effects on La4Ni3O10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs

Cathodes for Solid Oxide Fuel Cell

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Scale-Down and Sr-Doping Effects on La₄Ni₃O_10-δ–YSZ Nanocomposite Cathodes for IT-SOFCs