Facile surface modification of LSCF/GDC cathodes by epitaxial deposition of Sm0.5Sr0.5CoO3via ultrasonic spray infiltration

Song, You Hwa; Rehman, Saeed Ur; Kim, Hye Sung; Song, Ho Seon; Song, Rak Hyun; Lim, Tak‐Hyoung; Hong, Jong‐Eun; Park, Seok Joo; Huh, Joo Youl; Lee, Seung‐Bok

doi:10.1039/c9ta11704k

Cited by 51 publications

(22 citation statements)

References 43 publications

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“…The performance tests demonstrated that Ag infiltration significantly improved the electrochemical performance and a maximum of 537 mWcm −2 power density was attained at 700°C. Song et al [152] infiltrated the Sm 0.5 Sr 0.5 CoO 3-δ (SSC) nano-particles into porous LSCF-GDC cathode. This doubled the cell performance and was attributed to the high mixed ionic and electronic conductivity of SSC.…”

Section: Single-cell Performancementioning

confidence: 99%

Flat-tubular solid oxide fuel cells and stacks: a review

Khan

Iltaf

Ishfaq

et al. 2021

Journal of Asian Ceramic Societies

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Solid oxide fuel cells (SOFCs) offer numerous advantages in terms of high efficiency and clean electrochemcial energy conversion devices. However, owing to high operation temperature, this technology is restricted to stationary applications and leads to components degradation and long-term stability issues. The development of new design and their modifications for improving the electrochemical performance at intermediate temperatures and durability of the SOFC components are very important to bring this technology one step closer to the market. In this context, the current research on the development, properties, performance, and stability of geometrically modified flat-tubular (FT) SOFC cell and the stack is reviewed in detail. This advanced design exhibits higher performance compared to the tubular type and longer stability in comparison to the planar type SOFCs. The application of the interconnect material is emerging as the key factor influencing the electrical output of the FT-SOFC and operation at high temperatures and current density are the critical issues for cell durability. New stack designs are discussed in detail and experimental findings are summarized.

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Section: Single-cell Performancementioning

confidence: 99%

Flat-tubular solid oxide fuel cells and stacks: a review

Khan

Iltaf

Ishfaq

et al. 2021

Journal of Asian Ceramic Societies

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“…At temperatures below 800°C, LSM cathode was found to have high polarization losses due to its very low ionic conductivity 13 . Furthermore, at this temperature, LSM poorly performs because of the high activation energy ( E a ) of the ORR, resulting in an increase in electrode polarization resistance ( R p ) as the operation temperature decreases 14 …”

Section: Introductionmentioning

confidence: 99%

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

Safian

Malek

Jamil

et al. 2022

Intl J of Energy Research

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Summary High‐temperature solid oxide fuel cells (HT‐SOFCs) generally operate at 800°C to 1000°C and intermediate temperature SOFCs (IT‐SOFCs) at 600°C to 800°C. Reducing the SOFCs operational from high to ITs results in many issues mainly at the cathode site. One of the shortcomings that have been addressed is high polarization losses associated with oxygen reduction reaction (ORR) and degradation of La1−xSrxCo1−yFeyO3−δ (LSCF) cathode materials. Strontium (Sr) has been discovered to segregate and inhibit the surface‐active site for the ORR under specified conditions (temperature, relative humidity, and suppressing activity). It enriched the surface, formed Sr‐rich secondary phases, and eventually changes the composition and the structure of the perovskite surfaces. Therefore, this review aims to summarize the occurrences of Sr segregation at the LSCF cathode surfaces as a function of operating conditions and their effects on the material performance. In addition, the characterization techniques utilized to investigate the Sr segregation, and strategies for Sr segregation mitigation are also discussed.

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“…The kinetics of cathodic oxygen reduction reaction (ORR) decreases significantly as the temperature decreasing, which is a key factor limiting the advancement for intermediate-temperature solid oxide fuel cell (IT-SOFCs) [1,2]. For this reason, finding more suitable cathode electrocatalysts with superior electrocatalytic activity is essential.…”

Section: Introductionmentioning

confidence: 99%

Novel cobalt and strontium-free perovskite Pr0.5Ba0.5Fe1-xNixO3-δ (x=0 and 0.2) as cathode for intermediate-temperature solid oxide fuel cells

Zhang

Chen

et al. 2021

Ionics

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The sol-gel method was adopted to synthesize novel cobalt and strontium-free Pr 0.5 Ba 0.5 Fe 1-x Ni x O 3-δ (x = 0 and 0.2, abbreviated as PBF and PBFN) perovskite oxides. It was aimed to discuss the influence of B-site Ni substitution on structure and electrochemical properties of Pr 0.5 Ba 0.5 FeO 3-δ . The results indicated that PBF-based oxides were both cubic perovskite structure. Ni atoms were successfully doped into the B sites of PBF, resulting in lattice shrinkage. Ni doping could enhance the oxygen reduction activity by increasing the surface oxygen content and the release of lattice oxygen to increase oxygen vacancies. At 700 °C, the cathodic polarization resistance of PBFN (0.0726 Ω•cm 2 ) was lower than PBF (0.122 Ω•cm 2 ), and the maximum power density (PPD) of PBFN (528.79 mW•cm −2 ) was higher than PBF (259.65 mW•cm −2 ). After 80 h polarization, the open-circuit voltage did not change significantly. Therefore, PBFN has the potential to be more suitable cathode material of IT-SOFCs.

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Facile surface modification of LSCF/GDC cathodes by epitaxial deposition of Sm_0.5Sr_0.5CoO₃via ultrasonic spray infiltration

Abstract: Ultrasonic spray infiltration is demonstrated by surface tailoring of LSCF/GDC cathodes by generating high dispersion and epitaxial deposition of Sm0.5Sr0.5CoO3 catalyst nanolayer, which promotes high and stable performance outcomes of the SOFCs.

Cited by 51 publications

References 43 publications

Flat-tubular solid oxide fuel cells and stacks: a review

Flat-tubular solid oxide fuel cells and stacks: a review

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

Novel cobalt and strontium-free perovskite Pr0.5Ba0.5Fe1-xNixO3-δ (x=0 and 0.2) as cathode for intermediate-temperature solid oxide fuel cells

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Facile surface modification of LSCF/GDC cathodes by epitaxial deposition of Sm0.5Sr0.5CoO3via ultrasonic spray infiltration

Abstract: Ultrasonic spray infiltration is demonstrated by surface tailoring of LSCF/GDC cathodes by generating high dispersion and epitaxial deposition of Sm0.5Sr0.5CoO3 catalyst nanolayer, which promotes high and stable performance outcomes of the SOFCs.

Cited by 51 publications

References 43 publications

Flat-tubular solid oxide fuel cells and stacks: a review

Flat-tubular solid oxide fuel cells and stacks: a review

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La 1−x Sr x Co 1−y Fe y O 3− δ materials

Novel cobalt and strontium-free perovskite Pr0.5Ba0.5Fe1-xNixO3-δ (x=0 and 0.2) as cathode for intermediate-temperature solid oxide fuel cells

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Product

Resources

About

Facile surface modification of LSCF/GDC cathodes by epitaxial deposition of Sm_0.5Sr_0.5CoO₃via ultrasonic spray infiltration

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials