Enhancement of an IT-SOFC cathode by introducing YSZ: Electrical and electrochemical properties of La0.6Ca0.4Fe0.8Ni0.2O3-δ-YSZ composites

Jafari, Mitra; Salamati, H.; Zhiani, Mohammad; Shahsavari, E.

doi:10.1016/j.ijhydene.2018.10.151

Cited by 16 publications

(5 citation statements)

References 67 publications

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“…It can be concluded that Pr 0.5 Ba 0.5 Fe 1-x Ni x O 3-δ (x = 0 and 0.2) oxides have the potential to be cathode materials for SOFCs. Moreover, all of them have relatively excellent electrochemical performance when Ni doping amount is 0.2 in the A-site alkaline earth metal-doped cobalt and strontium-free cathode materials, as reported in La 0.6 Ba 0.4 Fe 0.8 Ni 0.2 O 3-δ [28], La 0.6 Ca 0.4 Fe 0.8 Ni 0.2 O 3-δ [29], Pr 0.4 Ca 0.6 Fe 0.8 Ni 0.2 O 3 [30], and Pr 0.5 Ba 0.3 Ca 0.2 Fe 1-x Ni x O 3-δ [31]. Motivated by these findings, we prepared novel perovskite Pr 0.5 Ba 0.5 Fe 1-x Ni x O 3-δ (x = 0 and 0.2) as cathode electrocatalysts by a sol-gel method, study in detail its potential as a new type of perovskite cathode, and discuss the influence of Ni substitution on the structure and electrochemical properties of Pr 0.5 Ba 0.5 FeO 3-δ .…”

Section: Introductionsupporting

confidence: 65%

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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Section: Introductionsupporting

confidence: 65%

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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“…287 Jafari et al showed an ASR at 0.008 Ω cm 2 (750 °C) for the La 0.6 Ca 0.4 Fe 0.8 Ni 0.2 O 3− δ –YSZ (LCFN–YSZ) composite. 288…”

Section: Composite Cathodesmentioning

confidence: 99%

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

et al. 2022

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“…It is well known that most cathodes tend to react with the electrolyte during the manufacturing or operation at the sintering temperature, which is normally 50-100 °C higher than the maximum operating temperature of cathode [56]. An analysis of the possible changes in the morphology was performed in selected cathode/electrolyte systems (Pr = 0.52 or 0.…”

Section: Characterization Of the Cathode/electrolyte Systemsmentioning

confidence: 99%

Microwave irradiation synthesis to obtain La0.7-xPrxCa0.3MnO3 perovskites: Electrical and electrochemical performance

Ferrel-Álvarez

Domínguez‐Crespo

Cong

et al. 2021

Journal of Alloys and Compounds

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La0.7-xPrxCa0.3MnO3 (LPCM) perovskites previously synthesized by the microwave-assisted method at 4 minutes and with different stoichiometry (x=0.35, 0.52 and 0.63) were evaluated through thermogravimetric analysis (TGA), electrical conductivity, thermal expansion coefficient (TEC), scanning electron microscopy (SEM), Brunauer-Emmet-Teller (BET) analysis and electrochemical impedance spectroscopy (EIS) using yttria stabilized zirconia (YSZ) as an electrolyte. The results are discussed in terms of the potential as cathode material to be applied in solid oxide fuel cells (SOFCs) applications at temperatures from 600 to 800 °C. Results derived from TGA showed that Pr promotes the uncoupling oxygen and oxygen vacancies favoring the fuel combusting. Also, TEC analysis revealed adequate stability between the YSZ electrolyte and the La0.7-xPrxCa0.3MnO3 to avoid cracking or failing, especially with high amount of Pr. The transition in morphology from irregular to regular shapes improves the BET and Barret-Joyner-Halenda (BJH) surfaces and promotes the triple phase boundary (TPB) connectivity. The electrical conductivity correlated to the availability in oxygen vacancies showed maximum conductivities in the order of 10 -2 S cm -1 . Activation energy (Ea) was found to be reduced with a minimum quantity of Pr (0.071 eV). EIS results indicate that the oxygen vacancies in the LPCM/YSZ system were better promoted with the highest amount of Pr= 0.63 (=0.9 V, 800 °C and 0.06 V of amplitude) in comparison with the minimum, Pr=0.35 (=1.2 V, 800 °C and 0.06 V of amplitude).

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Enhancement of an IT-SOFC cathode by introducing YSZ: Electrical and electrochemical properties of La0.6Ca0.4Fe0.8Ni0.2O3-δ-YSZ composites

Cited by 16 publications

References 67 publications

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

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

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

Microwave irradiation synthesis to obtain La0.7-xPrxCa0.3MnO3 perovskites: Electrical and electrochemical performance

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