Pr2NiO4-Pr0.2Ce0·8O1.9 composite cathode as a potential cathode material for intermediate temperature solid oxide fuel cells

Xu, Chen; Wang, Jianqiu; Liang, Qingwen; Sun, Xi; Zhu, Xiaofei; Zhou, Defeng; Meng, Jian

doi:10.1016/j.solidstatesciences.2019.106108

Cited by 36 publications

(11 citation statements)

References 50 publications

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“…On the contrary, the open-circuit voltage (OCV) value decreased with the temperature, and it was under the theoretical value of 1.04-1.1 V. This was because Ce 4+ in the electrolyte was reduced to Ce 3+ in part under a hightemperature reducing atmosphere, thereby forming a certain n-type conductivity. This phenomenon caused a short circuit inside the single cell [37,47,52]. The maximum power density of Cell-II was higher than Cell-I at 500-700 °C, which was consistent with the above R P value trend.…”

Section: Electrochemical Performance and Long-term Stability Of A Single Cellsupporting

confidence: 81%

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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: Electrochemical Performance and Long-term Stability Of A Single Cellsupporting

confidence: 81%

“…Rs stands for the ohmic resistance. R 1 is the high-frequency resistance associated with the process of charge transfer, and R 2 is the low-frequency resistance corresponding to the process of oxygen adsorption, dissociation, and diffusion [47]. CPE is a constant phase element.…”

Section: Electrochemical Performance Of Symmetric Cellmentioning

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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“…These corresponding values are displayed in Table 3. The maximum open-circuit voltage (OCV) of Cell-I, Cell-II, and Cell-III were 0.807, 0.898, and 0.836 V, respectively, which were all lower than the theoretical value of 1.04-1.1 V (Wang H. et al, 2019;Chen et al, 2020). In the high-temperature range, the OCV was further reduced.…”

Section: Single Cell Performancementioning

confidence: 88%

Heterointerface Effect in Accelerating the Cathodic Oxygen Reduction for Intermediate-Temperature Solid Oxide Fuel Cells

Zhu

Meng

et al. 2022

Front. Chem.

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A solid-state mixing method was adopted to prepare a new Pr0.8Sr0.2Fe0.7Ni0.3O3−δ-Pr1.2Sr0.8Fe0.4Ni0.6O4+δ (PSFN113-214) composite cathode oxide for the solid oxide fuel cells (SOFCs). Herein, heterointerface engineering was investigated for the performance enhancement. It was found that the oxygen vacancy content could be increased by mixing the PSFN214 with PSFN113, which gave rise to the formation of a heterostructure, and resulted in the promotion of oxygen ion transport as well as the specific surface area. The optimum mixing ratio 5:5 resulted in the highest oxygen vacancy content and the largest specific surface area, indicating the strongest interface effect. Polarization resistance of PSFN113-214 (5:5) was 0.029 Ω cm2 at 800°C, which was merely 24% of PSFN113 and 39% of PSFN214. The corresponding maximum power density was 0.699 W cm−2, which was nearly 1.44 times of PSFN113 and 1.24 times of PSFN214. Furthermore, the voltage attenuation rate after 100 h was merely 0.0352% h−1. Therefore, the new PSFN113-214 composite could be a prospective cathode oxide for SOFCs.

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“…Chen et al prepared a novel Pr 2 NiO 4 (PNO)–Pr 0.2 Ce 0.8 O 1.9 (PCO) composite cathode through solid-state mixing and a modified sol–gel method, 286 where the PNO–PCO composite cathode obtained by the sol–gel method exhibited better electrochemical performance due to uniform particle size distribution and porosity with GDC electrolyte (ASR = 0.09 Ω cm 2 at 800 °C), and the NiO–GDC/GDC/PNO–PCO single cell yielded an MPD of 0.57 W cm −2 at 800 °C. 286 Co-doped double perovskite-type cobaltite Pr 0.9 Y 0.1 BaCo 1.8 Ni 0.2 O 6− δ (PYBCN)–SDC (PYBCN–SDC) composite exhibited an ASR value of 0.045 Ω cm 2 at 800 °C where the lower ASR was attributed predominantly to a large concentration of O 2− vacancies in the cobaltite component of the composite. 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.…”

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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Pr2NiO4-Pr0.2Ce0·8O1.9 composite cathode as a potential cathode material for intermediate temperature solid oxide fuel cells

Cited by 36 publications

References 50 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

Heterointerface Effect in Accelerating the Cathodic Oxygen Reduction for Intermediate-Temperature Solid Oxide Fuel Cells

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

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