A new cobalt-free composite cathode Pr 0.6 Sr 0.4 Cu 0.2 Fe 0.8 O 3−δ -Ce 0.8 Sm 0.2 O 2−δ  for proton-conducting solid oxide fuel cells

Gong, Zheng; Hou, Jie; Wang, Zhongtao; Cao, Jiafeng; Zhang, Junyu; Liu, Wei

doi:10.1016/j.electacta.2015.07.159

Cited by 26 publications

(8 citation statements)

References 39 publications

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“…Compared to those conventional DCO-based SOFCs, the OCV values are significantly increased. The OCVs are comparable with other DCO-based cells with in situ formed electron-blocking layers ,,, and even higher than some cells with bilayer electrolytes. ,, …”

Section: Resultssupporting

confidence: 66%

“…To form sufficient porosity, 20 wt % starch was added into NiO-SDC composite power by ball milling. Trilayered anode-supported green half cells with NiO-SDC anode support, NiO-BZCY AFL and SDC electrolyte membrane were prepared via a dry-pressing method. , The diameter of the green cell is 15 mm, and the thickness is about 1 mm. Finally, the green cells were cofired at 1300 or 1350 °C for 5 h. The cells with different thick AFL layer were fabricated by control the quality of the powders during dry pressing.…”

Section: Methodsmentioning

confidence: 99%

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Tuning the Thickness of Ba-Containing “Functional” Layer toward High-Performance Ceria-Based Solid Oxide Fuel Cells

Gong

Sun

Shan

et al. 2016

ACS Appl. Mater. Interfaces

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Developing highly efficient ceria-based solid oxide fuel cells with high power density is still a big concern for commercial applications. In this work, a novel structured Ce0.8Sm0.2O2-δ (SDC)-based fuel cell with a bilayered anode consisting of Ni-SDC and Ni-BaZr0.1Ce0.7Y0.2O3-δ (Ni-BZCY) was designed. In addition to the catalysis function, the Ni-BZCY anode "functional" layer also provides Ba source for generating an electron-blocking layer in situ at the anode/electrolyte interface during sintering. The Ni-BZCY thickness significantly influences the quality of the electron-blocking layer and electrochemical performances of the cell. The cell with a 50 μm thick Ni-BZCY layer exhibits the best performance in terms of open circuit voltage (OCV) and peak power density (1068 mW cm(-2) at 650 °C). The results demonstrate that this cell with an optimal structure has a distinct advantage of delivering high power performance with a high efficiency at reduced temperatures.

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Section: Resultssupporting

confidence: 66%

Section: Methodsmentioning

confidence: 99%

Tuning the Thickness of Ba-Containing “Functional” Layer toward High-Performance Ceria-Based Solid Oxide Fuel Cells

Gong

Sun

Shan

et al. 2016

ACS Appl. Mater. Interfaces

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“…700 °C) while the performance at LT down to 500 °C is inferior. Simultaneously, the PDC-BCC-SBCC-CuO has similar performance output with La0.7Sr0.3FeO3-δ-SDC 41 and Pr0.6Sr0.4Cu0.2Fe0.8O3-δ-SDC 44 at 500 °C and much higher MPD performance than the reported cobalt-free composite PBCs at the temperature range 550-700 °C, which indicates that PDC-BCC-SBCC-CuO is a preferable HPLT cobalt-free PBC material for H-SOFC.…”

Section: Microstructuresmentioning

confidence: 64%

A novel in situ diffusion strategy to fabricate high performance cathodes for low temperature proton-conducting solid oxide fuel cells

et al. 2018

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“…Among various Co‐free perovskite cathodes summarized in this review, Nb‐doped cathodes mostly show promise considering their lower polarization resistances relative to other cathode compositions. Table shows the rankings for Co‐free perovskite cathodes with polarization resistances below 0.10 Ω cm −2 at 700 °C –––. The polarization resistance of other Co‐free perovskite cathodes however should be further decreased, to at least below a target polarization resistance value of 0.15 Ω cm −2 (below 550 °C) specified by Steele et al.…”

Section: Discussionmentioning

confidence: 99%

Cobalt‐Free Perovskite Cathodes for Solid Oxide Fuel Cells

et al. 2019

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The past decade has observed rapid growth in the development of cobalt-free perovskite cathodes, which provide enhanced structure and operational stability at the operating temperature of intermediate temperature solid oxide fuel cells (IT-SOFC, 600-800°C) compared to its cobalt-containing counterpart. This Review aims to present a comprehensive overview on the status and advances of the existing cobalt-free perovskite cathodes for IT-SOFCs by discussing electrochemical behaviors, thermal expansion properties, stabilities as well as the oxygen ionic and the electronic transport properties of these cobalt-free perovskite cathode compositions, with primary emphasis on the relationship between the electrochemical performances and the materials science-related factors. Among various cobalt-free perovskite cathodes presented in this Review, niobium-doped compositions generally show lower polarization resistances relative to other cathode compositions.[a] Dr. performance and materials science-related factors. The review is divided into four sections. This first section justifies the SOFC technology significance and its context. The second section features the pertaining aspects on the development of cobaltfree perovskite cathodes according to electrochemical performance, chemical compatibility with electrolytes, thermal expansion mismatch, and overview of the composite perovskite cathodes. The third section provides comparative insights into the performances of single, double, and composite cobalt-free perovskite cathodes focusing into thermal and electrochemical parameters, i. e., thermal expansion coefficient (TEC), total electrical conductivity, polarization resistance and its corresponding activation energy. Synthesis routes, lattice cell parameters, oxygen content, and other available data are also included. The fourth section, in turn, overviews, challenges and outlook for further research and development of cobalt-free perovskite cathodes and concludes the review.

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A new cobalt-free composite cathode Pr 0.6 Sr 0.4 Cu 0.2 Fe 0.8 O 3−δ -Ce 0.8 Sm 0.2 O 2−δ for proton-conducting solid oxide fuel cells

Cited by 26 publications

References 39 publications

Tuning the Thickness of Ba-Containing “Functional” Layer toward High-Performance Ceria-Based Solid Oxide Fuel Cells

Tuning the Thickness of Ba-Containing “Functional” Layer toward High-Performance Ceria-Based Solid Oxide Fuel Cells

A novel in situ diffusion strategy to fabricate high performance cathodes for low temperature proton-conducting solid oxide fuel cells

Cobalt‐Free Perovskite Cathodes for Solid Oxide Fuel Cells

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