Co-substituted Sr2Fe1.5Mo0.5O6-δ as anode materials for solid oxide fuel cells: Achieving high performance via nanoparticle exsolution

Yang, Yan‐Ru; Wang, Yarong; Yang, Zhibin; Lei, Ze; Jin, Chao; Liu, Youdao; Wang, Yuhao; Peng, Suping

doi:10.1016/j.jpowsour.2019.226989

Cited by 57 publications

(29 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sr 2 Fe 1.5 Mo 0.5 O 6−δ (SFM) is a well-investigated electrode for SOFCs because of its strong redox-ability [30], and it is frequently employed as the anode material rather than the cathode material for SOFCs because of its good catalytic activity under low oxygen partial pressure conditions [31][32][33]. Although various studies suggest that SFM may be utilized as the cathode for SOFCs [34,35], it is ineffective when compared with some other conventional perovskite materials.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Sr2Fe1.5Mo0.5O6−δ with Sc as a new single-phase cathode for proton-conducting solid oxide fuel cells

Zhang

Yin

et al. 2022

Sci. China Mater.

View full text Add to dashboard Cite

Sc-doped Sr 2 Fe 1.5 Mo 0.5 O 6−δ (SFMSc) was successfully synthesized by partially substituting Mo in Sr 2 Fe 1.5 -Mo 0.5 O 6−δ (SFM) with Sc, resulting in a higher proton diffusion rate in the resultant SFMSc sample. Theoretical calculations showed that doping Sc into SFM lowered the oxygen vacancy formation energy, reduced the energy barrier for proton migration in the oxide, and increased the catalytic activity for oxygen reduction reaction. Next, a proton-conducting solid oxide fuel cell (H-SOFC) with a single-phase SFMSc cathode demonstrated significantly higher cell performance than that of cell based on an Sc-free SFM cathode, achieving 1258 mW cm −2 at 700°C. The performance also outperformed that of many other H-SOFCs based on single-phase cobalt-free cathodes. Furthermore, no trade-off between fuel cell performance and material stability was observed. The SFMSc material demonstrated good stability in both the CO 2 -containing atmosphere and the fuel cell application. The combination of high performance and outstanding stability suggests that SFMSc is an excellent cathode material for H-SOFCs.

show abstract

Section: Introductionmentioning

confidence: 99%

Tailoring Sr2Fe1.5Mo0.5O6−δ with Sc as a new single-phase cathode for proton-conducting solid oxide fuel cells

Zhang

Yin

et al. 2022

Sci. China Mater.

View full text Add to dashboard Cite

show abstract

“…The high intermediate frequency peak observed in the case of the PBCCFe40 electrode indicates that the catalytic activity is deteriorated by Fe doping. This is probably caused by the stronger Fe–O bonding compared to the Co–O bonding affecting the adsorption and desorption of the mobile oxygen from oxygen lattice in the mobile oxygen channel. , However, it is worth noting that the R pol values of the PBCCFe40/PBCCFe5 electrode are 0.021 and 0.234 Ω cm –2 at 700 and 550 °C, respectively, which are similar to those of the PBCCFe5 electrode. As mixed oxide ionic-electronic conductors, PBCCFe40 and PBCCFe5 electrodes can extend the reaction sites beyond the triple-phase boundaries near the electrode–electrolyte interface .…”

Section: Results and Discussionmentioning

confidence: 99%

Rational Design of Two-Layer Fe-Doped PrBa_0.8Ca_0.2Co₂O_6−δ Double Perovskite Oxides for High-Performance Fuel Cell Cathodes

et al. 2021

View full text Add to dashboard Cite

A solid oxide fuel cell (SOFC) offers an attractive route to convert chemical energy into electrical energy; however, its commercial application is often limited by the large mismatch in thermal expansion coefficients (TECs) between the cathode and electrolyte and the insufficient activity of cathodes. Fe-doped PrBa 0.8 Ca 0.2 Co 2 O 6−δ (PBCC) are promising cathode materials due to their high conductivity and excellent oxygen-reduction activity, in which Fe doping in PBCC can decrease the TEC to achieve better compatibility with the electrolyte, but excessive Fe will inhibit the oxygen kinetics. Here, we construct a two-layer PBCC cathode (TLC), which consists of a high Fe content layer with good thermal compatibility to electrolytes and a low Fe content layer with high ionic and electronic conductivity. Compared to homogeneous PBCC electrodes, the cell with TLC has a lower activation energy and a higher peak power density (1259.3 mW cm −2 at 700 °C). Meanwhile, it exhibits admirable stability up to 200 h in constant potential mode (0.8 V), and importantly, no discernible degradation is observed in further stability tests in the constant current mode (444 mA cm −2 ) for 200 h. The results reveal that the TLC based on double perovskite Fe-doping isostructural oxide is a promising candidate electrode for SOFC.

show abstract

“…The exsolution of Co is one of the most popular areas of research in the exsolution field and literature is quite diverse with many publications in areas of application, including, but not limited to, CO [26,115] or soot oxidation, [116] Zn-air batteries, [70] chemical looping, [117] and fuel cells. [118] Co particles can be active for both anode [119] and the cathode [120] as well as in symmetrical cells [121] in SOFCs.…”

Section: Cobaltmentioning

confidence: 99%

Emergence and Future of Exsolved Materials

Kousi

Tang

Metcalfe

et al. 2021

Small

130

107

View full text Add to dashboard Cite

game-changing across multiple fields including but not limited to energy conversion and storage and catalysis, as evidenced by more than 300 papers having been published since the first reports of the method a decade ago. However, to the best of our knowledge only four reviews covering different application-related aspects of exsolution have been published so far. [17][18][19][20] Here, we review the trends that define the development of the exsolution concept in terms of design, tunability, functionality, and applicability. We analyze a set of 300 papers published so far on exsolution, to extract statistical information in terms of design elements (types of crystal structures, exsolvable and host lattice elements), synthesis routes, functionalities, and fields of application, including electrochemistry, catalysis photocatalysis, and other (discussed separately for noble and non-noble metal systems). The selected papers are listed and analyzed in the Supporting Information and the results are summarized in the infographic shown in Figure 3 and in Table 1 and based on these, we highlight exciting future directions of research in this fast-growing field. Figure 3. Exsolution infographic. Statistical analysis on a pool of 300 papers published on the field of exsolution since 2010.

show abstract

Co-substituted Sr2Fe1.5Mo0.5O6-δ as anode materials for solid oxide fuel cells: Achieving high performance via nanoparticle exsolution

Cited by 57 publications

References 29 publications

Tailoring Sr2Fe1.5Mo0.5O6−δ with Sc as a new single-phase cathode for proton-conducting solid oxide fuel cells

Tailoring Sr2Fe1.5Mo0.5O6−δ with Sc as a new single-phase cathode for proton-conducting solid oxide fuel cells

Rational Design of Two-Layer Fe-Doped PrBa_0.8Ca_0.2Co₂O_6−δ Double Perovskite Oxides for High-Performance Fuel Cell Cathodes

Emergence and Future of Exsolved Materials

Contact Info

Product

Resources

About

Co-substituted Sr2Fe1.5Mo0.5O6-δ as anode materials for solid oxide fuel cells: Achieving high performance via nanoparticle exsolution

Cited by 57 publications

References 29 publications

Tailoring Sr2Fe1.5Mo0.5O6−δ with Sc as a new single-phase cathode for proton-conducting solid oxide fuel cells

Tailoring Sr2Fe1.5Mo0.5O6−δ with Sc as a new single-phase cathode for proton-conducting solid oxide fuel cells

Rational Design of Two-Layer Fe-Doped PrBa0.8Ca0.2Co2O6−δ Double Perovskite Oxides for High-Performance Fuel Cell Cathodes

Emergence and Future of Exsolved Materials

Contact Info

Product

Resources

About

Rational Design of Two-Layer Fe-Doped PrBa_0.8Ca_0.2Co₂O_6−δ Double Perovskite Oxides for High-Performance Fuel Cell Cathodes