Effect of Cl doping on the electrochemical performance of Sr2Fe1.5Mo0.5O6− cathode material for solid oxide fuel cells

Zhu, Zongchao; Gu, Yu; Chen, Han; Zheng, Yuan; Ge, Lin

doi:10.1016/j.ceramint.2020.06.046

Cited by 32 publications

(17 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 10 shows the variation of Rp with the temperature for LCO, F0.1, Cl0.1, Cl0.2, Br0.1 As can be observed, a substantial decrease in the polarization resistance (R p ) is observed for the halogenated samples. Such an improvement in the ORR activity is explained by the incorporation of the halogens into the LCO structure, which improves the mobility of the oxygen vacancies in the lattice and increases both the ionic and electronic conductivity [33]. Halogen doping above x > 0.1 leads to higher R p values, which are possibly associated with secondary phase segregation, as previously observed using XRPD.…”

Section: Electrode Polarization Resistancesupporting

confidence: 57%

“…A promising alternative to alkaline-earth doping is the modification of the anionic framework by halogen doping, which weakens the metal-oxygen bond energy and favors oxygen mobility during the ORR [31]. Recently, the electrochemical performance of single and layered perovskite-type electrodes, such as SrFe 0.9 Ti 0.9 O 3−δ , Sr 2 Fe 1.5 Mo 0.5 O 6−δ , La 0.5 Ba 0.5 FeO 3−δ and NdBaCoFeO 5+δ , have been enhanced by anion doping, improving the oxygen surface exchange coefficients and decreasing the polarization resistance [32][33][34][35]. For instance, Zhang et al observed a change in the crystal symmetry of Sr 2 Fe 1.5 Mo 0.5 O 6−x−δ F x , SFMF, x = 0, 0.1, 0.2 and 0.3), as well as enhanced electrocatalytic activity for the ORR with a polarization resistance of 0.072 Ω cm 2 at 800 • C [31].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes

et al. 2022

View full text Add to dashboard Cite

Ruddlesden–Popper type electrodes with composition La2CuO4−δ are alternative cathode materials for solid oxide fuel cells (SOFCs); however, the undoped compound exhibits low electrical conductivity for potential applications, which is usually increased by alkaline-earth doping. A promising alternative to alkaline-earth doping is the modification of the anionic framework by halogen doping. In this study, La2CuO4−0.5xAx (A = F, Cl, Br; x = 0–0.3) compounds are prepared by a freeze-drying precursor method, using an anion doping strategy. The composition, structure, morphology and electrical properties are studied to evaluate their potential use in solid oxide fuel cells (SOFCs). The halogen-doped materials show higher electrical conductivity and improved electrocatalytic activity for oxygen reduction reactions when compared to the pristine material, with polarization resistance values 2.5 times lower, i.e., 0.20, 0.11 and 0.08 Ω cm2 for undoped, F- and Cl-doped samples, respectively, at 800 °C. Moreover, halogen doping prevents superficial copper segregation in La2CuO4−δ, making it an attractive strategy for the development of highly efficient electrodes for SOFCs.

show abstract

Section: Electrode Polarization Resistancesupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes

et al. 2022

View full text Add to dashboard Cite

show abstract

“…At 600 °C, the R P value of the Sr 2 Fe 1.5 Mo 0.5 O 5.8−δ Cl 0.2 cathode is found to be the lowest (1.987 Ω cm 2 ). 45 Xia et al reported that fluorine doping into the oxygen site of PrBaCo 2 O 5+δ double-perovskite cathodes enhances the durability and ORR activity of fuel cells. 42 On the basis of these previous studies, we aimed to enhance the ORR performance of NdBaCoFeO 5+δ (NBCF) doubleperovskite cathode by doping fluorine anions into the oxygen sites.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, a novel doping strategy has been proposed to enhance the electrochemical performance of IT-SOFC cathodes by incorporating fluorine or chlorine anions into oxygen sites in perovskites. − Shao and co-workers reported that the ORR activity of SrFeO 3−δ and SrFe 0.9 Ti 0.1 O 2.90−δ is improved after fluorine doping, where the R P values of the above two materials at 600 °C are 0.393 and 0.491 Ω cm 2 , respectively . The chlorine doping into the Sr 2 Fe 1.5 Mo 0.5 O 6−δ has been shown to significantly lower the R P value.…”

Section: Introductionmentioning

confidence: 99%

“…The chlorine doping into the Sr 2 Fe 1.5 Mo 0.5 O 6−δ has been shown to significantly lower the R P value. At 600 °C, the R P value of the Sr 2 Fe 1.5 Mo 0.5 O 5.8−δ Cl 0.2 cathode is found to be the lowest (1.987 Ω cm 2 ) . Xia et al reported that fluorine doping into the oxygen site of PrBaCo 2 O 5+δ double-perovskite cathodes enhances the durability and ORR activity of fuel cells …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Manipulating the Activity and Thermal Compatibility of NdBaCoFeO_5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells via Fluorine Doping

Guan

Wang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The use of LnBaCo 2 O 5+δ (Ln = rare earth) cathodes in intermediatetemperature solid oxide fuel cells (IT-SOFCs) is limited by their high thermal expansion coefficients (TECs). Unfortunately, the electrocatalytic activity of LnBaCo 2 O 5+δ cathodes is also decreased significantly while reducing the TECs. Here, we report the simultaneous enhancement of the oxygen-reduction activity and thermal expansion compatibility of the NdBaCoFeO 5+δ (NBCF) double-perovskite cathode for IT-SOFCs via fluorine doping at the oxygen sites, that is, NdBaCoFeO 5+δ-x F x (NBCFFx, x = 0.05 and 0.10). The maximum power density of the single cell with a configuration of NiO− Ce 0.8 Sm 0.2 O 2 /Ce 0.8 Sm 0.2 O 2 /La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3−δ /NBCFF0.05 attains 504 mW cm −2 at 700 °C in dry H 2 . Compared with the pristine NBCF, the polarization resistances of NBCFF0.05 are down by 18.9, 17.0, 13.9, and 10.5% from 650 to 800 °C with an interval of 50 °C, respectively, while the average TEC is decreased by 3.6%. Based on the analysis of distribution of relaxation time from impedance data, the oxygen surface exchange and bulk diffusion are the rate-limiting steps in the oxygen-reduction reaction, which can be improved by fluorine doping. Our results suggest that the fluorine doping at oxygen sites shows a better ability to promote the performance of the cathode material in IT-SOFCs.

show abstract

Recent Progress and Future Prospects of Anions O‐site Doped Perovskite Oxides in Electrocatalysis for Various Electrochemical Systems

Yang,

Tian,

Yang

et al. 2023

Advanced Science

View full text Add to dashboard Cite

With the rapid development of novel energy conversion and storage technologies, there is a growing demand for enhanced performance in a wide range of electrocatalysts. Perovskite oxides (ABO3) have caused widespread concerns due to their excellent electrocatalytic properties, low cost, stable and reliable performance. In recent years, the research on anion O‐site doping of perovskite oxides has been a cynosure, which is considered as a promising route for enhancing performance. However, a systematic review summarizing the research progress of anion‐doped perovskite oxides is still lacking. Therefore, this review mainly introduces the elements and strategies of various common anions doped at O‐site of perovskite oxides, analyzes their influence on the physical and chemical properties of perovskites, and separately concludes their applications in electrocatalysis. This review will provide ideas and prospects for the development of subsequent anion doping strategies for high performance perovskite oxides.

show abstract

Effect of Cl doping on the electrochemical performance of Sr2Fe1.5Mo0.5O6− cathode material for solid oxide fuel cells

Cited by 32 publications

References 51 publications

Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes

Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes

Manipulating the Activity and Thermal Compatibility of NdBaCoFeO_5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells via Fluorine Doping

Recent Progress and Future Prospects of Anions O‐site Doped Perovskite Oxides in Electrocatalysis for Various Electrochemical Systems

Contact Info

Product

Resources

About

Effect of Cl doping on the electrochemical performance of Sr2Fe1.5Mo0.5O6− cathode material for solid oxide fuel cells

Cited by 32 publications

References 51 publications

Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes

Modification of the Microstructure and Transport Properties of La2CuO4−δ Electrodes via Halogenation Routes

Manipulating the Activity and Thermal Compatibility of NdBaCoFeO5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells via Fluorine Doping

Recent Progress and Future Prospects of Anions O‐site Doped Perovskite Oxides in Electrocatalysis for Various Electrochemical Systems

Contact Info

Product

Resources

About

Manipulating the Activity and Thermal Compatibility of NdBaCoFeO_5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells via Fluorine Doping