Cobalt-free perovskite Ba1-xNdxFeO3-δ air electrode materials for reversible solid oxide cells

You-Dong, Kim; Yang, Jayoon; Saqib, Mohammad; Park, Kwangho; Shin, Jiuk; Jo, Minkyoung; Park, Kwang Min; Lim, Hyung‐Tae; Song, Sun‐Ju; Park, Jun-Young

doi:10.1016/j.ceramint.2020.11.149

Cited by 29 publications

(13 citation statements)

References 41 publications

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“…In addition, in case of excess electric energy, it can operate in solid oxide electrolysis cell (SOEC) mode to convert the remaining electric energy into chemical energy in fuel (H 2 , etc.) and store it for the subsequent SOFC mode. , RSOC generally works at 800–1000 °C, and a high temperature can accelerate the electrode reaction rate. − Therefore, RSOC is a potential key technology for efficient energy conversion and storage applications. − …”

Section: Introductionmentioning

confidence: 99%

Enhancing Bifunctional Electrocatalytic Activities of La_0.5Sr_0.5Co_0.2Fe_0.8O₃ in Reversible Single-Component Cells

Ping

Liu

Wei

et al. 2022

Ind. Eng. Chem. Res.

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Perovskite La0.5Sr0.5Co0.2Fe0.8O3 (LSCF) usually acts as both cathode and anode in a reversible solid oxide cell (RSOC). It is found that the traditional preparation method can be improved to reduce the particle size, increase the specific surface area, and enhance the oxygen vacancy concentration of LSCF, further improving its bifunctional electrocatalytic activity toward oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR). Compared with that of LSCF prepared by the traditional solid-state reaction method, the oxygen vacancy concentration of LSCF prepared by the hard-template method is increased. Moreover, the LSCF prepared by the hard-template method shows better catalytic activity for HOR and ORR. In addition, the rate-determining steps for HOR and ORR on the surface of LSCF prepared by the hard-template method are the charge transfer reaction and the reduction of oxygen atoms to O–, respectively. Furthermore, a single-component fuel cell and a reversible single-component cell composed of LSCF prepared by the hard-template method exhibit better performance for discharge and water electrolysis.

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Section: Introductionmentioning

confidence: 99%

Enhancing Bifunctional Electrocatalytic Activities of La_0.5Sr_0.5Co_0.2Fe_0.8O₃ in Reversible Single-Component Cells

Ping

Liu

Wei

et al. 2022

Ind. Eng. Chem. Res.

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“…Recently partially Ba‐substituted neodymium ferrites attracted increased attention due to various potential applications. For instance, Nd 1‐ x Ba x FeO 3‐ δ perovskite‐type oxides were examined as promising cathode materials for intermediate‐temperature solid oxide full cells (SOFCs), 1–5 the Nd‐doped BaFe 2 O 4 composite was considered as a new material for use in electronic devices for wireless communication 6–9 and the permanent magnets of general formula BaFe 12 O 19 were modified by addition of Nd 2 O 3 in order to improve the magnetic properties of this hexaferrite 10,11 . It was shown that the doped composites enriched in Ba 6 Nd 2 Fe 4 O 15 and BaFe 2 O 4 phases could absorb microwaves selectively in the X‐band 6 .…”

Section: Introductionmentioning

confidence: 99%

Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

et al. 2022

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The phase equilibria in the ½Nd 2 O 3 -BaO-½Fe 2 O 3 system were systematically studied at 1373 K in air and presented in the form of a phase diagram. By X-ray diffraction (XRD) analysis of quenched samples, the homogeneity ranges and crystal structure were determined for the following intermediate oxides: Nd 1-x Ba x FeO 3-δ with 0.0 ≤ x ≤ 0.05 (space group (SG) Pnma) and with 0.6 ≤ x ≤ 0.7 (SG Pm-3m), Ba 6+y Nd 2-y Fe 4 O 15-δ with 0.0 ≤ y ≤ 0.4 (SG P6 3 mc), and Ba 1.1 Nd 1.9 Fe 2 O 7-δ (SG P4 2 /mnm). The structural parameters of single-phase oxides were refined by the Rietveld method. The changes in oxygen content for Nd 1-x Ba x FeO 3-δ (0.6 ≤ x ≤ 0.7), Ba 6 Nd 2 Fe 4 O 15-δ , and Ba 1.1 Nd 1.9 Fe 2 O 7-δ versus temperature in air were determined by thermogravimetric analysis. Gradual substitution of neodymium by barium in the Nd 1-x Ba x FeO 3-δ (0.6 ≤ x ≤ 0.7) oxides leads to a decrease of oxygen content. Partial ordering via formation of separate domains with a p × a p × 5a p superstructure in Nd 0.4 Ba 0.6 FeO 3-δ , which cannot be detected by XRD, noticeably influence its thermal expansion and electrical conductivity.

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“…It can generate power in solid oxide fuel cell (SOFC) mode and produce fuel from electricity in solid oxide electrolysis cell (SOEC) mode. , The RSOC system provides an efficient and environmentally friendly power generation method that uses fuels such as hydrogen and hydrocarbons. At the same time, on the basis of existing infrastructure, excess renewable electricity can be converted into H 2 , CO, and other fuels. , For the H 2 –H 2 O system, once the electrical load is too large, the RSOC will convert chemical energy of H 2 into electrical energy and the RSOC runs in SOFC mode. If the power load is insufficient and the power is surplus, then the RSOC will operate in SOEC mode and split H 2 O into H 2 .…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, on the basis of existing infrastructure, excess renewable electricity can be converted into H 2 , CO, and other fuels. 5,6 For the H 2 −H 2 O system, once the electrical load is too large, the RSOC will convert chemical energy of H 2 into electrical energy and the RSOC runs in SOFC mode. If the power load is insufficient and the power is surplus, then the RSOC will operate in SOEC mode and split H 2 O into H 2 .…”

Section: ■ Introductionmentioning

confidence: 99%

The Performance of Ruddlesden–Popper (R-P) Structured Pr_2–xSr_xNi_0.2Mn_0.8O₄ for Reversible Single-Component Cells

Ping

Dong

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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In view of high catalytic activity and oxygen vacancy concentration, Ruddlesden−Popper (R-P) structure oxide has been widely used as the electrode material for solid oxide fuel cells (SOFCs). Herein, three R-P structure oxides, Pr 2−x Sr x Ni 0.2 Mn 0.8 O 4 (x = 1, 1.2, and 1.5), are used as the semiconductor materials of single-component cells. The materials for the oxygen side are hybrid oxides consisting of R-P structure oxide and perovskite oxide. The hydrogen side was exposed to the reduction atmosphere before the test, and the perovskite structure disappeared and the lattice parameters of the R-P structure changed, resulting in the formation of a new R-P structure and MnO 2 or NiMn alloy. In addition, Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 and reduced Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 exhibit the most content of oxygen vacancy. For a single-component fuel cell (SCFC), the cell performance increased with the decrease in Pr content. The SCFC composed of Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 shows the highest maximum power densities (P max ), which reached 206.6 mW cm −2 at 700 °C. It is because the reduced Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 has the highest catalytic activity for hydrogen oxidation reaction (HOR). Furthermore, the P max at 700 °C can reach a value of 198.1 mW cm −2 in SOFC mode, and in the case of SOEC mode, the current density at 700 °C is as high as −390.8 mA cm −2 with an applied electrolysis voltage of 1.3 V for the reversible single-component cell (RSCC) with Pr 0.5 Sr 1.5 Ni 0.2 Mn 0.8 O 4 as the semiconducting electrocatalyst.

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Cobalt-free perovskite Ba1-xNdxFeO3-δ air electrode materials for reversible solid oxide cells

Cited by 29 publications

References 41 publications

Enhancing Bifunctional Electrocatalytic Activities of La_0.5Sr_0.5Co_0.2Fe_0.8O₃ in Reversible Single-Component Cells

Enhancing Bifunctional Electrocatalytic Activities of La_0.5Sr_0.5Co_0.2Fe_0.8O₃ in Reversible Single-Component Cells

Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

The Performance of Ruddlesden–Popper (R-P) Structured Pr_2–xSr_xNi_0.2Mn_0.8O₄ for Reversible Single-Component Cells

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Cobalt-free perovskite Ba1-xNdxFeO3-δ air electrode materials for reversible solid oxide cells

Cited by 29 publications

References 41 publications

Enhancing Bifunctional Electrocatalytic Activities of La0.5Sr0.5Co0.2Fe0.8O3 in Reversible Single-Component Cells

Enhancing Bifunctional Electrocatalytic Activities of La0.5Sr0.5Co0.2Fe0.8O3 in Reversible Single-Component Cells

Phase equilibria in the Nd2O3–BaO–Fe2O3 system: Crystal structure, oxygen content, and properties of intermediate oxides

The Performance of Ruddlesden–Popper (R-P) Structured Pr2–xSrxNi0.2Mn0.8O4 for Reversible Single-Component Cells

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Enhancing Bifunctional Electrocatalytic Activities of La_0.5Sr_0.5Co_0.2Fe_0.8O₃ in Reversible Single-Component Cells

Enhancing Bifunctional Electrocatalytic Activities of La_0.5Sr_0.5Co_0.2Fe_0.8O₃ in Reversible Single-Component Cells

Phase equilibria in the Nd₂O₃–BaO–Fe₂O₃ system: Crystal structure, oxygen content, and properties of intermediate oxides

The Performance of Ruddlesden–Popper (R-P) Structured Pr_2–xSr_xNi_0.2Mn_0.8O₄ for Reversible Single-Component Cells