The effect of CeO2 morphology on the electrochemical performance of the reversible solid oxide cells

Li, Ping; Dong, Runze; Jiang, Xufeng; Zhang, Shihao; Liu, Tian; Wang, Rujie; Yan, Fei; Fu, Dong

doi:10.1016/j.jelechem.2020.114513

Cited by 12 publications

(8 citation statements)

References 47 publications

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“…S-LSCF and H-LSCF have different RDS for HOR, which may be caused by different surface properties of materials. S-LSCF has a lower specific surface area, larger particle size, and lower surface oxygen vacancy concentration, which may lead to relatively difficult dissociation and desorption of H 2 on its surface, making step 1 as the RDS …”

Section: Resultsmentioning

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: Resultsmentioning

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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“…For cell fabrication, the prepared (Li/Na) 2 CO 3 (LN) and Sm 0.2 Ce 0.8 O 2 (SDC) with a weight ratio of 3:7 were mixed uniformly through a high-speed ball mill to form the SDC-LN composite material and this material was used as an ionic conductor of the RSCC and SCFC . The as-prepared SDC-LN and PSNM oxides were uniformly mixed with a weight ratio of 7:3, and then the mixed composite powders were pressed at 500 MPa to form the cell with a thickness of 0.9 mm .…”

Section: Methodsmentioning

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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“…The Avrami parameter n is determined by Equation (4). Besides, crystal growth dimensionality m is related with Avrami parameter n, which could be calculated by Matusita and Sakka equation (5). Figure 3A depicts the plots of ln( 𝛼 (𝑇 𝑝 −𝑇 0 ) 𝑛 ) versus 1∕𝑇 𝑝 in the case of n = 2, 1, 0 for Kissinger, Augis-Bennett, and Ozawa, respectively.…”

Section: Effect Of Particle Size On Crystallization Kinetics Mechanismmentioning

confidence: 99%

“…1,2 RSOC could not only be operated in solid oxide fuel cell mode directly converting chemical energy stored in fuels to electricity power, but also in solid oxide electrolysis cell mode stor-ing redundant electricity from windmills, solar cells, and waste heat from factories by electrolyzing H 2 O and CO 2 to fuels. [3][4][5][6] In order to obtain higher output/input voltage, it is necessary to build RSOC stack that cells and interconnects are jointed by seals. 7 Particularly, planar RSOC stack attracts more attention, because of high output/input power density, low electrical resistance and low manufacturing cost.…”

Section: Introductionmentioning

confidence: 99%

“…Reversible solid oxide cell (RSOC) is an electrochemical energy conversion device, having a great potential in energy storage and utilization applications 1,2 . RSOC could not only be operated in solid oxide fuel cell mode directly converting chemical energy stored in fuels to electricity power, but also in solid oxide electrolysis cell mode storing redundant electricity from windmills, solar cells, and waste heat from factories by electrolyzing H 2 O and CO 2 to fuels 3–6 . In order to obtain higher output/input voltage, it is necessary to build RSOC stack that cells and interconnects are jointed by seals 7 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of particle size distribution on crystallization behavior of glass‐based seals in reversible solid oxide cells

Tao

Feng

et al. 2022

J Am Ceram Soc.

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Reversible solid oxide cell (RSOC), integrating solid oxide fuel cell and solid oxide electrolysis cell, usually utilizes a glass material as seals. The particle size distribution of glass has a significant influence on crystallization and sintering behavior in the sealing process during RSOC operation. In this work, the effects of particle size on the non‐isothermal crystallization kinetics of BaO–ZnO–MgO–B2O3–SiO2 glass in RSOC are conducted. The crystallization behavior of glass is experimentally investigated and theoretically analyzed using Kissinger, Augis–Bennett, and Ozawa models. The values of crystallization activation energies are 164.4, 188.4, and 223.2 kJ/mol for 50, 150, and 300 μm (average particle sizes of S1, S2, and S3 glasses, respectively). The Avrami parameter (n) and dimensionality (m) of S1 glass are 0.6 and 0.7, similarly those of S2 glass were 0.9 and 0.7, corresponding to surface crystallization. However, the n and m values of S3 glass are both 1.8, suggesting that crystal growth between 1 (rod like) and 2 (plate like). Coarse glass exhibits better thermal stability and higher sluggishness to crystallize than that of fine glass. The main crystallization phases are characterized as thermally stable structure BaZn2Si2O7. Combined crystallization behavior with sintering behavior of glass, it is indicated that fine glass owns fast crystallization kinetics compared with sintering kinetics, generating a porous structure, whereas glass with larger particles crystallizes more slowly, exhibiting a relatively dense structure in RSOC operation.

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The effect of CeO2 morphology on the electrochemical performance of the reversible solid oxide cells

Cited by 12 publications

References 47 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

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

Effect of particle size distribution on crystallization behavior of glass‐based seals in reversible solid oxide cells

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The effect of CeO2 morphology on the electrochemical performance of the reversible solid oxide cells

Cited by 12 publications

References 47 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

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

Effect of particle size distribution on crystallization behavior of glass‐based seals in reversible solid oxide cells

Contact Info

Product

Resources

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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

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