Compositional control of continuously graded anode functional layer

McCoppin, Jared R.; Barney, Ian T.; Mukhopadhyay, Sharmila M.; Miller, Ronald E.; Reitz, Thomas; Young, D.

doi:10.1016/j.jpowsour.2012.05.024

Cited by 17 publications

(6 citation statements)

References 14 publications

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“…Among them, the use of an anode functional layer (AFL) between the anode and the electrolyte has been studied as one of the strategies to reduce the anode polarization. In this regard, a graded AFL interlayer, which is composed of a continuously graded composition of the electrolyte [ 53 ] or sub‐micrometer‐sized NiO, [ 54 ] has been developed for enhancing the cell performance and has been validated as a reasonable modification of the microstructure. However, the manufacturing procedure of the graded AFL is complicated and time‐consuming due to the coating process required for each interlayer.…”

Section: Latest Research On Electrolyte Materials and Electrolyte/ele...mentioning

confidence: 99%

Advances in Materials and Interface Understanding in Protonic Ceramic Fuel Cells

Цветков

Kim

Jeong

et al. 2022

Adv Materials Technologies

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Protonic ceramic fuel cells (PCFCs) are promising eco‐energy electrochemical energy conversion systems that can efficiently operate in intermediate (500–700 °C) to low (500 °C) temperature ranges. In this review the most recent advances in materials research for the ceramic components of PCFCs (i.e., electrolyte, cathode, and anode) and their interface engineering are introduced. Recent approaches to improve the protonic of conductivity, and activity and stability of electrolyte and electrode materials are first presented. In addition, new attempts to stabilize/activate electrode/electrolyte interfaces and electrode surfaces are also discussed. Details of the theoretical background behind the electron and ion transfer processes at electrodes are also discussed. Finally, the challenges and perspectives of PCFC development are suggested from the point of view of materials engineering.

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Section: Latest Research On Electrolyte Materials and Electrolyte/ele...mentioning

confidence: 99%

Advances in Materials and Interface Understanding in Protonic Ceramic Fuel Cells

Цветков

Kim

Jeong

et al. 2022

Adv Materials Technologies

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“…For example, Holzer et al [24], have manufactured many electrodes by changing the particle size distribution in order to modify the TPBl density. Other experimental studies have been dedicated to optimizing electrodes with graded composition [25][26][27][28]. In these cases, the number of investigated microstructures is rather limited since the manufacturing is complex and timeconsuming.…”

Section: Introductionmentioning

confidence: 99%

Numerical microstructural optimization for the hydrogen electrode of solid oxide cells

et al. 2023

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A multiscale model has been used to optimize the microstructure of a classical hydrogen electrode made of nickel and yttria‐stabilized zirconia (Ni‐8YSZ). For this purpose, a 3D reconstruction of a reference electrode has been obtained by X‐ray nano‐holotomography. Then, a large dataset of synthetic microstructures has been generated around this reference with the truncated Gaussian random field method, varying the ratio Ni/8YSZ and the Ni particle size. All the synthetic microstructures have been introduced in a multiscale modeling approach to analyze the impact of the microstructure on the electrode and cell responses. The local electrode polarization resistance in the hydrogen electrode, as well as the complete cell impedance spectra, have been computed for the different microstructures. A significant performance improvement was found when decreasing the Ni particle size distribution. Moreover, an optimum has been identified in terms of electrode composition allowing the minimization of the cell polarization resistance. The same methodology has been also applied to assess the relevance of graded electrodes. All these results allow a better understanding of the precise role of microstructure on cell performances and provide useful guidance for cell manufacturing.

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“…At the same time, the technology for making gradient functional materials is also under continuous development. [24][25][26][27][28] McCoppin et al used pressure-assisted dual-suspension spraying technology to prepare the solid oxide fuel cell with linear combination gradient cathode functional layer structure. The microstructure of the fuel cell was investigated by SEM and EDAX region diagram.…”

mentioning

confidence: 99%

“…The results show that the gradient functional layer with a thickness of 9.8 μm has an output power of up to 1.15 W•cm −2 when operating at 800 °C. 27 McCoppin et al reported a novel linear composite gradient anode functional layer for a solid oxide fuel cell. The cell was fabricated using a computercontrolled composite aerosol deposition system.…”

mentioning

confidence: 99%

Stress Analysis of Solid Oxide Fuel Cell Electrodes Using Functional Gradient Materials

Ma¹,

Xue²,

Li³

et al. 2023

J. Electrochem. Soc.

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The differences in material properties of different components of solid oxide fuel cells cause high stresses during sintering and operation, and functional gradient material electrodes are expected to alleviate this problem. In this study, electrodes with three different material compositions are compared with electrodes using conventional materials, and the residual and thermal stresses are calculated by applying functional gradient materials to single-sided and double-sided electrodes, respectively, and the results are analyzed with the optimization goal of minimizing the stresses to find the optimal functional gradient material composition distribution. The study shows that the functional gradient material electrode can significantly reduce the interfacial stress and alleviate the local stress concentration. When using functional gradient materials for one side of the electrode, a specific material component distribution can reduce the residual stress and thermal stress on the other side, but the stresses may increase on the local side of the electrode. The interfacial stress between layers can be reduced to a maximum of 0.1 MPa when a functional gradient material with a quadratic linear distribution of components is used for both sides of the electrodes. This study has implications for the fabrication of functional gradient materials for SOFC electrodes.

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Compositional control of continuously graded anode functional layer

Cited by 17 publications

References 14 publications

Advances in Materials and Interface Understanding in Protonic Ceramic Fuel Cells

Advances in Materials and Interface Understanding in Protonic Ceramic Fuel Cells

Numerical microstructural optimization for the hydrogen electrode of solid oxide cells

Stress Analysis of Solid Oxide Fuel Cell Electrodes Using Functional Gradient Materials

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