Performance and DRT analysis of P-SOFCs fabricated using new phase inversion combined tape casting technology

Shi, Nai; Su, Feng; Huan, Daoming; Xie, Yun; Lin, Jie; Tan, Wenzhou; Peng, Ranran; Xia, Changrong; Chen, Chusheng; Lu, Yalin

doi:10.1039/c7ta04967f

Cited by 152 publications

(101 citation statements)

References 36 publications

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“…The R o value was found to be constant with the pH 2 O variation while the R p increased with an increase in pH 2 O. Although the authors proposed that this phenomena was due to the increased overpotential of the oxygen electrode, the inhibition of the rate‐limiting reactions at the anode side also had some contributions, including ionization of adsorbed hydrogen in nickel surface and its charge transfer through the Ni/BCGC interface …”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Wang

Medvedev

Shao

2018

Adv Funct Materials

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Fuel cells and electrolysis cells as important types of energy conversiondevices can be divided into groups based on the electrolyte material. However, solid oxide cells (SOCs) based on conventional oxygen-ion conductors are limited by several issues, such as high operating temperature, the difficulty of hydrogen purification from water, and inferior stability. To avoid these problems, proton-conducting oxides are proposed as electrolytes for SOCs in electrolysis and fuel cell modes. Since water vapor partial pressure (pH 2 O) is one of the main parameters determining the proton concentration in proton-conducting oxides (characteristics of which can be either improved or deteriorated), the pH 2 O control is extremely important for the optimization of the devices' performance and stability. This review provides an overview of the research progresses made for proton-conducting SOCs, especially for the impact of gas humidification on the operability and performance. Fundamental understanding of the main processes in proton-conducting SOCs and design principles for the key components are summarized and discussed. The trends, challenges, and future directions that exist in this dynamic field are also pointed out. This review will inspire interest from various disciplines and provide some useful guidelines for future development of proton-conductor-based energy storage and conversion systems.

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Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Wang

Medvedev

Shao

2018

Adv Funct Materials

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“…[1,2] The possibility to also investigate complex and unknown electrochemical systems via impedance spectroscopy turned the DRT method into a popular technique in recent impedance research. [3][4][5][6][7][8][9][10][11][12][13][14][15] However, calculat-ing DRT spectra from noisy experimental impedance data requires mathematical methods which are usually no black-box procedures. In particular, this indicates that certain preassumptions have to be made which strongly affect the calculations result.…”

Section: Introductionmentioning

confidence: 99%

Direct Access to the Optimal Regularization Parameter in Distribution of Relaxation Times Analysis

2020

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The distribution of times (DRT) method has become an important extension for electrochemical impedance investigations. Calculating the DRT is particularly advantageous for complex systems, as it yields an increased resolution in frequency domain. However, the determination of the DRT from experimental impedance data requires special mathematical effort. An often‐used method for the calculation of the DRT is the Tikhonov regularization. The quality of the result of this method depends on the choice of a suitable regularization parameter. This parameter has to be selected by the user. In a former work (N. Schlüter, S. Ernst, U. Schröder, ChemElectroChem 2019, 6, 6027–6037), we showed a method that helps to find the best regularization parameter for given impedance data. However, this test was based on repetitive impedance measurements, which have to be performed at least twice. In this paper, we optimize our previous method to assure the determination of an optimal regularization parameter from just one single impedance spectrum. Eventually, this revision saves measurement time and makes our test also applicable for less time stable measurements.

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“…To prevent concentration polarization in the anode, unique anode microstructures should be developed [87]. Plenty of studies have been done for gas diffusion accelerations, such as fabricating straight open pores, decreasing the thickness of the function layer, and infiltrating with nanocatalysts.…”

Section: Adding Catalyst Layermentioning

confidence: 99%

Review of anodic reactions in hydrocarbon fueled solid oxide fuel cells and strategies to improve anode performance and stability

Shi

Xie

Yang

et al. 2020

Mater Renew Sustain Energy

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Direct utilization of hydrocarbon fuels in solid oxide fuel cells (SOFCs) has drawn special attention for high energy conversion efficiency, low cost, and simple devices. However, when fueled with hydrocarbons, SOFCs encountered great difficulty in both performance and stability, which should be attributed to the sluggish hydrocarbon oxidizing reactions, the severe carbon deposition reactions, and the possible sulfur poisoning reactions in the anode. This review summarizes potential anode reactions in hydrocarbon-fueled SOFCs and discusses the possible anode deactivation mechanisms. Further, various strategies to improve the anode performance and stability are reviewed, including substituting alloys or increasing oxide basicity for nickel-based anodes, adopting oxide anodes, and adding catalyst layers. The advantages and challenges of each strategy are discussed. Special attention is paid on properties and models of novel oxide anodes, of which nano-metal catalysts are in-situ exsolved. The publications concerning SOFC anodes, mainly in recent 5 years, are listed and compared in this article.

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Performance and DRT analysis of P-SOFCs fabricated using new phase inversion combined tape casting technology

Abstract: Phase-inversion combined tape casting technology was applied to fabricate P-SOFCs, which demonstrated great performance for CH3OH containing fuel.

Cited by 152 publications

References 36 publications

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Direct Access to the Optimal Regularization Parameter in Distribution of Relaxation Times Analysis

Review of anodic reactions in hydrocarbon fueled solid oxide fuel cells and strategies to improve anode performance and stability

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