Improving intermediate temperature performance of Ni-YSZ cermet anodes for solid oxide fuel cells by liquid infiltration of nickel nanoparticles

Lu, Yanchen; Gasper, Paul; Pal, Uday B.; Gopalan, Srikanth; Basu, Soumendra N.

doi:10.1016/j.jpowsour.2018.06.027

Cited by 46 publications

(28 citation statements)

References 33 publications

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“…Solid oxide fuel cells (SOFCs) have received considerable attention during the past decades because of their high energy efficiency, low emissions, and fuel flexibility. [ 1 ] Conventional SOFCs based on oxygen‐ion‐conducting Y 0.16 Zr 0.84 O 1.92 (YSZ) electrolyte (O‐SOFCs), typically operate at temperatures above 800 °C, [ 2 ] which introduces several important drawbacks, including high material, system, and operation costs, challenging cell component compatibility, difficult sealing, and poor operational stability. Proton‐conducting SOFCs (also called protonic ceramic fuel cells, PCFCs) can address these issues due to their lower operation temperatures (350–650 °C).…”

Section: Introductionmentioning

confidence: 99%

Realizing Simultaneous Detrimental Reactions Suppression and Multiple Benefits Generation from Nickel Doping toward Improved Protonic Ceramic Fuel Cell Performance

Song

Chen

Yang

et al. 2022

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efficiency, low emissions, and fuel flexi bility. [1] Conventional SOFCs based on oxygenionconducting Y 0.16 Zr 0.84 O 1.92 (YSZ) electrolyte (OSOFCs), typically operate at temperatures above 800 °C, [2] which introduces several important draw backs, including high material, system, and operation costs, challenging cell com ponent compatibility, difficult sealing, and poor operational stability. Proton conducting SOFCs (also called protonic ceramic fuel cells, PCFCs) can address these issues due to their lower operation temperatures (350-650 °C). [3] The lower activation energy for proton conduction in oxides compared to oxygen conduc tion ensures a sufficiently high proton conductivity in the electrolyte at reduced temperatures. [4] Despite their great promise, the reported power outputs of PCFCs are still inferior to those of OSOFCs. One of the main reasons is the poor sintering of the electrolyte that introduces large grain boundary resistance. [3b] In addi tion, the phase reactions between NiO and cermet anode/ electrolyte during the cell fabrication process has an addi tional detrimental effect on the proton conductivity of the electrolyte. [5] As a result, for most of the reported PCFCs, the Anode-supported protonic ceramic fuel cells (PCFCs) are highly promising and efficient energy conversion systems. However, several challenges need to be overcome before these systems are used more widely, including the poor sintering of recently developed proton-conducting oxides and the decreased proton conductivity due to detrimental reactions between the nickel from anode and the electrolyte occurring during high-temperature co-sintering. Herein, a Ni doping strategy to increase the electrolyte sintering, suppress the detrimental phase reactions, and generate stable Ni nanoparticles for enhanced performance is proposed. A nickel-doped perovskite oxide is developed with the nominal composition of Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 0.95 Ni 0.05 O 3−δ . Acting as a sintering aid, such a small amount of nickel effectively improves the sintering of the electrolyte. Concomitantly, reactions between nickel and the Ni-doped ceramic phase are suppressed, turning detrimental phase reactions into benefits. The nickel doping further promotes the formation of Ni nanoparticles, which enhance the electrocatalytic activity of the anode toward the hydrogen oxidation reaction and improve the charge transfer across the anode-electrolyte interface. As a result, highly efficient PCFCs are developed. The innovative anode developed in this work also shows favorable activity toward ammonia decomposition, making it highly promising for use in direct ammonia fuel cells.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202200450.

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Section: Introductionmentioning

confidence: 99%

Realizing Simultaneous Detrimental Reactions Suppression and Multiple Benefits Generation from Nickel Doping toward Improved Protonic Ceramic Fuel Cell Performance

Song

Chen

Yang

et al. 2022

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“…Hanifi et al 19 reported an improved performance in both fuel cell and electrolyzer modes with LSM infiltrated YSZ as an oxygen electrode and samarium‐doped ceria (SDC) infiltrated Ni/YSZ as a fuel electrode. Lu et al 20 indicated that infiltration of Ni nanoparticles into NiO/YSZ anodes can also increase the cell performance due to improved electrochemical reaction sites. Fan et al 21 infiltrated La 0.2 Sr 0.8 TiO 3 nanofiber scaffolds with GDC as an SOFC anode.…”

Section: Introductionmentioning

confidence: 99%

Mesh patterned electrolyte supports for high‐performance solid oxide fuel cells

Timurkutluk

Altan

Onbilgin

et al. 2022

Intl J of Energy Research

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In this study, the surface of solid oxide fuel cell electrolyte is decorated with different patterns by mesh pressing to improve the cell performance by increasing the surface area of electrolyte-electrode interfaces. Six various woven and unwoven metal meshes with different mesh gaps are considered in this respect. The patterned electrolyte surfaces are scanned by a profilometer to obtain the surface properties created by each mesh. Electrolyte supported cells are fabricated and tested to investigate the effects of electrolyte surface patterning on the cell performance. A cell with a flat electrolyte support is also manufactured and tested as a reference case. Impedance analyses are performed for a detailed examination beside microstructural observations via a scanning electron microscope. Under the same lamination conditions, woven meshes provide surface patterns with relatively higher average roughness values. Among the cases studied, the cell treated with a woven mesh having 0.57-mm wire diameter and 2-mm mesh gap on a side exhibits the highest maximum performance of 0.626 W cm À2 at 800 C, whereas that of the reference cell is only 0.320 W cm À2 , indicating that the performance of the reference cell can be almost doubled by the simple method suggested in this study. The impedance results show that the improvement in the cell performances is due to reduced electrode polarizations and ohmic resistance via mesh pressing, resulted from increased surface area of electrode-electrolyte interfaces and partially reduced electrolyte thickness as confirmed by microstructural observations, respectively.

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“…One alternative route reported for fabricating Ni-YSZ composite anodes is infiltration. ,− In this technique, a liquid precursor containing Ni cations is deposited onto a porous YSZ scaffold layer, which is then infiltrated into the porous structure through capillary action. The liquid Ni precursor in the scaffold is then decomposed to form solid NiO, the morphology of which depends strongly on the nature of the precursor .…”

Section: Introductionmentioning

confidence: 99%

Formation, Performance, and Long-Term Stability of Nanostructured Ni-YSZ Thin Film Electrodes

Bilbey

Sezen

Ow‐Yang

et al. 2021

ACS Appl. Energy Mater.

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Nickel and yttria-stabilized zirconia (YSZ) composite anodes were fabricated by a powder-free, polymeric precursor-based process, in which Ni, Y, and Zr cations are redistributed by phase separation at the nanoscale, forming YSZ and Ni(O). Transmission electron microscopy/energy-dispersive X-ray spectroscopy analyses revealed for the first-time in the literature that the nanocomposite thin film Ni-YSZ anodes had microstructures consisting of alternating Ni and YSZ nanolayers. A pre-calcination step applied in the oxidized state enhanced the interconnectivity of the Ni and YSZ phases after reduction, which improved the electrochemical performance. Electrochemical and microstructural analyses showed that performance degradation upon long-term exposure to dilute hydrogen at 600 °C was closely related to Ni coarsening in general. Evidently, the pre-calcination step enhanced the performance stability of the anodes by strengthening the YSZ network and thus inhibiting Ni agglomeration. In addition, the deposition of a thin, electronically conductive CeO 2 overlayer on top of the Ni-YSZ anode inhibited the excessive agglomeration of Ni at the top surface. Our experiments showed that the pre-calcination of Ni-YSZ anodes in the oxidized state with a CeO 2 overlayer gave the highest electrocatalytic performance, i.e., a polarization resistance of 0.72 Ω•cm 2 at 600 °C, in dilute hydrogen, as well as the highest long-term performance stability.

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Improving intermediate temperature performance of Ni-YSZ cermet anodes for solid oxide fuel cells by liquid infiltration of nickel nanoparticles

Cited by 46 publications

References 33 publications

Realizing Simultaneous Detrimental Reactions Suppression and Multiple Benefits Generation from Nickel Doping toward Improved Protonic Ceramic Fuel Cell Performance

Realizing Simultaneous Detrimental Reactions Suppression and Multiple Benefits Generation from Nickel Doping toward Improved Protonic Ceramic Fuel Cell Performance

Mesh patterned electrolyte supports for high‐performance solid oxide fuel cells

Formation, Performance, and Long-Term Stability of Nanostructured Ni-YSZ Thin Film Electrodes

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