Theoretical description on the interface-enhanced conductivity of SDC/LiNa-carbonate composite electrolytes

Yin, Shu; Ye, Zhupeng; Li, Chuanming; Chen, Xiao‐Wei; Zeng, Yanwei

doi:10.1016/j.matlet.2012.10.062

Cited by 18 publications

(5 citation statements)

References 18 publications

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“…It was shown that single cell performances were increased by the use of nanoparticles. This was consistent with the assumptions of several groups, assuming that molten carbonates/solid oxide phase interfaces, acting as "super ionic pathways", were at the origin of the conductivity enhancement; and by increasing the length of interface, the conductivity and the performances were also increased [16,17,33,34]. J. Maier justified this with the formation of a space charge layer at the interface, by an accumulation of oxide ions at the interface, as well as the metallic cations from the carbonate side [35].…”

Section: Introductionsupporting

confidence: 90%

Deeper Understanding of Ternary Eutectic Carbonates/Ceria-Based Oxide Composite Electrolyte through Thermal Cycling

et al. 2022

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Due to a high conductivity of about 0.1 S·cm−1, Li-Na-K carbonate eutectic and Sm-doped ceria composite material is a good electrolyte candidate for hybrid fuel cells operating between 500 °C and 600 °C. The present paper aims at a deeper understanding of the species and mechanisms involved in the ionic transport through impedance spectroscopy and thermal analyses, in oxidizing and reducing atmospheres, wet and dry, and during two heating/cooling cycles. Complementary structural analyses of post-mortem phases allowed us to evidence the irreversible partial transformation of molten carbonates into hydrogenated species, when water and/or hydrogen are added in the surrounding atmospheres. Furthermore, this modification was avoided by adding CO2 in anodic and/or cathodic compartments. Finally, a mechanistic model of such composite electrical behavior is suggested, according to the surrounding atmospheres used. It leads to the conclusions that cells based on this kind of electrolyte would preferably operate in molten carbonate fuel cell conditions, than in solid oxide fuel cell conditions, and confirms the name of “Hybrid Fuel Cells” instead of Intermediate Temperature (or even Low Temperature) Solid Oxide Fuel Cells.

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Section: Introductionsupporting

confidence: 90%

Deeper Understanding of Ternary Eutectic Carbonates/Ceria-Based Oxide Composite Electrolyte through Thermal Cycling

et al. 2022

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“…In this study, since our initial Li/Ni = 3:1, the excess Li compensates the loss of Li, thus resulting in the formation of a stoichiometric LiNiO 2 . Overall, from Figure , there is not a reaction either between SDC and NiO or between SDC and MC …”

Section: Resultsmentioning

confidence: 84%

Self-Formed, Mixed-Conducting, Triple-Phase Membrane for Efficient CO₂/O₂ Capture from Flue Gas and in Situ Dry-Oxy Methane Reforming

Zhang

Tong

Huang

2018

ACS Sustainable Chem. Eng.

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We report here a high-temperature, low-cost, mixed-conducting, triple-phase membrane for high-flux and selective CO2/O2 capture and in situ conversion of methane into syngas via dry-oxy methane reforming (DOMR). The membrane is composed of a porous NiO-SDC matrix filled with molten carbonate. With Ar as the sweeping gas, the membrane exhibits a CO2 and O2 flux density of 1.17 and 0.52 mL min–1 cm–2, respectively, at 850 °C. With CH4–Ar as the sweep gas and Ni0.2Mg0.8O–1 wt % Pt (NMP) as the catalyst, the in situ DOMR reaction delivers a syngas production rate of 7.4 mL min–1 cm–2 with a CH4 conversion rate of 84.1%. A long-term test of the membrane reactor shows a stable performance.

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“…All of the peaks corresponding to NiO have increased with the increase of NiO loading. Furthermore, no crystalline peaks were observed for Li 2 CO 3 and Na 2 CO 3 , which indicate that the carbonate layer covering the SDC particles exists in the amorphous state without influencing the structure of SDC [19].…”

Section: Resultsmentioning

confidence: 93%

Preparation of Nickel Oxide-Samarium-Doped Ceria Carbonate Composite Anode Powders by Using High-Energy Ball Milling for Low-Temperature Solid Oxide Fuel Cells

Hoa

Rahman

Somalu

2016

MSF

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The characteristics of the starting powder in powder preparation method are important for enhancement of cell performance. In this study, the composite anode powders of NiO–samarium-doped ceria carbonates (SDCC) were prepared by using different NiO loadings (50–70 wt.%) via high-energy ball milling. The composite anode powders were ball-milled in ethanol at a milling speed of 550 rpm. The obtained NiO–SDCC composite anode powders were characterized by XRD, FTIR, FESEM, and EDS. Results indicate that the composite anode powders demonstrated good chemical compatibility between NiO and SDCC, given that no new phases were detected in the XRD analysis. FTIR spectra confirmed that the composite anode powders contain carbonates in amorphous state after high-energy ball milling. FESEM investigation revealed well-distributed fine particles and significant reduction of particle size at nanoscale compared with the powder prepared using NiO particles as the starting material. EDS mapping verified the homogeneity of the composite powder with good elemental distribution. Thus, high-energy ball milling is an effective method to prepare NiO–SDCC composite anode powders within a relatively short processing time.

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Theoretical description on the interface-enhanced conductivity of SDC/LiNa-carbonate composite electrolytes

Cited by 18 publications

References 18 publications

Deeper Understanding of Ternary Eutectic Carbonates/Ceria-Based Oxide Composite Electrolyte through Thermal Cycling

Deeper Understanding of Ternary Eutectic Carbonates/Ceria-Based Oxide Composite Electrolyte through Thermal Cycling

Self-Formed, Mixed-Conducting, Triple-Phase Membrane for Efficient CO₂/O₂ Capture from Flue Gas and in Situ Dry-Oxy Methane Reforming

Preparation of Nickel Oxide-Samarium-Doped Ceria Carbonate Composite Anode Powders by Using High-Energy Ball Milling for Low-Temperature Solid Oxide Fuel Cells

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Theoretical description on the interface-enhanced conductivity of SDC/LiNa-carbonate composite electrolytes

Cited by 18 publications

References 18 publications

Deeper Understanding of Ternary Eutectic Carbonates/Ceria-Based Oxide Composite Electrolyte through Thermal Cycling

Deeper Understanding of Ternary Eutectic Carbonates/Ceria-Based Oxide Composite Electrolyte through Thermal Cycling

Self-Formed, Mixed-Conducting, Triple-Phase Membrane for Efficient CO2/O2 Capture from Flue Gas and in Situ Dry-Oxy Methane Reforming

Preparation of Nickel Oxide-Samarium-Doped Ceria Carbonate Composite Anode Powders by Using High-Energy Ball Milling for Low-Temperature Solid Oxide Fuel Cells

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Product

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Self-Formed, Mixed-Conducting, Triple-Phase Membrane for Efficient CO₂/O₂ Capture from Flue Gas and in Situ Dry-Oxy Methane Reforming