Yttria-doped ceria anode for carbon-fueled solid oxide fuel cell

Kulkarni, Aniruddha; Giddey, Sarbjit; Badwal, S. P. S.

doi:10.1007/s10008-014-2604-y

Cited by 29 publications

(22 citation statements)

References 36 publications

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“…Effect of anode composition on fuel cell performance under He flow Co/CeO 2 anodes, respectively, which are higher to those reported for 20 mol% Yttria-doped Ceria (0.85 V) and 40 mol% Gadolinia-doped Ceria (0.91 V) Ni (2 wt.%) infiltrated anodes in DCFC studies employing activated coconut charcoal as fuel [19]. These OCV values are slightly lower than the theoretical voltage (1.0 V) expected for carbon oxidation reaction [19].…”

Section: Dcfc Performancecontrasting

confidence: 63%

“…These OCV values are slightly lower than the theoretical voltage (1.0 V) expected for carbon oxidation reaction [19]. However, theoretical OCV assumes reversible electrochemical reactions on both electrodes, gas-tightness between the anode and cathode chambers, and a completely reversible adsorption/desorption of reactants/products.…”

Section: Dcfc Performancementioning

confidence: 78%

“…These differences are mainly attributed to the presence of excess CO formed under CO 2 flow, which may lead to the partial reduction of Co/CeO 2 anode composite as well as to the better diffusion and faster electro-oxidation kinetics of CO compared to solid lignite (lower R electrode ). Assuming that the cathode polarization losses are essentially negligible compared to the ohmic resistance (since metallic Ag was employed as cathode electrode), the anode polarization contribution at 800 C under both He and CO 2 flow is lower than 65e70% of overall cell losses for an average current density of 20e30 mA cm À2 at 0.5 V. This value is higher to that reported for YDC electrodes (30%), indicating the significant limitations originated from the employed anode composites [19].…”

Section: Effect Of Carrier Gas (He or Co 2 ) On Fuel Cell Performancementioning

confidence: 89%

“…However, theoretical OCV assumes reversible electrochemical reactions on both electrodes, gas-tightness between the anode and cathode chambers, and a completely reversible adsorption/desorption of reactants/products. Nevertheless, under real work conditions, significant deviations from the ideal state would be expected [19]. Furthermore, a linear dependence of cell voltage on the developed current density is observed; as the operating temperature increases and Co loading decreases, the cell voltageecurrent slopes decrease resulting in higher power outputs.…”

Section: Dcfc Performancementioning

confidence: 92%

“…Co, Cu), exhibit adequate electronic conductivity, high oxygen storage capacity and excellent electrocatalytic activity toward the direct electro-oxidation of hydrocarbons in SOFCs, their utilization as anodes in DCFCs is limited [19]. Indeed, Cu and/or Co-Ceria materials offer an interesting combination of electronic conductivity and electrocatalytic activity in direct hydrocarbon fed SOFCs and therefore they could be promising anodes in DCFCs [20].…”

Section: Introductionmentioning

confidence: 99%

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Direct utilization of lignite coal in a Co–CeO 2 /YSZ/Ag solid oxide fuel cell

Kaklidis

Garagounis

Kyriakou

et al. 2015

International Journal of Hydrogen Energy

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Available online xxxKeywords: Direct carbon fuel cells Lignite fuel Co/CeO 2 anode Carbonates a b s t r a c t The feasibility of employing lignite coal as a fuel in a Direct Carbon Fuel Cell (DCFC) of the type: lignitejCoeCeO 2 /YSZ/Agjair is investigated. The impact of several parameters, relatedto anodic electrode composition (20, 40 and 60 wt.% Co/CeO 2 ), cell temperature (700 e800 C), carrier gas composition (CO 2 /He mixtures), and total feed flow rate (10e70 cm 3 / min), was systematically examined. The effect of molten carbonates on DCFC performance was also investigated by employing a eutectic mixture of lithium and potassium carbonates as carbon additives. In the absence of carbonates, the optimum performance (~10 mW cm À2 at 800 C), was achieved by employing 20 wt.% Co/CeO 2 as anodic electrode and pure CO 2 as purging gas. An inferior behavior was demonstrated by utilizing He instead of CO 2 atmosphere in anode compartment and by increasing purging gas flow rate.Carbonates infusion into lignite feedstock resulted in a further increase of maximum power density up to 32%. The obtained findings are discussed based also on AC impedance spectroscopy measurements, which revealed the impact of DCFC operating parameters on both ohmic and electrode resistances.

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Section: Dcfc Performancecontrasting

confidence: 63%

Section: Dcfc Performancementioning

confidence: 78%

Section: Effect Of Carrier Gas (He or Co 2 ) On Fuel Cell Performancementioning

confidence: 89%

Section: Dcfc Performancementioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Direct utilization of lignite coal in a Co–CeO 2 /YSZ/Ag solid oxide fuel cell

Kaklidis

Garagounis

Kyriakou

et al. 2015

International Journal of Hydrogen Energy

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Anodes for Carbon‐Fueled Solid Oxide Fuel Cells

Zhou

Jiao

et al. 2015

ChemElectroChem

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Solid oxide fuel cells (SOFCs) have been considered as one of the most promising technologies for high‐efficiency electrical energy generation using a variety of fuels, including hydrogen, natural gas, biogas, carbon monoxide, liquid hydrocarbons and solid carbon. Carbon‐fueled SOFCs (CF‐SOFCs) potentially have the highest volume power density because solid carbon has a fuel energy density of 23.95 kWh L−1, which is approximately 10 times higher than that of liquid hydrogen. However, the reactivity and fluid mobility of carbon is significantly lower than those of gaseous fuels; thus, CF‐SOFCs will be kinetically limited at the anode. Herein, we review the development of anodes in CF‐SOFCs from the perspective of material compositions and microstructures. Challenges and research trends based on the fundamental understanding of the materials science and engineering for anode development in CF‐SOFCs are discussed.

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