Status of carbonate fuel cell materials

Yuh, Chao‐Yi; Johnsen, Rune E.; Farooque, M.; Maru, H.C.

doi:10.1016/0378-7753(95)80001-w

Cited by 79 publications

(43 citation statements)

References 10 publications

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“…The electrochemical performance of the cathode prepared from 20 mole% LiCoO 2 composition of the system with LiFe-O 2 :NiO = 25:75, is better than that reported for LiCoO 2 cathodes and almost equal with that projected for the NiO cathode in a commercial fuel cell [24]. The study reveals the possibility of preparing cathodes suitable for the MCFC application with a considerably decreased NiO content while increasing the content of LiCoO 2 and LiFeO 2 .…”

Section: Discussionmentioning

confidence: 59%

“…This result suggests the existence of a very low contact resistance between the cathode and the current collector compared to that of LiCoO 2 cathodes. Further, the performance of this cathode is almost comparable with that projected for the NiO cathode in a commercial fuel cell (about 100 mV of total polarization loss) [24].…”

Section: Cathode Prepared From 20 Mole% Licoo 2 Composition Of System Dmentioning

confidence: 90%

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New Cathode Materials for Molten Carbonate Fuel Cells

Wijayasinghe¹,

Lagergren

Bergman

2002

Fuel Cells

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Development of alternative cathode materials, has been a main strategy for solving the cathode dissolution problem of the Molten Carbonate Fuel Cell (MCFC). Ternary compositions of LiFeO2, LiCoO2 and NiO are expected to combine some desirable properties of each component. Preliminary studies on LiFeO2‐LiCoO2‐NiO ternary compositions have shown promising characteristics for the MCFC cathode application. The aim of the present work was to develop these materials further by exploring the ternary system. It was carried out by investigating electronic conductivity and microstructure of the ternary materials and evaluating their electrochemical performance in a laboratory‐scale fuel cell. Ternary materials of two sub‐systems were investigated and the study reveals the ability of improving electrical conductivity of these ternary compositions by controlling the LiCoO2 content. The appropriate dual pore structure for a proper cathode operation could also be achieved on sintered cathodes by introducing plastic poreformers in the cathode preparation process. Electrochemical performance study of selected cathodes in the laboratory fuel cell showed promising results. The cathode prepared with 20 mole% LiCoO2 in the ternary sub‐system with LiFeO2:NiO = 25:75, resulted in an iR‐corrected polarization of 62 mV and an iR‐drop of 46 mV at a current density of 160 mAcm–2 at 650 °C.

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Section: Discussionmentioning

confidence: 59%

Section: Cathode Prepared From 20 Mole% Licoo 2 Composition Of System Dmentioning

confidence: 90%

New Cathode Materials for Molten Carbonate Fuel Cells

Wijayasinghe¹,

Lagergren

Bergman

2002

Fuel Cells

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“…Another interesting aspect related to the electrolyte composition is that of 'segregation' under the electric field action (Yuh et al, 1995). In a molten eutectic mixture of lithium and potassium carbonates, the K> mobility is higher than that of Li>.…”

Section: Alternative Researchesmentioning

confidence: 99%

The dissolution process of the NiO cathodes for molten carbonate fuel cells: state-of-the-art

Freni

Barone

Puglisi

1998

Int. J. Energy Res.

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SUMMARYIn this review article the analysis of the main problems related to the use of NiO as material for cathodes in Molten Carbonate Fuel Cells (MCFC) is reported. Thus, the most significant evidences of the mechanism of NiO dissolution have been reported as well as its correlation with the basicity of the carbonate melt, composition of the reactants gases and temperature. Some hypotheses described here have been also verified experimentally and the results of this validation are reported. In the final section, we have described the most promising alternative solutions to this problem and the advantages and shortcomings of these alternatives.1998 John Wiley & Sons, Ltd.

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“…are typically used for construction of cathode and anode current collectors and bipolar separator plates [11][12][13][14][15]. The steel components are subjected to a large polarization when they are used in the cathode side owing to the potential in which oxygen reduction reaction occurs.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

Colonmer¹,

Ganesan²,

Subramanian³

et al. 2002

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This project focused on addressing the two main problems associated with state of art Molten Carbonate Fuel Cells, namely loss of cathode active material and stainless steel current collector deterioration due to corrosion. We followed a dua l approach where in the first case we developed novel materials to replace the cathode and current collector currently used in molten carbonate fuel cells. In the second case we improved the performance of conventional cathode and current collectors through surface modification. States of art NiO cathode in MCFC undergo dissolution in the cathode melt thereby limiting the lifetime of the cell. To prevent this we deposited cobalt using an electroless deposition process. We also coated perovskite The corrosion of the current collector in the cathode side was also studied. The corrosion characteristics of both SS304 and SS304 coated with Co-Ni alloy were studied. This study confirms that surface modification of SS304 leads to the formation of complex scales with better barrier properties and better electronic conductivity at 650 o C.A three phase homogeneous model was developed to simulate the performance of the molten carbonate fuel cell cathode and the complete fuel cell. The homogeneous model is based on volume averaging of different variables in the three phases over a small volume element. This approach can be used to model porous electrodes as it represents the real system much better than the conventional agglomerate model. Using the homogeneous model the polarization characteristics of the MCFC cathode and fuel cell were studied under different operating conditions. Both the cathode and the full cell model give good fits to the experimental data.

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Status of carbonate fuel cell materials

Cited by 79 publications

References 10 publications

New Cathode Materials for Molten Carbonate Fuel Cells

New Cathode Materials for Molten Carbonate Fuel Cells

The dissolution process of the NiO cathodes for molten carbonate fuel cells: state-of-the-art

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

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