Performance of La0.8Sr0.2CoO3 coated NiO as cathodes for molten carbonate fuel cells

Ganesan, P.; Colon, Hector; Haran, Bala; Popov, Branko N.

doi:10.1016/s0378-7753(02)00621-3

Cited by 45 publications

(8 citation statements)

References 14 publications

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“…In addition, these cathodes of large size are not easily fabricated due to the brittleness of the materials. Meanwhile, several research studies have shown that modification of the NiO cathode by coating it with LiCoO 2 , LiFeO 2 , La 0.8 Sr 0.2 CoO 3 , CeO 2 or Nb 2 O 5 [3,[12][13][14][15][16][17][18][19][20][21][22], or mixing an oxide of alkali earth or transition metal [23][24][25], effectively suppresses NiO dissolution in molten carbonate with negligible performance degradation. Among those choices, the coating method is being watched with keen interest because the small amount of stabilizer deposited on the internal surface of NiO prevents NiO dissolution without the loss of electrical conductivity of the cathode.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of La0.8Sr0.2MnO3-coated NiO as cathodes for molten carbonate fuel cells

Huang

Wang

et al. 2005

J Appl Electrochem

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La 0.8 Sr 0.2 MnO 3 was coated on porous NiO cathode using a simple combustion process. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed in the cathode characterizations. The electrochemical behavior of La 0.8 Sr 0.2 MnO 3 -coated NiO cathodes (LSM-NiO) were also evaluated in a molten 62 mol%Li 2 CO 3 +38 -mol%K 2 CO 3 eutectic at 650°C under the standard cathode gas condition by electrochemical impedance spectroscopy (EIS). The impedance response of the NiO and LSM-NiO cathode at different immersion times is characterized by the presence of depressed semicircles in the high frequency range and an extension at low frequencies. Impedance analysis showed that the behavior of the developed cathode was similar to that of the conventional nickel oxide cathode. The LSM-NiO showed a lower dissolution and a better catalytic efficiency superior to the state-of-the-art NiO value. Thus the cathode prepared with coating method to coat La 0.8 Sr 0.2 MnO 3 on the surface of NiO cathode is able to reduce the solubility of NiO to lengthen the lifetime of MCFC while maintaining the advantages of NiO cathode. The LSM-NiO shows promise as an alternate cathode in molten carbonate fuel cells (MCFCs).

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Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of La0.8Sr0.2MnO3-coated NiO as cathodes for molten carbonate fuel cells

Huang

Wang

et al. 2005

J Appl Electrochem

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“…Extensive studies have been carried out by different organizations to develop alternate cathode material and/or improved electrolyte compositions to reduce cathode dissolution and enhance cell performance. LiFeO 2 , La 0.8 Sr 0.2 CoO 3 (LSC) and LiCoO 2 were earlier reported as most promising alternative materials, however, they could not satisfactorily replace the lithiated NiO in terms of cost and performance (16,17). It has been shown in the literature that improving the electrolyte basicity could reduce the NiO dissolution by >50% (18).…”

Section: Effect Of Electrolyte On Cathode Stabilitymentioning

confidence: 99%

Carbonate Fuel Cell Matrix and Electrolyte Developments

2012

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The carbonate fuel cell matrix and electrolyte are important components for performance and life stability. Significant improvements were achieved in the areas of matrix pore structure, manufacturing and electrolyte chemistry. These efforts have enabled extending cell life and reducing cost. The optimization of electrolyte composition showed 40 mV performance improvement at low temperatures and >55% reduction of NiO dissolution compared to baseline design. Investigations on electrolyte compositions, electrolyte additives and stable matrix materials continue to further enhance cell life.

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“…10 Moreover, the addition of alkaline earth metal oxide, alkaline earth metal carbonates, rare earth metal oxide, and/or rare earth metal carbonates increase the basicity of the molten carbonate electrolyte, 11,12 and simultaneously Ni dissolution decreases. [13][14][15][16][17][18][19][20][21] [31][32][33][34][35][36][37] Despite many studies related to La species for MCFC application, most of them are focused to the use of lanthanum species as an additive in molten carbonate electrolyte 11,12,14,16,17,[19][20][21]38 to decrease the dissolution of NiO by increasing the basicity of the electrolyte or perovskite oxide (La 1-x A x BO 3 ) electrodes itself. [31][32][33][34][35][36][37] Only a few studies 22,23 have been done with La-modified Ni electrode, but they just made a pellet and measured the solubility of Ni and/or impedance spectra.…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Physico-Chemical and Electrochemical Properties for Surface Modified NiO Cathode for Molten Carbonate Fuel Cells (MCFCs)

Choi¹,

Kim²,

2014

Bulletin of the Korean Chemical Society

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The nickel oxide, the most widely used cathode material for the molten carbonate fuel cell (MCFC), has several disadvantages including NiO dissolution, poor mechanical strength, and corrosion phenomena during MCFC operation. The surface modification of NiO with lanthanum maintains the advantages, such as performance and stability, and suppresses the disadvantages of NiO cathode because the modification results in the formation of LaNiO 3 phase which has high conductivity, stability, and catalytic activity. As a result, La-modified NiO cathode shows low NiO dissolution, high degree of lithiation, and mechanical strength, and high cell performance and catalytic activity in comparison with the pristine NiO. These enhanced physico-chemical and electrochemical properties and the durability in marine environment allow MCFC to marine application as a auxiliary propulsion system.

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Performance of La0.8Sr0.2CoO3 coated NiO as cathodes for molten carbonate fuel cells

Cited by 45 publications

References 14 publications

Electrochemical characterization of La0.8Sr0.2MnO3-coated NiO as cathodes for molten carbonate fuel cells

Electrochemical characterization of La0.8Sr0.2MnO3-coated NiO as cathodes for molten carbonate fuel cells

Carbonate Fuel Cell Matrix and Electrolyte Developments

The Enhanced Physico-Chemical and Electrochemical Properties for Surface Modified NiO Cathode for Molten Carbonate Fuel Cells (MCFCs)

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