Modified nickel oxides as cathode materials for MCFC

Daza, L.; Rangel, C. M.; Baranda, J.; Casáis, M. T.; Martinez, Mathieu; Alonso, José Antonio

doi:10.1016/s0378-7753(99)00499-1

Cited by 69 publications

(40 citation statements)

References 15 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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“…The peak shift can be explained by the introduction Li + ions into the NiO lattice and the replacement of Ni 2+ ions by Ni 3+ ions causing to the decrease in the lattice parameter and the lithiated NiO has high conductivity due to the generated hole by Li dopping. 25,40,47 The lithiation process converts Ni 2+ ions into Ni 3+ ions which can act as positive holes and Li-doped NiO cathode has the p-type semi-conductive character. 47 Consequently, the lithated NiO and LaNiO 3 surface layer for the modified cathode improve the conductivity of the cathodes which can be able to enhance the cell performance.…”

Section: Resultsmentioning

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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“…Oxides of transition metals can be used as a catalyst in wide range of industrial applications because of their electronic and magnetic properties. In this context, nickel, manganese oxides are among of these oxide are used as catalysts in different types of industrial applications [5,6]. Nickel oxide considers a p-type semiconductor and is used as a catalyst in a wide range of environ-mental applications because of their electrical properties [7,8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Catalytic Activity of NiO-Mn2O3/ZrO2 Spinel Co-Catalysts

Kadhim¹

2018

Asian J. Chem.

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The spinel co-catalyst NiO-Mn2O3/ZnO2 in two different ratios (0.5:0.5:2) and (1:2:1) of the components oxides were prepared using coprecipitation method of their metal hydroxides. This method was performed in basic medium (pH 9), using sodium carbonate as a precipitated agent. The precipitated samples dried at 120 ºC overnight and then calcinated at 650 ºC for three hours. The prepared spinel co-catalyst was investigated using powder X-ray diffraction, Fourier transfer infrared spectroscopy, energy-dispersive X-ray spectroscopy and atomic force microscopy. According to spectroscopic studies and magnetic properties, the obtained co-catalyst was a normal spinel type. The catalytic activity of prepared co-catalysts was conducted by following photocatalytic degradation of Bismarck Brown G dye. From the obtained results, the best ratio of spinel catalyst was (0.5:0.5:2) optimized, which achieved a higher activity for removal percentage (97 %) dye.

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Modified nickel oxides as cathode materials for MCFC

Cited by 69 publications

References 15 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

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

Synthesis, Characterization and Catalytic Activity of NiO-Mn2O3/ZrO2 Spinel Co-Catalysts

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