Phase and Microstructural Stability of Electrolyte Matrix Materials for Molten Carbonate Fuel Cells

Choi, Heon Jin; Lee, J.‐J.; Hyun, Seungjoon; Lim, Hee Chun

doi:10.1002/fuce.200900199

Cited by 27 publications

(9 citation statements)

References 9 publications

(12 reference statements)

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“…[6][7][8][9] The intense emission and high luminescence efficiency are mainly related to the combination of the host matrix and the properties of the luminescent center. [10] A wide range of compounds are suitable for this purpose, such as the aluminate group, which has been the subject of several studies in recent years. [5,11,12] In this class of materials, lithium aluminate (LiAl 5 O 8 ) is seen as a promising host as reported in several recent works.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Silva

Nascimento

et al. 2021

Physica Status Solidi (b)

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The structural and optical properties of pure and Fe‐doped LiAl5O8 are investigated using the modified sol–gel method, using anhydrous glucose as the polymerizing agent. The structural and optical properties are identified using X‐ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), and X‐ray excited optical luminescence (XEOL). The XRD diffraction patterns confirm the formation of a LiAl5O8 phase with different Fe concentrations. The effect of Fe3+ ions as a dopant on the luminescent properties of LiAl5O8 is studied and is discussed in detail. The results reveal a red emission upon excitation at 267 and 391 nm. A maximum emission intensity is observed for 1 mol% of Fe. PL and XEOL emission spectra exhibit 4T1g(4 G) → 6A1g(6S) and 4E1g + 6A1g(4 G) → 6A1g(6S) transitions typical of the Fe3+ ion. In addition, an 2 E → 4A2 transition centered at ≈714 nm is attributed to the presence of Cr3+ ions in the host lattice as a contaminant in starting materials. The coordinated Commission Internationale de l'Eclairage (CIE) is calculated from the emission spectra, and points to the possibility of applying this study as a red–pink emitting match.

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Section: Introductionmentioning

confidence: 99%

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Silva

Nascimento

et al. 2021

Physica Status Solidi (b)

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“…Therefore, a reasonable porosity and pore size distribution of the matrix is required. Generally, the porosity of the matrix is 50-70%, the pore size is less than 1 µm, and the distribution is uniform [6][7][8][9][10] .…”

Section: Preparation and Characteristics Of Mcfc Electrolyte Matrixmentioning

confidence: 99%

Development and Performance Test of Molten Carbonate Fuel Cell Stack

Zhang¹,

Lu²,

Li³

et al. 2020

Preprint

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In order to solve the problems of the preparation and matching characteristics of key materials in the development of large area and large power molten carbonate fuel cell(MCFC) stack, the assembly and test operation method of 10 kW MCFC stack is proposed. In this paper, the preparation method of matrix and electrode for large area MCFC is proposed. A 10 kW class MCFC power generation system with 120 cells and an effective area of 0.2 m2 for each cell is assembled and operated. In the constant voltage discharge test, the maximum output power is 16.51kw and the current density is greater than 95 mA/cm2. In view of many experiments and analysis, an effective online evaluation method for the baking effect of MCFC electrolyte matrix is obtained, which makes the matrix, electrode and molten salt electrolyte in the molten carbonate fuel cell body form a good match, which has an important guiding significance for improving the assembly and long-term operation of MCFC battery stack. The development and performance test method of the MCFC stack in this paper will provide effective theoretical and experimental guidance for the subsequent development of the larger MCFC power generation system, which is of great significance to promote the commercial demonstration and promotion of MCFC.

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“…LiAlO 2 has been reported to be a good candidate for carbonate fuel cells as an electrolyte matrix, as a substrate for growing GaN epitaxial film, and as a catalyst for biodiesel production . LiAlO 2 has also been used as a ceramic filler for polymer electrolytes .…”

Section: Introductionmentioning

confidence: 99%

LiAlO₂/LiAl₅O₈ Membranes Derived from Flame-Synthesized Nanopowders as a Potential Electrolyte and Coating Material for All-Solid-State Batteries

Temeche

Indris

Laine

2020

ACS Appl. Mater. Interfaces

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Recently, γ-LiAlO 2 has attracted considerable attention as a coating in Li-ion battery electrodes. However, its potential as a Li + ceramic electrolyte is limited due to its poor ionic conductivity (<10 −10 S cm −1 ). Here, we demonstrate an effective method of processing LiAlO 2 membranes (<50 μm) using nanopowders (NPs) produced via liquid-feed flame spray pyrolysis (LF-FSP). Membranes consisting of selected mixtures of lithium aluminate polymorphs and Li contents were processed by conventional tape casting of NPs followed by thermocompression of the green films (100 °C/10 kpsi/10 min). The sintered green films (1100 °C/2 h/air) present a mixture of LiAlO 2 (∼72 wt %) and LiAl 5 O 8 (∼27 wt %) phases, offering ionic conductivities (>10 −6 S cm −1 ) at ambient with an activation energy of 0.5 eV. This greatly increases their potential utility as ceramic electrolytes for all-solid-state batteries, which could simplify battery designs, significantly reduce costs, and increase their safety. Furthermore, a solid-state Li/Li 3.1 AlO 2 /Li symmetric cell was assembled and galvanostatically cycled at 0.375 mA cm −2 current density, exhibiting a transference number ≈ 1.

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Phase and Microstructural Stability of Electrolyte Matrix Materials for Molten Carbonate Fuel Cells

Cited by 27 publications

References 9 publications

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Development and Performance Test of Molten Carbonate Fuel Cell Stack

LiAlO₂/LiAl₅O₈ Membranes Derived from Flame-Synthesized Nanopowders as a Potential Electrolyte and Coating Material for All-Solid-State Batteries

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Phase and Microstructural Stability of Electrolyte Matrix Materials for Molten Carbonate Fuel Cells

Cited by 27 publications

References 9 publications

Effect of Dopant Concentrations on the Luminescent Properties of LiAl5O8:Fe Phosphors

Effect of Dopant Concentrations on the Luminescent Properties of LiAl5O8:Fe Phosphors

Development and Performance Test of Molten Carbonate Fuel Cell Stack

LiAlO2/LiAl5O8 Membranes Derived from Flame-Synthesized Nanopowders as a Potential Electrolyte and Coating Material for All-Solid-State Batteries

Contact Info

Product

Resources

About

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

Effect of Dopant Concentrations on the Luminescent Properties of LiAl₅O₈:Fe Phosphors

LiAlO₂/LiAl₅O₈ Membranes Derived from Flame-Synthesized Nanopowders as a Potential Electrolyte and Coating Material for All-Solid-State Batteries