Electrochemical Performance of La0.7Sr0.3Cu1-xFexO3-δ as Cathode Material in IT-SOFCs

To obtain more detail information about the cathode of La0.7Sr0.3Cu1-xFexO3-δ（x= 0.1,0.3,0.5,0.7,0.9）in IT-SOFCs, the cathode material La0.7Sr0.3Cu1-xFexO3-δ（x=0.1, 0.3, 0.5, 0.7, 0.9）was synthesized by a sol-gel method. X-ray diffraction revealed it to be form a single phase of perovskite. The high temperature electrical conductivity was measured by using the four-point dc technique, and cathodic overpotential with SDC（Sm0.15Ce0.85O1.925） electrolyte support was measured by using a current-interruption technique. The investigation of electrocheimical properties suggested that La0.7Sr0.3Cu0.7Fe0.3O3-δ has the highest electrical conductivity and the lowest cathodic polarization. Using La0.7Sr0.3Cu0.7Fe0.3O3-δ as cathode and 65%NiO/SDC as anode based on SDC electrolyte one can obtain higher current density and power density at intermediate temperatures, La0.7Sr0.3Cu0.7Fe0.3O3-δ is considered to be a possible cathode adapted to IT-SOFCs.

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Electrical Properties of La0.7Sr0.3CuO3-δCathode Based on SDC-YSZ Composite Electrolyte

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.702.224 ◽

2013 ◽

Vol 702 ◽

pp. 224-228

Author(s):

Min Zhang Zheng ◽

Xiao Mei Liu

Keyword(s):

Electrical Conductivity ◽

Single Phase ◽

High Current Density ◽

Sol Gel ◽

High Current ◽

X Ray Diffraction ◽

Composite Electrolyte ◽

X Ray ◽

Cathodic Overpotential ◽

A Current

The cathode material La0.7Sr0.3CuO3-δ was synthesized by a sol-gel method. X-ray diffraction revealed it to be form a single phase of perovskite. The SDC（Sm0.15Ce0.85O1.925）was synthesized by glycine-nitrate processes. The 90%SDC and 10%YSZ powders are mixed to prepare as SDC-YSZ composite electrolyte. The high temperature electrical conductivity of La0.7Sr0.3CuO3-δ was measured by using the four-point dc technique, and cathodic overpotential with SDC-YSZ composite electrolyte support was measured by using a current-interruption technique. Using La0.7Sr0.3CuO3-δ as cathode and 65%NiO/SDC as anode based on SDC-YSZ composite electrolyte one can obtain high current density and power density at intermediate temperatures.

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Impedance Spectroscopy Study of LiTaO3 Powder Synthesized via Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.545.275 ◽

2012 ◽

Vol 545 ◽

pp. 275-278 ◽

Cited By ~ 1

Author(s):

Lili Widarti Zainuddin ◽

Norlida Kamarulzaman

Keyword(s):

Room Temperature ◽

Single Phase ◽

Sol Gel ◽

Rhombohedral Structure ◽

Spectroscopy Study ◽

X Ray Diffraction ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Impedance Spectroscopy Study

A ceramics sample of LiTaO3 was prepared using a sol-gel method. The sample is annealed at 750 °C for 48 hours. X-ray diffraction analysis indicate the formation of single phase, rhombohedral structure. An ac impedance study was used to analyse the conductivity of LiTaO3 at room temperature and at various temperatures.

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Study on optical and magnetic properties of FexNi1-xMn2O4 materials

Journal of Science Natural Science ◽

10.18173/2354-1059.2021-0007 ◽

2021 ◽

Vol 66 (1) ◽

pp. 57-64

Author(s):

Hang Pham Vu Bich ◽

Yen Nguyen Hai ◽

Mai Phung Thi Thanh ◽

Dung Dang Duc ◽

Hung Nguyen Manh ◽

...

Keyword(s):

Single Phase ◽

Sol Gel ◽

Vibrating Sample Magnetometer ◽

Raman Scattering Spectrum ◽

X Ray Diffraction ◽

X Ray ◽

Scattering Spectrum ◽

Diffraction Diagram ◽

Optical And Magnetic Properties ◽

Scanning Electron

In this study, we present the process of synthesis FexNi1-xMn2O4 (x = 0; 0.1; 0.3; 0.5; 0.7; 0.9; 1) by method sol-gel. Scanning electron microscope results shows that the particle size is about 50 nm. The X-ray diffraction diagram shows that the samples are single phase, changing structure clearly as the x ratio increases from 0 to 1. The lattice constant, the bond length also changes with x-value as shown on the Raman scattering spectrum. The results of the vibrating sample magnetometer show that the magnetism of the material FexNi1-xMn2O4 changes with the value of x and reaches a maximum in the range x from 0.5 to 0.7.

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Effect of Synthesis Conditions on the Structure and Electrochemical Properties of LiNi1/2Mn1/2O2 by Sol Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.1447 ◽

2011 ◽

Vol 399-401 ◽

pp. 1447-1450

Author(s):

Zhi Yong Yu ◽

Han Xing Liu

Keyword(s):

Electrochemical Properties ◽

Sol Gel ◽

Electrochemical Analysis ◽

X Ray Diffraction ◽

Capacity Fading ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Synthesis Conditions ◽

A Current

The layered LiNi1/2Mn1/2O2 cathode materials were synthesized by a sol gel method. The effects of calcination temperature and time on the structural and electrochemical properties of the LiNi1/2Mn1/2O2 were investigated. The prepared samples were characterized by X-ray diffraction (XRD) and electrochemical analysis. The results revealed that the layered LiNi1/2Mn1/2O2 material could be optimal synthesized at temperature of 900°C for 10h. The sample prepared under the above conditions has the highest initial discharge capacity of 151 mAh/g and showed no dramatic capacity fading during 20 cycles between 2.5-4.5V at a current rate of 20mA/g.

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Effect of Sintering Temperature on Silver-Copper Nanopaste as High Temperature Die Attach Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.795.47 ◽

2013 ◽

Vol 795 ◽

pp. 47-50 ◽

Cited By ~ 8

Author(s):

Kim Seah Tan ◽

Kuan Yew Cheong

Keyword(s):

Electrical Conductivity ◽

High Temperature ◽

Sintering Temperature ◽

Grain Structure ◽

Binder System ◽

X Ray Diffraction ◽

X Ray ◽

Silver Copper ◽

Die Attach ◽

Scanning Electron

A novel stencil-printable silver-copper (Ag-Cu) nanopaste that serves as an alternative high temperature die attach material was introduced in this study. The nanopaste was made by mixing 50 nm-sized of Ag and Cu particles with an organic binder system. Sintering temperatures, up to 450°C, were used to sinter nanopaste in air and its post sintered properties were investigated. The viscosity of nanopaste was 350,000 cps and it demonstrated a shear thinning behavior. Scanning electron microscope revealed the change of grain structure with the change in the sintering temperature. Formations of Ag97Cu3 and Ag1Cu99 compounds after sintering were confirmed with X-ray diffraction; and the electrical conductivity of the sintered nanopaste was increased with the increase of the sintering temperature. The study concluded 380°C was the optimum sintering temperature to form a well sintered nanopaste.

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Biomorphic TiO2 Ceramics Prepared from Cotton Stalk

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.526 ◽

2012 ◽

Vol 602-604 ◽

pp. 526-529

Author(s):

Qing Wang ◽

Lin Zhang ◽

Ya Hui Zhang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Phase Composition ◽

High Temperature ◽

Sol Gel ◽

Cotton Stalk ◽

X Ray Diffraction ◽

X Ray ◽

Carbon Template ◽

Scanning Electron

Biomorphic TiO2 was prepared by high temperature pyrolysis and a modified sol-gel route. The morphology and microstructure of TiO2 samples were characterized by scanning electron microscopy. The phase composition of the resulting sample was analyzed by X-ray diffraction. The results suggest that the biomorphic TiO2 mainly consists of rutile TiO2, and replicates the shape and part microstructure of the carbon template.

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Sol–gel synthesis, structural and electrical properties of Li2CoSiO4 cathode material

Functional Materials Letters ◽

10.1142/s1793604714400013 ◽

2014 ◽

Vol 07 (06) ◽

pp. 1440001 ◽

Cited By ~ 3

Author(s):

Michał Świętosławski ◽

Marcin Molenda ◽

Piotr Natkański ◽

Piotr Kuśtrowski ◽

Roman Dziembaj ◽

...

Keyword(s):

Electrical Conductivity ◽

Sol Gel ◽

Lithium Ion ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Structural And Electrical Properties ◽

Potential Alternative ◽

Sol Gel Synthesis ◽

First Time

Polyanionic cathode materials for lithium-ion batteries start to be considered as potential alternative for layered oxide materials. Among them, Li 2 CoSiO 4, characterized by outstanding capacity and working voltage, seems to be an interesting substitute for LiFePO 4 and related systems. In this work, structural and electrical investigations of Li 2 CoSiO 4 obtained by sol–gel synthesis were presented. Thermal decomposition of gel precursor was studied using EGA (FTIR)-TGA method. Chemical composition of the obtained material was confirmed using X-ray diffraction and energy-dispersive X-ray spectroscopy. The morphology of β- Li 2 CoSiO 4 was studied using transmission electron microscopy. High temperature electrical conductivity of Li 2 CoSiO 4 was measured for the first time. Activation energies of the electrical conductivity of two Li 2 CoSiO 4 polymorphs (β and γ) were determined. The room temperature electrical conductivity of those materials was estimated as well.

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Investigation on the Thermal Stability of the Compounds Y3Fe29-xCrx

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.820.71 ◽

2013 ◽

Vol 820 ◽

pp. 71-74

Author(s):

Xiao Hua Wang ◽

Wei He ◽

Ling Min Zeng

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Single Phase ◽

Binary Compound ◽

High Temperature Phase ◽

Temperature Phase ◽

Transition Elements ◽

X Ray Diffraction ◽

X Ray ◽

Thermal Stability Of

Binary compound Y3Fe29cannot be directly formed by rare earth Y and Fe and the third element M (non-iron transition elements) must be introduced to form ternary compound Y3(Fe,M)29. In this work, six alloys with compositions of the Y3Fe29-xCrx(x=1,2,3,4,5,6) were prepared and investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and differential thermal analysis (DTA). The study on the thermal stability of these compounds points to that the compoundY3(Fe,Cr)29is a high temperature phase and exists above 1100K. The alloys with single-phase of Y3(Fe,Cr)29was decomposed into Y2(Fe,Cr)17and Y(Fe,Cr)12annealed at high temperature 1100K.

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The Structure and Ferromagnetic Properties of the Single Phase Bi0.95Eu0.05Fe0.95Co0.05O3 Nanoparticles Prepared by Sol-Gel

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.512-515.1434 ◽

2012 ◽

Vol 512-515 ◽

pp. 1434-1437

Author(s):

Xing Ao Li ◽

Peng Li ◽

Yong Tao Li ◽

Jian Ping Yang ◽

Qiu Fei Bai ◽

...

Keyword(s):

Single Phase ◽

Sol Gel ◽

Mixed Valence ◽

Magnetic Characteristics ◽

X Ray Diffraction ◽

X Ray ◽

Valence States ◽

Sol Gel Process ◽

X Ray Absorption ◽

Fe Ions

Bi0.95Eu0.05Fe0.95Co0.05O3 Nanoparticles sample was prepared by sol-gel process. The microstructure of samples was analysised by X-ray diffraction(XRD), the result indicated that it was the single phase rhombohedral perovskite structure. The morphology of samples was measured by scanning electron microsopy(SEM), the SEM photograph of samples indicated that the nanoparticles of Bi0.95Eu0.05Fe0.95Co0.05O3 sample were small than that of BiFeO3. The valence states of Fe ions in the samples was analysised by the X-ray absorption spectroscopy（XAS）. The XAS of Fe2p showed that it was the mixed valence states (Fe2+ and Fe3+) of Fe ions in samples, and the binding energy of Bi0.95Eu0.05Fe0.95Co0.05O3 was bigger than that of BiFeO3.The magnetic characteristics of the samples were measured by vibrating sample magnetometer (VSM)，the results showed that the weak metamagnetism were obtained from clear hysteresis loop and the magnetic saturation reached 0.408emu/g，compared with BiFeO3 sample, the magnetic properties were signiﬁcantly enhanced.

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Synthesis, Structure and Thermophysical Properties of Phosphates MNi0.5Zr1.5(PO4)3 (M = Mg, Ca, Sr)

Eurasian Chemico-Technological Journal ◽

10.18321/ectj51 ◽

2010 ◽

Vol 12 (3,4) ◽

pp. 241 ◽

Cited By ~ 7

Author(s):

M.V. Sukhanov ◽

I.A. Schelokov ◽

V.I. Pet'kov ◽

E.R. Gobechiya ◽

Yu.K. Kabalov ◽

...

Keyword(s):

Crystal Structure ◽

Heat Capacity ◽

Thermal Expansion ◽

High Temperature ◽

Single Phase ◽

Rietveld Method ◽

Type Structure ◽

X Ray Diffraction ◽

X Ray ◽

Expansion Behavior

New phosphates MNi0.5Zr1.5(PO4)3 (M = Mg, Ca, Sr) were prepared by the precipitating method. Phosphates were characterized using X-ray powder diffraction, IR-spectroscopy and electron microprobe analyses. The crystal structure of phosphates was refined by the Rietveld method. Phosphates CaNi0.5Zr1.5(PO4)3 and SrNi0.5Zr1.5(PO4)3 are shown to have been crystallized in the NaZr2(PO4)3-type structure and the phosphate MgNi0.5Zr1.5(PO4)3 was obtained as a single-phase with Sc2(WO4)3-type structure. Heat capacity of phosphate CaNi0.5Zr1.5(PO4)3 was measured in the range 7 – 650 K and increased monotonically over the entire temperature range studied. Thermal expansion of phosphate CaNi0.5Zr1.5(PO4)3 was studied in the interval 295-1073 K by the high temperature X-ray diffraction. This phosphate is similar to the best low-expansion ceramics, such as zircon, cordierite and silica glass in thermal expansion behavior.

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