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ZrP2O7-CeP2O7 solid solutions, Zr1-xCexP2O7; x = 0–0.2 and (Zr0.92Y0.08)1-yCeyP2O7; y = 0–0.1, were prepared by partially replacing Zr4+ with Ce4+ and its effect on the phase composition, sintering behavior, microstructure, and ionic conductivity is analyzed. Ce4+-doped specimens showed improved sintering behavior due to the partial reduction of Ce4+ to Ce3+, as confirmed by X-ray photoelectron spectroscopy...
Composition of (30-x) SrO-xBaO-10Al2O3-45SiO2-5B2O3-10Y2O3 (mol%) (5 ≤ x ≤ 25, in step of 5) has been synthesized using melt-quench route. The structural aspects of glasses were investigated by Fourier transform infrared (FTIR) spectroscopy. Electrical conductivity and dielectric properties of the glasses were also investigated with the help of impedance analyzer. With the increase of BaO content...
Sodium-ion-conducting poly(ethylene oxide) (PEO)-based solid polymer electrolyte films mixed with salt sodium thiocyanate (NaSCN) have been prepared by solution-cast method. Films were characterized in detail using optical microscopy, differential scanning calorimetry, and impedance spectroscopy. The drop in ionic conductivity with increasing salt concentration is supported by a decrease in number...
We report the studies on quasi-solid battery-supercapacitor (BatCap) systems fabricated using sol–gel-prepared LiFePO4 and its composites (LACs) with activated charcoal (AC) as hybrid cathode and Li4Ti5O12 powder as anode separator by flexible gel polymer electrolyte (GPE) film. The GPE film comprises 1.0 M lithium trifluoromethane sulfonate (LiTf) solution in ethylene carbonate (EC)–propylene carbonate...
In general, many attempts have been focused on enhancement of oxy-ion conductivity at intermediate temperature range in order to have a feasible operating temperature of solid oxide fuel cell (SOFC). Every effort is directed towards the creation of defect-rich structure so as to get either ion or vacancy movement, which, in turn, offers more ionic conductivity. Doping is one of the strategies where...
Ca-doped LaInO3 (LCI) has been synthesized by conventional solid-state reaction method. The structural features were investigated by X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy. The structural investigation indicated that Ca2+ dopants occupy both A- and B-sites in ABO3 (La1-xInxO3-δ). The solid solubility limit has been observed up to x = 0.10 for La1-xCaxInO3-...
Bi4 − xMxV2O11 − δ (M = La, Gd; 0.1 ≤ x ≤ 0.3) is synthesised by a solid state reaction method to study the effect of La3+ and Gd3+ substitution for Bi on the structural and optical properties. The as-prepared samples are characterised by X-ray diffraction, Fourier transform infrared analysis, UV–visible spectroscopy, scanning electron microscopy and...
This study focuses on the effect of addition of surfactant as a dispersing agent during vibratory ball milling of LiFePO4 (LFP) precursor materials on the electrochemical performance of solid-state reaction synthesized LFP for lithium-ion battery cathode material. LFP particles formed after calcinations of ball milled LFP precursors (Li2CO3, FeC2O4, and NH4H2PO4) showed better size uniformity, morphology...
Pyrochlore-structured materials are very important materials due to their structural and conducting properties. These properties can be further modified by changing processing conditions. In the present study, pyrochlore (Y2Ti2O7) is synthesized using high-energy ball milling. During various stages of ball milling, the ball-milled powder is taken for investigating the structural and thermal properties...
Composition (100−x) ZrO2 (x) Bi2O3 (x = 15, 20, 25) is synthesized by solid-state reaction method to study the effect of Bi2O3 doping on ZrO2. The as-prepared samples are characterized by various methods. The X-ray diffraction pattern of all these samples exhibits three phases, namely, m-ZrO2, βIII-Bi2O3, and γ-Bi2O3. The differential thermal analysis curves do not show any phase transition/decomposition,...
This present paper reports the study of cadmium sulphide (CdS) nanoparticles prepared under controlled condition in methanolic solution and also in polyethylene oxide polymer electrolyte matrix. The sulphurations of the cadmium salts were done in situ by a sodium sulphide solution. The concentration of the precursors has been controlled as detailed in the paper. All the preparation and characterization...
The electrical, structural, and photoelectrochemical properties of the polymer electrolyte PEO:NaI/I2 doped with an ionic liquid 1-ethyl 3-methylimidazolium dicyanamide (EMImDCN) have been reported. Incorporation of the ionic liquid (IL) increases the membrane homogeneity, decreased surface roughness, and enhances the short current (Jsc). Additionally, the doping of IL provides more charge carriers...
Synthesis temperature, during air-oxidation of manganese hydroxide, of γ-MnO2 influences performance of the protonic solid-state battery. X-ray powder diffraction analyses reveal a high degree of De Wolff disorder in samples synthesized at 40 and 60 °C, resulting in poor battery performance. The discharge profile of cell with proton-conducting solid electrolyte and composite zinc as anode, recorded...
Bi4V2O11 exists in three phases viz. α, β, and γ. High temperature γ-phase can be stabilized to room temperature owing to its higher conductivity by the partial substitution of metallic cations for vanadium in Bi4V2O11. Phase transitions from α → β and β → γ are composition and temperature-dependent. Mn2+-doped compounds Bi4V2−xMnxO11−δ (0 ≤ x ≤ 0.4) have been synthesized by solid state reaction...
Gas sensors has been currently in great demand because of serious concern over environmental pollution and public health considerations resulting from tremendous growth of industrialisation. Concurrently, there have been continuous efforts to obtain sensors with improved performance. The performance of any solid-state electrochemical gas sensor has been always rated on its response time, thermodynamic...
The solid-state proton conductor, P2O5.5H2O, is found very difficult to handle due to presence of a very high content of moisture and corrosive nature. The addition of Al2O3 and SiO2 into P2O5.5H2O, forming composite electrolytes, obviates said drawback. The Zn + ZnSO4 used as an anode to prepare cells with different cathode viz. I2, MnO2, PbO2, and V6O13 characterized under different conditions....
Samarium-doped Ceria powders for solid electrolyte ceramics were synthesized by a combustion process. Cerium nitrate and samarium nitrate were used as the starting materials, and glycine was used as fuel. Decomposition of unburned nitrogen and carbon residues was investigated by simultaneous thermogravimetry analysis and differential thermal analysis experiments. The X-ray diffraction results showed...
Ce(1−x)Gd/SmxO2−δ (x = 0.05–0.2, GDC/SDC) nanometric powder was prepared by glycine-nitrates combustion synthesis, by strictly following uniformity in the preparation route. The thermochemical properties of the obtained precursor were studied by TGA/DTA. Crystallization of the fluorite phase occurred on heating at 800 °C or higher temperature. The grain size of calcined powder was found to be about...
Electrical noise associated with ion transport (termed as “ionic noise”) has been measured at different temperatures, using a lock-in amplifier and dynamic signal analyzer for a polymer electrolyte PEO:NH4I and its CdS dispersed composite. The ionic noise suddenly increases as the polymer passes through its phase transition at Tg and Tm. The Tg-peak in the noise measurement appears more clearly...
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