Remarkable lowering in the synthesis temperature of LiMn2O4via citrate solution–gel synthesis facilitated by ethanol

2017 ◽  
Vol 46 (43) ◽  
pp. 14934-14946 ◽  
Author(s):  
G. Maino ◽  
R. Carleer ◽  
W. Marchal ◽  
G. Bonneux ◽  
A. Hardy ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cathode Materials ◽  
Synthesis Temperature ◽  
Citrate Solution ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Thermal Budget ◽  
Synthesis Routes

Low temperature synthesis routes for cathode materials, such as LMO, are currently very important. Here, through an elaborate study on the chemistry behind the precursor and EtOH interaction, the thermal budget was drastically reduced at 250 °C.

scholarly journals Carbon dioxide and water incorporation mechanisms in SrFeO3−δ phases: a computational study

2020 ◽  
Vol 22 (43) ◽  
pp. 25146-25155
Author(s):  
L. J. Ford ◽  
P. R. Slater ◽  
J. K. Christie ◽  
P. Goddard
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cell ◽  
Low Temperature ◽  
Solid Oxide Fuel Cell ◽  
Computational Study ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Synthesis Routes

With a higher propensity for low temperature synthesis routes along with a move toward lower solid oxide fuel cell operating temperatures, water and carbon dioxide incorporation in strontium ferrite is of importance.

A general low-temperature synthesis route to polyanionic vanadium phosphate fluoride cathode materials: AVPO4F (A = Li, Na, K) and Na3V2(PO4)2F3

2019 ◽  
Vol 3 (10) ◽  
pp. 2164-2174 ◽  
Author(s):  
Nicolas Goubard-Bretesché ◽  
Erhard Kemnitz ◽  
Nicola Pinna
Keyword(s):  
Low Temperature ◽  
Cathode Materials ◽  
Vanadium Phosphate ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Wet Chemistry ◽  
Synthesis Route

A versatile wet chemistry route is reported for the synthesis of highly pure (Li, Na, K)VPO4F and Na3V2(PO4)2F3 cathode materials.

Sol–gel-assisted, fast and low-temperature synthesis of La-doped Li3V2(PO4)3/C cathode materials for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 17924-17930 ◽  
Author(s):  
Zhenyu Yang ◽  
Jinhuo Hu ◽  
Zhengyu Chen ◽  
Jing Zhong ◽  
Ningyu Gu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cathode Materials ◽  
Sol Gel ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Low Temperature Sintering ◽  
Sintering Process ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
La Doped

La-doped Li3V2(PO4)3/C cathode materials are synthesized by a sol–gel-assisted, low-temperature sintering process. The resulting cathode has a stable specific capacity of 160 mA h g−1 at 0.2 C, and retained a stable capacity of up to 116 mA h g−1 at 5 C.

Low-temperature Synthesis Routes of Alkali-metal Molybdenum Bronzes

1999 ◽  
Vol 28 (8) ◽  
pp. 811-812 ◽  
Author(s):  
Kazuo Eda ◽  
Kin Chin ◽  
M. Stanley Whittingham
Keyword(s):  
Low Temperature ◽  
Alkali Metal ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Synthesis Routes

scholarly journals Low Temperature Synthesis of Aegirine NaFeSi2O6: Spectroscopy (57Fe Mössbauer, Raman) and Size/Strain Analysis from X-ray Powder Diffraction

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 444 ◽  
Author(s):  
Günther J. Redhammer ◽  
Julian Weber ◽  
Gerold Tippelt ◽  
Gregor A. Zickler ◽  
Andreas Reyer
Keyword(s):  
Low Temperature ◽  
Crystallite Size ◽  
Synthesis Temperature ◽  
X Ray Diffraction ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
X Ray ◽  
Cell Parameters ◽  
57Fe Mössbauer ◽  
Phase Pure

Using a low temperature synthesis protocol, it was possible to obtain phase-pure synthetic aegirine (NaFeSi2O6) at temperatures as low as 130 °C, albeit only with rather long synthesis times of ~200 h; at 155 °C, a nano-crystallite shaped phase-pure material is formed after 24 h. These are, to the best of our knowledge, the lowest temperatures reported so far for phase-pure aegirine synthesis. Powder X-ray diffraction (PXRD) was used to characterize phase purity, structural state and microstructural properties (size and strain) of the as-synthesized (130–230 °C) and heat treated (300–900 °C) samples, via Rietveld analysis of powder patterns. Melting was observed at 999 °C. With increasing synthesis temperature, crystallite size linearly increased from 10 nm to 30 nm at 230 °C, while unit cell parameters decreased. The microstrain was very small. Additional heat treatment of as synthesized samples showed that the crystallite size remained rather unaffected up to 700 °C. The lattice parameters, however, already changed at low temperatures and successively became smaller, indicating increasing ordering towards more regular arrangements of building units. This was confirmed by 57Fe Mössbauer spectroscopy, where a distinct decrease of the quadrupole splitting with increasing synthesis temperature was found. Finally, Raman spectroscopy showed that some weakly-developed pre-ordering effects were present in the samples, which appeared to be amorphous in PXRD, while well-resolved spectra appeared as soon as the long-range ordered crystalline state could be found with X-ray diffraction.

Modified Synthesis Temperature of Ba3 Co1.7 Ni0.1 Cu0.1 Mn0.1 Fe24 O41 Z-Type Ferrite Nanoparticles Prepared by Co-Precipitation Method

2013 ◽  
Vol 829 ◽  
pp. 737-741 ◽  
Author(s):  
Mohammad Javad Pourhosseini Asl ◽  
Ali Ghasemi ◽  
Gholam Reza Gordani
Keyword(s):  
Low Temperature ◽  
Synthesis Temperature ◽  
Precipitation Method ◽  
Diffraction Field ◽  
X Ray Diffraction ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Optimum Synthesis ◽  
Different Temperatures ◽  
Co Precipitation

In this study, the low temperature synthesis of barium-Z type hexaferrite nanoparticles was considered. In this manner, the Z-type hexaferrite with the chemical composition of Ba3 Co1.7 Ni0.1 Cu0.1 Mn0.1 Fe24 O41 was synthesized at different temperatures of 900, 1000 and 1100 0C for 3hr. An X-Ray diffraction, field emission scanning electron microscopy (FE-SEM) and a vibrating sample magnetometer (VSM) analysis were carried out to investigate structural and magnetic properties of samples. XRD results showed that the Z-type ferrite phase was formed in all samples. However, At the low temperature synthesis (T=900 0C), the Ba2Me2Fe12O22 and BaFe2O4 phases were also detected. FE-SEM micrographs showed that with increasing the synthesis temperature, the particle size was increased. It was found that the saturation of magnetization was slightly increased from 54 to 55. 5emugr with an increase in synthesis temperature from 900 to 11000C, while the coercivity increased initially from 670 Oe to 860 Oe and then decreased to 488 Oe. The results also indicated that the temperature of 10000C was the optimum synthesis temperature of Ba-Z type hexaferrite nanoparticles, which was much lower than that of Z-type hexaferrite produced by previous researchers.

scholarly journals Tialit- and mullite-tialite containing ceramic in the MgO—SiO2—Al2O3—TiO2 system based on domestic raw materials

2017 ◽  
Vol 117 ◽  
pp. 185-195
Author(s):  
M. Yu. Lisyutkina ◽  
M. I. Ryschenko ◽  
E. Yu. Fedorenko ◽  
K. B. Daineko ◽  
A. V. Shevtsov
Keyword(s):  
Mathematical Modeling ◽  
Low Temperature ◽  
Performance Indicators ◽  
High Performance ◽  
Raw Materials ◽  
Synthesis Temperature ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Properties Of Materials ◽  
Functional Ceramics

The aim of the paper is to justify the choice of the region of the system MgO—Al2O3—TiO2—SiO2, which is promising for the production of functional ceramics under conditions of low temperature synthesis. The structure of the A3S2—M2A2S5—AT—S tetrahedron in detail is considered (Тe = 1400 °C), it found that the minimum eutectic of this region is four-component. Compositions based on the above-mentioned tetrahedron are promising for the synthesis of chemically and thermally stable ceramics. Optimization of tialite and mullite-tialite ceramics at a synthesis temperature of 1250 °C has been carried out while maintaining the ratio MgO : TiO2 = 0.18 in the raw mixtures. The dependencies of the properties of materials on the compositions of the ceramic masses were received by mathematical modeling. Mass compositions of functional ceramics in conditions of low-temperature synthesis with high performance indicators have been developing.

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