Identification of LixSn Phase Transitions During Lithiation of Tin Nanoparticle-Based Negative Electrodes from Ex Situ 119Sn MAS NMR and Operando 7Li NMR and XRD

2021 ◽  
Author(s):  
Joop E. Frerichs ◽  
Mirco Ruttert ◽  
Steffen Böckmann ◽  
Martin Winter ◽  
Tobias Placke ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Mas Nmr ◽  
Ex Situ ◽  
7Li Nmr ◽  
Negative Electrodes

scholarly journals Preparation, Thermal, and Physical Properties of Perovskite-Type (C3H7NH3)2CdCl4 Crystals

Crystals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 108 ◽  
Author(s):  
Ae Lim ◽  
Sun Kim
Keyword(s):  
Phase Transitions ◽  
Physical Properties ◽  
Relaxation Times ◽  
Magic Angle Spinning ◽  
Mas Nmr ◽  
Spin Lattice Relaxation ◽  
Magic Angle ◽  
Scanning Calorimetry ◽  
Two Phase ◽  
Perovskite Type

To investigate the thermal and physical properties of perovskite-type (C3H7NH3)2CdCl4, its temperature-dependent chemical shifts and spin–lattice relaxation times are measured using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), magic angle spinning nuclear magnetic resonance (MAS NMR), and static NMR methods. Above 300 K, two phase transitions are observed at 398 K and 538 K. Each proton and carbon in the (C3H7NH3) cation is distinguished in the MAS NMR results. The environments around 1H, 13C, and 14N do not change with temperature according to the NMR spectra. In contrast, the resonance frequency of 113Cd in the CdCl6 octahedra decreases with increasing temperature, indicating an environmental change. The uniaxial rotations for 1H and 13C have high mobility at both high and low temperatures, and these are related to the phase transitions. In addition, the molecular motion of 113Cd in the anion becomes activated upon raising the temperature.

scholarly journals Preparation of Oleyl Phosphate-Modified TiO2/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Masato Fujita ◽  
Naokazu Idota ◽  
Kimihiro Matsukawa ◽  
Yoshiyuki Sugahara
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Methyl Methacrylate ◽  
Rayleigh Scattering ◽  
Volume Fraction ◽  
Mas Nmr ◽  
Ex Situ ◽  
Hybrid Thin Film ◽  
Poly Methyl Methacrylate ◽  
Hybrid Thin Films

TiO2nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti–O–P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via theex situroute for investigation of their optical properties. After surface modification of TiO2NPs with oleyl phosphate, IR and13C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state31P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti–O–P bonds. The modified TiO2NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO2/PMMA hybrid thin films also showed a homogeneous dispersion of TiO2NPs, and they exhibited excellent optical transparency even though the TiO2content was 20 vol%. The refractive indices of the OP-modified TiO2/PMMA hybrid thin films changed higher with increases in TiO2volume fraction, and the hybrid thin film with 20 vol% of TiO2showed the highest refractive index (n = 1.86).

Humidity-induced phase transitions of ferric sulfate minerals studied by in situ and ex situ X-ray diffraction

2009 ◽  
Vol 94 (11-12) ◽  
pp. 1629-1637 ◽  
Author(s):  
W. Xu ◽  
N. J. Tosca ◽  
S. M. McLennan ◽  
J. B. Parise
Keyword(s):  
Phase Transitions ◽  
Ferric Sulfate ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sulfate Minerals

scholarly journals Distinguishing Individual Lipid Headgroup Mobility and Phase Transitions in Raft-Forming Lipid Mixtures with 31P MAS NMR

2006 ◽  
Vol 90 (11) ◽  
pp. 4248-4260 ◽  
Author(s):  
Gregory P. Holland ◽  
Sarah K. McIntyre ◽  
Todd M. Alam
Keyword(s):  
Phase Transitions ◽  
Mas Nmr ◽  
Lipid Mixtures ◽  
31P Mas Nmr

Structural evolution during sodium deintercalation/intercalation in Na2/3[Fe1/2Mn1/2]O2

2015 ◽  
Vol 3 (13) ◽  
pp. 6954-6961 ◽  
Author(s):  
Gurpreet Singh ◽  
Juan Miguel López del Amo ◽  
Montserrat Galceran ◽  
Sofía Pérez-Villar ◽  
Teofilo Rojo
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transitions ◽  
Structural Evolution ◽  
Ex Situ

Phase transitions occurring during the (de)intercalation of Na in Na2/3[Fe1/2Mn1/2]O2 have been examined by using in situ XRD and in situ Raman Spectroscopy along with ex situ NMR.

7Li NMR Knight Shifts in Li−Sn Compounds: MAS NMR Measurements and Correlation with DFT Calculations

2010 ◽  
Vol 114 (14) ◽  
pp. 6749-6754 ◽  
Author(s):  
Emilie Bekaert ◽  
Florent Robert ◽  
Pierre Emmanuel Lippens ◽  
Michel Ménétrier
Keyword(s):  
Dft Calculations ◽  
Mas Nmr ◽  
7Li Nmr ◽  
Knight Shifts

Recrystallization and phase transitions in a γ-TiAl-based alloy as observed by ex situ and in situ high-energy X-ray diffraction

2006 ◽  
Vol 54 (14) ◽  
pp. 3721-3735 ◽  
Author(s):  
Klaus-Dieter Liss ◽  
Arno Bartels ◽  
Helmut Clemens ◽  
Slawomir Bystrzanowski ◽  
Andreas Stark ◽  
...  
Keyword(s):  
Phase Transitions ◽  
High Energy ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document