Investigation of the Local Structure of the LiNi[sub 0.5]Mn[sub 0.5]O[sub 2] Cathode Material during Electrochemical Cycling by X-Ray Absorption and NMR Spectroscopy

2002 ◽  
Vol 5 (11) ◽  
pp. A263 ◽  
Author(s):  
Won-Sub Yoon ◽  
Younkee Paik ◽  
Xiao-Qing Yang ◽  
Mahalingam Balasubramanian ◽  
James McBreen ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Cathode Material ◽  
Local Structure ◽  
X Ray ◽  
Electrochemical Cycling ◽  
X Ray Absorption

Effect of Mg doping on the local structure of LiMgyCo1−yO2 cathode material investigated by X-ray absorption spectroscopy

2014 ◽  
Vol 252 ◽  
pp. 292-297 ◽  
Author(s):  
J.H. Cheng ◽  
C.J. Pan ◽  
C. Nithya ◽  
R. Thirunakaran ◽  
S. Gopukumar ◽  
...  
Keyword(s):  
Cathode Material ◽  
Absorption Spectroscopy ◽  
Local Structure ◽  
X Ray ◽  
Mg Doping ◽  
X Ray Absorption

Effects of nanostructuring on the bond strength and disorder in V2O5 cathode material for rechargeable ion-batteries

2018 ◽  
Vol 20 (22) ◽  
pp. 15288-15292 ◽  
Author(s):  
Wojciech Olszewski ◽  
Irene Isturiz ◽  
Carlo Marini ◽  
Marta Avila ◽  
Masashi Okubo ◽  
...  
Keyword(s):  
Fine Structure ◽  
Bond Strength ◽  
Cathode Material ◽  
Local Structure ◽  
Temperature Dependent ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

We have investigated the nanostructuring effects on the local structure of V2O5 cathode material by means of temperature dependent V K-edge X-ray absorption fine structure measurements.

Local structure of LiNi0.5Mn0.5O2 cathode material probed by in situ x-ray absorption spectroscopy

2006 ◽  
Vol 99 (6) ◽  
pp. 063701 ◽  
Author(s):  
Aniruddha Deb ◽  
Uwe Bergmann ◽  
Stephen P. Cramer ◽  
Elton J. Cairns
Keyword(s):  
Cathode Material ◽  
Absorption Spectroscopy ◽  
Local Structure ◽  
X Ray ◽  
Lini0.5Mn0.5O2 Cathode Material ◽  
X Ray Absorption

Application of In Situ X-ray Absorption Spectroscopy to Study Dilute Chromium Ions in a Molten Chloride Salt

2019 ◽  
Author(s):  
Jisue Moon ◽  
Carter Abney ◽  
Dmitriy Dolzhnikov ◽  
James M. Kurley ◽  
Kevin A. Beyer ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Local Structure ◽  
Chloride Salt ◽  
X Ray ◽  
Molten Chloride ◽  
Stable Species ◽  
Higher Temperature ◽  
Cr Concentration ◽  
X Ray Absorption

The local structure of dilute CrCl<sub>3</sub> in a molten MgCl<sub>2</sub>:KCl salt was investigated by <i>in situ</i> x-ray absorption spectroscopy (XAS) at temperatures from room temperature to 800<sup>o</sup>C. This constitutes the first experiment where dilute Cr speciation is explored in a molten chloride salt, ostensibly due to the compounding challenges arising from a low Cr concentration in a matrix of heavy absorbers at extreme temperatures. CrCl<sub>3</sub> was confirmed to be the stable species between 200 and 500<sup>o</sup>C, while mobility of metal ions at higher temperature (>700<sup>o</sup>C) prevented confirmation of the local structure.

scholarly journals Local Structure and Dynamics of Functional Materials Studied by X-ray Absorption Fine Structure

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1315
Author(s):  
Takafumi Miyanaga
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
Chemical Reactivity ◽  
Functional Materials ◽  
X Ray ◽  
Structure And Dynamics ◽  
Absorption Fine ◽  
Structure Phase Transition ◽  
Local Electronic Structure ◽  
X Ray Absorption

X-ray absorption fine structure (XAFS) is a powerful technique used to analyze a local electronic structure, local atomic structure, and structural dynamics. In this review, I present examples of XAFS that apply to the local structure and dynamics of functional materials: (1) structure phase transition in perovskite PbTiO3 and magnetic FeRhPd alloys; (2) nano-scaled fluctuations related to their magnetic properties in Ni–Mn alloys and Fe/Cr thin films; and (3) the Debye–Waller factors related to the chemical reactivity for catalysis in polyanions and ligand exchange reaction. This study shows that the local structure and dynamics are related to the characteristic function of the materials.

scholarly journals The Study of Magnetic Properties for Non-Magnetic Ions Doped BiFeO3

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4061
Author(s):  
Yongtao Li ◽  
Liqing Liu ◽  
Dehao Wang ◽  
Hongguang Zhang ◽  
Xuemin He ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Local Structure ◽  
Metal Ion ◽  
Single Phase ◽  
Sol Gel ◽  
X Ray ◽  
Co Doping ◽  
Magnetic Ions ◽  
X Ray Absorption ◽  
Fe Ions

BiFeO3 is considered as a single phase multiferroic. However, its magnetism is very weak. We study the magnetic properties of BiFeO3 by Cu and (Cu, Zn). Polycrystalline samples Bi(Fe0.95Cu0.05)O3 and BiFe0.95(Zn0.025Cu0.025)O3 are prepared by the sol-gel method. The magnetic properties of BiFe0.95(Zn0.025Cu0.025)O3 are greater than that of BiFeO3 and Bi(Fe0.95Cu0.05)O3. The analyses of X-ray absorption fine structure data show that the doped Cu atoms well occupy the sites of the Fe atoms. X-ray absorption near edge spectra data confirm that the valence state of Fe ions does not change. Cu and Zn metal ion co-doping has no impact on the local structure of the Fe and Bi atoms. The modification of magnetism by doping Zn can be understood by the view of the occupation site of non-magnetically active Zn2+.

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