scholarly journals Short-Range Ordering in Battery Electrode, the ‘Cation-Disordered’ Rocksalt Li1.25Nb0.25Mn0.5O2

2019 ◽  
Author(s):  
Michael Jones ◽  
Philip J. Reeves ◽  
Ieuan D. Seymour ◽  
Matthew J. Cliffe ◽  
Siân E. Dutton ◽  
...  
Keyword(s):  
Local Structure ◽  
Solid State Nmr ◽  
Cation Ordering ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Short Range Ordering ◽  
Battery Electrode ◽  
Li Ion ◽  
Battery Material

We show the occurrence of local cation ordering in Li-ion battery material Li<sub>1.25</sub>Nb<sub>0.25</sub>Mn<sub>0.5</sub>O<sub>2</sub>, previously thought to be disordered. We deduce this ordering from X-ray diffraction, and test it against neutron diffraction & PDF, magnetic susceptibility and solid state NMR evidence. We identify the nature of the ordering as having a local structure related to that of gamma-LiFeO<sub>2</sub>, determine the correlation length of such ordering, and demonstrate its significant consequences for the material's electrochemistry.

scholarly journals Short-Range Ordering in Battery Electrode, the ‘Cation-Disordered’ Rocksalt Li1.25Nb0.25Mn0.5O2

2019 ◽  
Author(s):  
Michael Jones ◽  
Philip J. Reeves ◽  
Ieuan D. Seymour ◽  
Matthew J. Cliffe ◽  
Siân E. Dutton ◽  
...  
Keyword(s):  
Local Structure ◽  
Solid State Nmr ◽  
Cation Ordering ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Short Range Ordering ◽  
Battery Electrode ◽  
Li Ion ◽  
Battery Material

We show the occurrence of local cation ordering in Li-ion battery material Li<sub>1.25</sub>Nb<sub>0.25</sub>Mn<sub>0.5</sub>O<sub>2</sub>, previously thought to be disordered. We deduce this ordering from X-ray diffraction, and test it against neutron diffraction & PDF, magnetic susceptibility and solid state NMR evidence. We identify the nature of the ordering as having a local structure related to that of gamma-LiFeO<sub>2</sub>, determine the correlation length of such ordering, and demonstrate its significant consequences for the material's electrochemistry.

scholarly journals Short-range ordering in a battery electrode, the ‘cation-disordered’ rocksalt Li1.25Nb0.25Mn0.5O2

2019 ◽  
Vol 55 (61) ◽  
pp. 9027-9030 ◽  
Author(s):  
Michael A. Jones ◽  
Philip J. Reeves ◽  
Ieuan D. Seymour ◽  
Matthew J. Cliffe ◽  
Siân E. Dutton ◽  
...  
Keyword(s):  
Correlation Length ◽  
Local Structure ◽  
Short Range ◽  
Li Ion Battery ◽  
Synthesis Conditions ◽  
Short Range Ordering ◽  
Battery Electrode ◽  
Li Ion ◽  
Battery Material

We demonstrate short-range ordering in Li-ion battery material Li1.25Nb0.25Mn0.5O2, and identify its local structure and correlation length—which is sensitive to synthesis conditions and has important consequences for the material's electrochemistry.

In situ X-ray diffraction studies of a graphite-based Li-ion battery negative electrode

1996 ◽  
Vol 63 (1) ◽  
pp. 41-45 ◽  
Author(s):  
A.H. Whitehead ◽  
K. Edström ◽  
N. Rao ◽  
J.R. Owen
Keyword(s):  
Negative Electrode ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Li Ion

Synthesis of MoO3/V2O5/C Composite as Novel Anode for Li-Ion Battery Application

2020 ◽  
Vol 20 (5) ◽  
pp. 2911-2916
Author(s):  
Zhen Zhang ◽  
Xiao Chen ◽  
Guangxue Zhang ◽  
Chuanqi Feng
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Li Ion ◽  
Battery Application

The MoO3/V2O5/C, MoO3/C and V2O5/C are synthesized by electrospinning combined with heat treatment. These samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and thermogravimetric analysis (TG) techniques. The results show that sample MoO3/V2O5/C is a composite composed from MoO3, V2O5 and carbon. It takes on morphology of the nanofibers with the diameter of 200~500 nm. The TG analysis result showed that the carbon content in the composite is about 40.63%. Electrochemical properties for these samples are studied. When current density is 0.2 A g−1, the MoO3/V2O5/C could retain the specific capacity of 737.6 mAh g−1 after 200 cycles and its coulomb efficiency is 92.99%, which proves that MoO3/V2O5/C has better electrochemical performance than that of MoO3/C and V2O5/C. The EIS and linear Warburg coefficient analysis results show that the MoO3/V2O5/C has larger Li+ diffusion coefficient and superior conductivity than those of MoO3/C or V2O5/C. So MoO3/V2O5/C is a promising anode material for lithium ion battery application.

Superlattice formation in the lithiated vanadium oxide phases Li0.67V6O13 and LiV6O13

2001 ◽  
Vol 57 (6) ◽  
pp. 759-765 ◽  
Author(s):  
Helen Björk ◽  
Sven Lidin ◽  
Torbjörn Gustafsson ◽  
John O. Thomas
Keyword(s):  
Single Crystal ◽  
Unit Cell ◽  
Double Layers ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
Lithium Ions ◽  
X Ray ◽  
Electrochemical Lithiation ◽  
Oxide Phases ◽  
Li Ion

Two new lithiated phases of V6O13 were formed by carefully tuning the temperature of electrochemical lithiation in a `coffee-bag' type Li-ion battery at 2.78 V versus Li/Li+. These were studied by single-crystal X-ray diffraction. A phase with the composition Li2/3V6O13 was obtained at 308 K with a unit cell three times the volume of the original V6O13 cell. A single crystal discharged at ambient temperature was shown to be LiV6O13 and twice the unit-cell volume of the original V6O13 cell. On lithiation, the structures retain their basic V6O13 structure of alternating single and double layers of VO6 octahedra. The lithium ions occupy chemically equivalent sites, where they coordinate fivefold to O atoms, and associate with the single layers of VO6 octahedra. The insertion of lithium causes a significant elongation of one of the V—O bonds in each structure, which expands from 1.65 to 1.89 Å; this is due to the charge reduction of a specific V atom.

Synthesis of V6O13 Flowers-Like with Control pH for Li-Ion Battery Cathodes

2016 ◽  
Vol 697 ◽  
pp. 710-713
Author(s):  
Zheng Guang Zou ◽  
Hong Xu Chen ◽  
Qi Yuan ◽  
Zhong Liang Hou
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oxalic Acid ◽  
Electrochemical Performance ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
Discharge Performance ◽  
X Ray ◽  
Li Ion ◽  
Scanning Electron

To improve electrochemical performance of Li ion battery , we synthesis flower-like V6O13 in oxalic acid solvent with HCl. The composition and morphology of the V6O13 were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements, respectively. The synthesized flowers-like V6O13 are less than 600nm in the width of the ribbon and have purity phase of the V6O13.The electrochemical performance of the flowers-like V6O13 were characterized by charge and discharge performance, EIS and CV. The flowers-like V6O13 exhibited high electrochemical performance.

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