Chemical bonding in amorphous Si-coated carbon nanotubes as anodes for Li ion batteries: a XANES study

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20226-20229 ◽  
Author(s):  
Jigang Zhou ◽  
Yongfeng Hu ◽  
Xiaolin Li ◽  
Chongmin Wang ◽  
Lucia Zuin
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Li Ion Batteries ◽  
X Ray ◽  
Electrochemical Cycling ◽  
Li Ion ◽  
Amorphous Si ◽  
Spectroscopy Studies ◽  
X Ray Absorption ◽  
Coated Carbon

The Si–O–C bonding and its evolution upon electrochemical cycling in a Si-coated carbon nanotube anode are unveiled by X-ray absorption spectroscopy studies.

Transition metal dissolution and deposition in Li-ion batteries investigated by operando X-ray absorption spectroscopy

2016 ◽  
Vol 4 (47) ◽  
pp. 18300-18305 ◽  
Author(s):  
Johannes Wandt ◽  
Anna Freiberg ◽  
Rowena Thomas ◽  
Yelena Gorlin ◽  
Armin Siebel ◽  
...  
Keyword(s):  
Transition Metal ◽  
Absorption Spectroscopy ◽  
Li Ion Batteries ◽  
Metal Dissolution ◽  
X Ray ◽  
Li Ion ◽  
Spectroscopy Studies ◽  
X Ray Absorption

Operando X-ray absorption spectroscopy studies of transition metal dissolution in Li-ion batteries.

A novel surface-sensitive X-ray absorption spectroscopic detector to study the thermal decomposition of cathode materials for Li-ion batteries

2016 ◽  
Vol 325 ◽  
pp. 79-83
Author(s):  
Takamasa Nonaka ◽  
Chikaaki Okuda ◽  
Hideaki Oka ◽  
Yusaku F. Nishimura ◽  
Yoshinari Makimura ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Cathode Materials ◽  
Li Ion Batteries ◽  
X Ray ◽  
Li Ion ◽  
X Ray Absorption

Structural complexity of layered-spinel composite electrodes for Li-ion batteries

2010 ◽  
Vol 25 (8) ◽  
pp. 1601-1616 ◽  
Author(s):  
Jordi Cabana ◽  
Christopher S. Johnson ◽  
Xiao-Qing Yang ◽  
Kyung-Yoon Chung ◽  
Won-Sub Yoon ◽  
...  
Keyword(s):  
Structural Complexity ◽  
Composite Electrodes ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Li Ion ◽  
Excess Phase ◽  
X Ray Absorption

The complexity of layered-spinel yLi2MnO3·(1 – y)Li1+xMn2–xO4 (Li:Mn = 1.2:1; 0 ≤ x ≤ 0.33; y ≥ 0.45) composites synthesized at different temperatures has been investigated by a combination of x-ray diffraction (XRD), x-ray absorption spectroscopy (XAS), and nuclear magnetic resonance (NMR). While the layered component does not change substantially between samples, an evolution of the spinel component from a high to a low lithium excess phase has been traced with temperature by comparing with data for pure Li1+xMn2–xO4. The changes that occur to the structure of the spinel component and to the average oxidation state of the manganese ions within the composite structure as lithium is electrochemically removed in a battery have been monitored using these techniques, in some cases in situ. Our 6Li NMR results constitute the first direct observation of lithium removal from Li2MnO3 and the formation of LiMnO2 upon lithium reinsertion.

Phosphorus anionic redox activity revealed by operando P K-edge X-ray absorption spectroscopy on diphosphonate-based conversion materials in Li-ion batteries

2018 ◽  
Vol 54 (39) ◽  
pp. 4939-4942 ◽  
Author(s):  
Sebastian Schmidt ◽  
Sébastien Sallard ◽  
Camelia Borca ◽  
Thomas Huthwelker ◽  
Petr Novák ◽  
...  
Keyword(s):  
Hybrid Materials ◽  
Redox Reaction ◽  
Redox Activity ◽  
Li Ion Batteries ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Conversion Materials ◽  
Li Ion ◽  
Metal Redox ◽  
X Ray Absorption

When cycling diphosphonate-based organic–inorganic hybrid materials as negative battery electrodes, specific charges exceeding the maximum for a metal redox reaction are recorded.

Operando X-ray Absorption Study of the Redox Processes Involved upon Cycling of the Li-Rich Layered Oxide Li1.20Mn0.54Co0.13Ni0.13O2 in Li Ion Batteries

2014 ◽  
Vol 118 (11) ◽  
pp. 5700-5709 ◽  
Author(s):  
H. Koga ◽  
L. Croguennec ◽  
M. Ménétrier ◽  
P. Mannessiez ◽  
F. Weill ◽  
...  
Keyword(s):  
Redox Processes ◽  
Li Ion Batteries ◽  
Absorption Study ◽  
X Ray ◽  
Layered Oxide ◽  
Li Ion ◽  
X Ray Absorption

scholarly journals Electroactive polymer/carbon nanotube hybrid materials for energy storage synthesized via a “grafting to” approach

RSC Advances ◽  
2017 ◽  
Vol 7 (28) ◽  
pp. 17301-17310 ◽  
Author(s):  
Bruno Ernould ◽  
Olivier Bertrand ◽  
Andrea Minoia ◽  
Roberto Lazzaroni ◽  
Alexandru Vlad ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Energy Storage ◽  
Hybrid Materials ◽  
Electroactive Polymer ◽  
Li Ion Batteries ◽  
Multi Walled Carbon Nanotubes ◽  
Li Ion ◽  
Walled Carbon Nanotubes

Poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) has been grafted onto multi-walled carbon nanotubes to obtain conducting organic cathodes for Li-ion batteries.

At the Heart of a Conversion Reaction: An Operando X-ray Absorption Spectroscopy Investigation of NiSb2, a Negative Electrode Material for Li-Ion Batteries

2014 ◽  
Vol 118 (48) ◽  
pp. 27772-27780 ◽  
Author(s):  
Cyril Marino ◽  
Bernard Fraisse ◽  
Manfred Womes ◽  
Claire Villevieille ◽  
Laure Monconduit ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Electrode Material ◽  
Negative Electrode ◽  
Li Ion Batteries ◽  
Conversion Reaction ◽  
X Ray ◽  
Li Ion ◽  
X Ray Absorption ◽  
Negative Electrode Material

scholarly journals Spatially Resolved Operando Synchrotron-Based X-Ray Diffraction Measurements of Ni-Rich Cathodes for Li-Ion Batteries

2022 ◽  
Vol 3 ◽  
Author(s):  
Andrew Stephen Leach ◽  
Alice V. Llewellyn ◽  
Chao Xu ◽  
Chun Tan ◽  
Thomas M. M. Heenan ◽  
...  
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
Lower Percentage ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spatially Resolved ◽  
Electrochemical Cycling ◽  
Li Ion

Understanding the performance of commercially relevant cathode materials for lithium-ion (Li-ion) batteries is vital to realize the potential of high-capacity materials for automotive applications. Of particular interest is the spatial variation of crystallographic behavior across (what can be) highly inhomogeneous electrodes. In this work, a high-resolution X-ray diffraction technique was used to obtain operando transmission measurements of Li-ion pouch cells to measure the spatial variances in the cell during electrochemical cycling. Through spatially resolved investigations of the crystallographic structures, the distribution of states of charge has been elucidated. A larger portion of the charging is accounted for by the central parts, with the edges and corners delithiating to a lesser extent for a given average electrode voltage. The cells were cycled to different upper cutoff voltages (4.2 and 4.3 V vs. graphite) and C-rates (0.5, 1, and 3C) to study the effect on the structure of the NMC811 cathode. By combining this rapid data collection method with a detailed Rietveld refinement of degraded NMC811, the spatial dependence of the degradation caused by long-term cycling (900 cycles) has also been shown. The variance shown in the pristine measurements is exaggerated in the aged cells with the edges and corners offering an even lower percentage of the charge. Measurements collected at the very edge of the cell have also highlighted the importance of electrode alignment, with a misalignment of less than 0.5 mm leading to significantly reduced electrochemical activity in that area.

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