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.

Using In Situ High-Energy X-ray Diffraction to Quantify Electrode Behavior of Li-Ion Batteries from Extreme Fast Charging

2021 ◽  
Author(s):  
Partha P. Paul ◽  
Chuntian Cao ◽  
Vivek Thampy ◽  
Hans-Georg Steinrück ◽  
Tanvir R. Tanim ◽  
...  
Keyword(s):  
High Energy ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fast Charging ◽  
Li Ion

Phase Transformation Behavior and Stability of LiNiO 2 Cathode Material for Li‐Ion Batteries Obtained from In Situ Gas Analysis and Operando X‐Ray Diffraction

ChemSusChem ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 2240-2250 ◽  
Author(s):  
Lea de Biasi ◽  
Alexander Schiele ◽  
Maria Roca‐Ayats ◽  
Grecia Garcia ◽  
Torsten Brezesinski ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Cathode Material ◽  
Gas Analysis ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Transformation Behavior ◽  
X Ray ◽  
Phase Transformation Behavior ◽  
Li Ion

Gold model anodes for Li-ion batteries: Single crystalline systems studied by in situ X-ray diffraction

2008 ◽  
Vol 53 (21) ◽  
pp. 6064-6069 ◽  
Author(s):  
F.U. Renner ◽  
H. Kageyama ◽  
Z. Siroma ◽  
M. Shikano ◽  
S. Schöder ◽  
...  
Keyword(s):  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Single Crystalline ◽  
X Ray ◽  
Li Ion

Thermal stability of charged LiNi0.5Co0.2Mn0.3O2 cathode for Li-ion batteries investigated by synchrotron based in situ X-ray diffraction

2013 ◽  
Vol 562 ◽  
pp. 219-223 ◽  
Author(s):  
Yong-Hun Cho ◽  
Donghyuk Jang ◽  
Jeongbae Yoon ◽  
Hyunchul Kim ◽  
Tae Kyu Ahn ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Li Ion ◽  
Thermal Stability Of

Operando X-ray diffraction and X-ray absorption studies of the structural transformation upon cycling excess Li layered oxide Li[Li1/18Co1/6Ni1/3Mn4/9]O2 in Li ion batteries

2015 ◽  
Vol 3 (16) ◽  
pp. 8613-8626 ◽  
Author(s):  
Ching-Hsiang Chen ◽  
Chun-Jern Pan ◽  
Wei-Nien Su ◽  
John Rick ◽  
Chih-Jen Wang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Lithium Ions ◽  
X Ray ◽  
Oxygen Ions ◽  
Surface Electronic Structure ◽  
Absorption Studies ◽  
Li Ion ◽  
X Ray Absorption

Co helps maintain the lithium ions stably in the transition metal inter slabs and the surface electronic structure of oxygen ions is reversible during cycling between 4.6 V and 2.5 V.

scholarly journals A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1885
Author(s):  
Xinyu Wu ◽  
Feng Yang ◽  
Jian Gan ◽  
Zhangqian Kong ◽  
Yan Wu
Keyword(s):  
Stearic Acid ◽  
Antibacterial Properties ◽  
Alkali Resistance ◽  
Poplar Wood ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Acid And Alkali Resistance ◽  
The Stability

The silver particles were grown in situ on the surface of wood by the silver mirror method and modified with stearic acid to acquire a surface with superhydrophobic and antibacterial properties. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray energy spectroscopy (XPS) were used to analyze the reaction mechanism of the modification process. Scanning electron microscopy (SEM) and contact angle tests were used to characterize the wettability and surface morphology. A coating with a micro rough structure was successfully constructed by the modification of stearic acid, which imparted superhydrophobicity and antibacterial activity to poplar wood. The stability tests were performed to discuss the stability of its hydrophobic performance. The results showed that it has good mechanical properties, acid and alkali resistance, and UV stability. The durability tests demonstrated that the coating has the function of water resistance and fouling resistance and can maintain the stability of its hydrophobic properties under different temperatures of heat treatment.

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
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