scholarly journals Revealing the Structural Evolution and Phase Transformation of O3-Type NaNi1/3Fe1/3Mn1/3O2 Cathode Material on Sintering and Cycling Processes

2020 ◽  
Vol 3 (7) ◽  
pp. 6107-6114
Author(s):  
Yingying Xie ◽  
Han Gao ◽  
Ross Harder ◽  
Linsen Li ◽  
Jihyeon Gim ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Cathode Material ◽  
Structural Evolution

Improvement of the cyclic deterioration and structural evolution of Li[Li0.2Ni0.2Mn0.6]O2 cathode material by controlling initial charging voltages

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23677-23685 ◽  
Author(s):  
Wuwei Yan ◽  
Yongning Liu ◽  
Shaokun Chong ◽  
Yi-Fang Wu
Keyword(s):  
Phase Transformation ◽  
Cathode Material ◽  
Spinel Phase ◽  
Structural Evolution ◽  
Oxygen Release

The initial stepwise charging suppresses oxygen release and restrains the layered to spinel phase transformation.

scholarly journals Three-dimensional atomic-scale observation of structural evolution of cathode material in a working all-solid-state battery

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Yue Gong ◽  
Yuyang Chen ◽  
Qinghua Zhang ◽  
Fanqi Meng ◽  
Jin-An Shi ◽  
...  
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Three Dimensional ◽  
Structural Evolution ◽  
Atomic Scale ◽  
Solid State Battery

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

Optimizing the structure of layered cathode material for higher electrochemical performance by elucidating structural evolution during heat processing

Nano Energy ◽  
2020 ◽  
Vol 78 ◽  
pp. 105194 ◽  
Author(s):  
Zhongyuan Huang ◽  
Mihai Chu ◽  
Rui Wang ◽  
Weiming Zhu ◽  
Wenguang Zhao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Structural Evolution ◽  
Heat Processing

In Situ Structural Evolution of Steel-Based MMC by High Energy X-Ray Diffraction and Comparison with Micromechanical Approach

2013 ◽  
Vol 768-769 ◽  
pp. 313-320 ◽  
Author(s):  
Guillaume Geandier ◽  
Moukrane Dehmas ◽  
Mickael Mourot ◽  
Elisabeth Aeby-Gautier ◽  
Sabine Denis ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Coefficient Of Thermal Expansion ◽  
Hydrostatic Stress ◽  
Structural Evolution ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
The Matrix

In situ high energy X-ray diffraction synchrotron was used to provide direct analysis of the transformation sequences in steel-based matrix composite (MMC) reinforced with TiC particles. Evolution of the phase fractions of the matrix and TiC particles as well as the mean cell parameters of each phase were determined by Rietveld refinement from high energy X-ray diffraction (ID15B, ESRF, Grenoble, France). In addition, some peaks were further analysed in order to obtain the X-ray strain during the cooling step. Non-linear strain evolutions of each phase are evidenced, which are either associated with differences in the coefficient of thermal expansion (CTE) between matrix and TiC particle or to the occurrence of phase transformation. Micromechanical calculations were performed through the finite element method to estimate the stress state in each phase and outline the effects of differences in CTE and of volume change associated with the matrix phase transformation. The calculated results led to a final compressive hydrostatic stress in the TiC reinforcement and tensile hydrostatic stress in the matrix area around the TiC particles. Besides, the tendencies measured from in situ synchrotron diffraction (mean cell parameters) matched with the numerical estimates.

Structural evolution and the capacity fade mechanism upon long-term cycling in Li-rich cathode material

2012 ◽  
Vol 14 (37) ◽  
pp. 12875 ◽  
Author(s):  
Bohang Song ◽  
Zongwen Liu ◽  
Man On Lai ◽  
Li Lu
Keyword(s):  
Cathode Material ◽  
Structural Evolution ◽  
Capacity Fade

scholarly journals Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy

2021 ◽  
Vol 7 (14) ◽  
pp. eabe3105
Author(s):  
Hao Wang ◽  
Dengke Chen ◽  
Xianghai An ◽  
Yin Zhang ◽  
Shijie Sun ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Amorphous Phase ◽  
Structural Evolution ◽  
Crack Tip ◽  
Dislocation Slip ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Dislocation Glide ◽  
Ultrafine Grained

The Cantor high-entropy alloy (HEA) of CrMnFeCoNi is a solid solution with a face-centered cubic structure. While plastic deformation in this alloy is usually dominated by dislocation slip and deformation twinning, our in situ straining transmission electron microscopy (TEM) experiments reveal a crystalline-to-amorphous phase transformation in an ultrafine-grained Cantor alloy. We find that the crack-tip structural evolution involves a sequence of formation of the crystalline, lamellar, spotted, and amorphous patterns, which represent different proportions and organizations of the crystalline and amorphous phases. Such solid-state amorphization stems from both the high lattice friction and high grain boundary resistance to dislocation glide in ultrafine-grained microstructures. The resulting increase of crack-tip dislocation densities promotes the buildup of high stresses for triggering the crystalline-to-amorphous transformation. We also observe the formation of amorphous nanobridges in the crack wake. These amorphization processes dissipate strain energies, thereby providing effective toughening mechanisms for HEAs.

In-Situ TEM Study of Phase Transformation and Structural Evolution of Si-C Nanocomposite Anode for Lithium Ion Battery

2012 ◽  
Vol 18 (S2) ◽  
pp. 1320-1321
Author(s):  
C. Wang ◽  
M. Gu ◽  
X. Li ◽  
Z. Wang ◽  
W. Xu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Lithium Ion Battery ◽  
Structural Evolution ◽  
Lithium Ion ◽  
In Situ Tem

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

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