Combining In Situ Synchrotron X-Ray Diffraction and Absorption Techniques with Transmission Electron Microscopy to Study the Origin of Thermal Instability in Overcharged Cathode Materials for Lithium-Ion Batteries

2012 ◽  
Vol 23 (8) ◽  
pp. 1047-1063 ◽  
Author(s):  
Kyung-Wan Nam ◽  
Seong-Min Bak ◽  
Enyuan Hu ◽  
Xiqian Yu ◽  
Youngning Zhou ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Thermal Instability ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

In situ transmission electron microscopy observations of rechargeable lithium ion batteries

Nano Energy ◽  
2019 ◽  
Vol 56 ◽  
pp. 619-640 ◽  
Author(s):  
Justin Woods ◽  
Nabraj Bhattarai ◽  
Puskar Chapagain ◽  
Yuehai Yang ◽  
Suman Neupane
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Transmission Electron

In situ x-ray study of the γ- to α-Al2O3 phase transformation during atmospheric pressure oxidation of NiAl(110)

2006 ◽  
Vol 21 (12) ◽  
pp. 3047-3057 ◽  
Author(s):  
A. Vlad ◽  
A. Stierle ◽  
N. Kasper ◽  
H. Dosch ◽  
M. Rühle
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Orientation Relationship ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Oxidation In Air ◽  
Α Al2o3 ◽  
Underlying Substrate

The oxidation in air of NiAl(110) was investigated in the temperature range from 870 °C–1200 °C by in situ x-ray diffraction and transmission electron microscopy. Oxidation at 870 °C and 1 bar oxygen leads to the formation of an epitaxial layer of γ-alumina showing an R30° orientation relationship with respect to the underlying substrate. At oxidation temperatures between 950 °C and 1025 °C, we observed a coexistence of epitaxial γ- and polycrystalline δ-Al2O3. The α-Al2O3 starts to form at 1025 °C and the complete transformation of metastable phases to the stable α-alumina phase takes place at 1100 °C. The fcc-hcp martensitic-like transformation of the initial γ-Al2O3 to epitaxial α-Al2O3 was observed. X-ray diffraction and cross-section transmission electron microscopy proved the existence of a continuous epitaxial α-Al2O3 layer between the substrate and the polycrystalline oxide scale, having a thickness of about 150 nm. The relative orientation relationship between the epitaxial alumina and the underlying substrate was found to be NiAl(110) || α-Al2O3 (0001) and [110] NiAl || [1120].

Facile Synthesis of Tremella-Like Li3V2(PO4)3/C Composite Cathode Materials Based on Oroxylum for Use in Lithium-Ion Batteries

2020 ◽  
Vol 20 (3) ◽  
pp. 1962-1967
Author(s):  
Zhen Liu ◽  
Wei Zhou ◽  
Guilin Zeng ◽  
Yuling Zhang ◽  
Zebin Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Cathode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Potential Range ◽  
X Ray Diffraction ◽  
Immersion Method ◽  
X Ray ◽  
Transmission Electron

Oroxylum as a traditional Chinese medicine, was used as a green and novel bio-template to synthesize tremella-like Li3V2(PO4)3/C composite (LVPC) cathode materials by adopting a facile immersion method. The microstructures were analyzed by X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties were investigated by galvanostatic charge–discharge experiments. The LVPC revealed specific capacity of 95 mAh·g-1 at 1 C rate within potential range of 3.0–4.3 V. After 100 cycles at 0.2 C, the retention of discharge capacity was 96%. The modified electrochemical performance is mainly resulted from the distinct tremella-like structure.

A novel tin hybrid nano-composite with double nets of carbon matrixes as a stable anode in lithium ion batteries

2017 ◽  
Vol 53 (98) ◽  
pp. 13125-13128 ◽  
Author(s):  
Jinyun Liu ◽  
Xirong Lin ◽  
Xi Chen ◽  
Zihan Shen ◽  
Miaofang Chi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Nano Composite ◽  
Transmission Electron

A novel hybrid anode consisting of tin encapsulated by double nets is presented, which is demonstrated via in situ transmission electron microscopy.

Thermal structural stability of a multi-component olivine electrode for lithium ion batteries

CrystEngComm ◽  
2016 ◽  
Vol 18 (39) ◽  
pp. 7463-7470 ◽  
Author(s):  
Kyu-Young Park ◽  
Hyungsub Kim ◽  
Seongsu Lee ◽  
Jongsoon Kim ◽  
Jihyun Hong ◽  
...  
Keyword(s):  
High Temperature ◽  
Neutron Diffraction ◽  
Lithium Ion Batteries ◽  
Structural Stability ◽  
Cathode Materials ◽  
Structural Evolution ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
X Ray

In this paper, the structural evolution of Li(Mn1/3Fe1/3Co1/3)PO4, which is a promising multi-component olivine cathode materials, is investigated using combined in situ high-temperature X-ray diffraction and flux neutron diffraction analyses at various states of charge.

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