In-situ structural studies of manganese spinel-based cathode materials

2017 ◽  
Vol 227 ◽  
pp. 294-302 ◽  
Author(s):  
Łukasz Kondracki ◽  
Andrzej Kulka ◽  
Anna Milewska ◽  
Janina Molenda
Keyword(s):  
Cathode Materials ◽  
Structural Studies

Structural Studies on Mitotic Spindle Fibres

1978 ◽  
Vol 36 (3) ◽  
pp. 615-626
Author(s):  
J.R. Mcintosh
Keyword(s):  
Chemical Composition ◽  
Mitotic Spindle ◽  
Structural Studies ◽  
Mitotic Apparatus ◽  
Chemical Studies ◽  
Medical Interest ◽  
Spindle Fibres

The mitotic apparatus is a structure of obvious biological and medical interest, but it has proved to be a difficult cellular machine to understand. The chemical composition of the spindle is only slightly elucidated, largely because of the difficulties in preparing useful isolates of the structure. Chemical studies of the mitotic spindle have been reviewed elsewhere (Mcintosh, 1977), and will not be discussed further here. One would think that structural studies on the mitotic apparatus (MA) in situ would be straightforward, but even with this approach there is some disagreement in the results obtained with various methods and by different investigators. In this paper I will review briefly the approaches which have been used in structural studies of the MA, pointing out the strengths and problems of each approach. I will summarize the principal findings of the different methods, and identify what seem to be fruitful avenues for further work.

scholarly journals Rapid mechanochemical synthesis of polyanionic cathode with improved electrochemical performance for Na-ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xing Shen ◽  
Quan Zhou ◽  
Miao Han ◽  
Xingguo Qi ◽  
Bo Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Mechanochemical Synthesis ◽  
Cathode Materials ◽  
Industrial Application ◽  
Synthesis Process ◽  
In Situ Fabrication ◽  
Stationary Energy ◽  
Carbon Coated

AbstractNa-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemical performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g−1 at 0.1C, higher than its theoretical capacity (130 mAh g−1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.

Structural Studies on the Effects of ZrO[sub 2] Coating on LiCoO[sub 2] during Cycling Using In Situ X-Ray Diffraction Technique

2006 ◽  
Vol 153 (11) ◽  
pp. A2152 ◽  
Author(s):  
Kyung Yoon Chung ◽  
Won-Sub Yoon ◽  
James McBreen ◽  
Xiao-Qing Yang ◽  
Si Hyoung Oh ◽  
...  
Keyword(s):  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray

The facile in situ preparation and characterization of C/FeOF/FeF3 nanocomposites as LIB cathode materials

Ionics ◽  
2017 ◽  
Vol 24 (6) ◽  
pp. 1561-1569 ◽  
Author(s):  
Wanwan Li ◽  
Yue Li ◽  
Minhua Fang ◽  
Xiaolin Yao ◽  
Tingting Li ◽  
...  
Keyword(s):  
Cathode Materials ◽  
In Situ Preparation

scholarly journals Asymmetric Pd-NHC*-catalyzed coupling reactions

2012 ◽  
Vol 84 (8) ◽  
pp. 1741-1748 ◽  
Author(s):  
E. Peter Kündig ◽  
Yixia Jia ◽  
Dmitry Katayev ◽  
Masafumi Nakanishi
Keyword(s):  
High Temperature ◽  
Coupling Reactions ◽  
Structural Studies ◽  
Methylene Unit ◽  
Asymmetric Coupling ◽  
New Applications ◽  
Very High

Very high asymmetric inductions result in the Pd-catalyzed intramolecular arylation of amides to give 3,3-disubstituted oxindoles when new in situ-generated chiral N-heterocyclic carbene (NHC*) ligands are employed. Structural studies show that conformational locking to minimize allylic strain is the key to understanding the function of these ligands. New applications of these ligands in the frontier area of asymmetric coupling reactions involving C(sp3)–H bonds are detailed. Highly enantioenriched fused indolines are accessible using either preformed- or in situ-generated Pd-NHC* catalysts. Remarkably, this occurs at high temperature (140–160 °C) via excellent asymmetric recognition of an enantiotopic C–H bond in an unactivated methylene unit.

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