scholarly journals Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides

RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 16106-16121
Author(s):  
Subha Samanta ◽  
Anupam Maity ◽  
Alorika Chatterjee ◽  
Saurav Giri ◽  
Dipankar Chakravorty

Magnetoconductance swithching phenomenon in nanosilica glass containing dual transition metal oxide ions.

2014 ◽  
Vol 2 (12) ◽  
pp. 2266-2271 ◽  
Author(s):  
Liangzhuan Wu ◽  
Yuan Yu ◽  
Xianying Han ◽  
Yuan Zhang ◽  
Yang Zhang ◽  
...  

We report an electroless-plating-like solution deposition approach for large-area flexible thin films of crystalline transition metal oxides.


Author(s):  
Qiannan Liu ◽  
Zhe Hu ◽  
Weijie Li ◽  
Chao Zou ◽  
Huile Jin ◽  
...  

This work provides guidance on controlling anionic redox activity and finding novel high-capacity transition metal oxide cathodes for sodium-ion batteries.


2002 ◽  
Vol 726 ◽  
Author(s):  
Chai-Won Kwon ◽  
Armel Poquet ◽  
Stéphane Mornet ◽  
Guy Campet ◽  
Josik Portier ◽  
...  

AbstractOrganic-inorganic hybrid materials were synthesized for use of lithium battery electrode by two strategies: 1) core-shell strategy for tri-dimensional transition metal oxide and 2) intercalation strategy for bi-dimensional (lamellar) transition metal oxide. We choose conductive polymers as an organic component for high electric conductivity and 3d-transition metal oxides as an inorganic counterpart for large capacity and processibility. Polypyrrole/maghemite and poly(3,4-ethylenedioxythiophene) (PEDOT)/vanadium pentoxide hybrids will be presented and compared with their pristine materials for core-shell and intercalation strategies, respectively. Polypyrrole/maghemite showed an enhanced electrochemical reversibility and capacity up to ∼270 mAh/g in the potential range between 1.3 and 4.3 V vs. Li at 8 mA/g. PEDOT/vanadium pentoxide also exhibited improved reversibility and capacity up to ∼330 mAh/g at 15 mA/g between 2.0 ∼ 4.4 V vs. Li on the second discharge. XRD, IR, electron microscopy, XPS and Xray absorption spectroscopy were used to characterize the samples, and to examine oxidation state of the transition metals, doping character of the polymer and the nature of interaction between the polymer and the transition metal oxides.


1994 ◽  
Vol 369 ◽  
Author(s):  
M. M. Thackeray ◽  
E. Ferg ◽  
R. J. Gummow ◽  
A. De Kock

AbstractTransition metal oxides have been evaluated extensively in the past as cathode materials for lithium cells. The major emphasis of recent research has been to develop lithium-ion or rockingchair cells that are assembled in the discharged state with a lithiated transition metal oxide cathode and a carbon anode. Although these cells are significantly safer to use than lithium cells with metallic lithium anodes, the possibility of depositing lithium at the surface of the carbon particles at the top of charge or at high rates of charge cannot be discounted. This paper discusses some recent developments in fabricating rocking-chair cells with transition metal oxide host structures as both anode and cathode, the anode providing a relatively low voltage vs. lithium and the cathode a relatively highvoltage vs. lithium. These cells avoid the reduction and oxidation of lithium during charge and discharge and, therefore, reduce the safety hazards of lithium cells. Improved safety is gained, however, at the expense of cell voltage and specific energy.


2020 ◽  
Vol 22 (45) ◽  
pp. 26216-26222
Author(s):  
Hao Li ◽  
Jens K. Nørskov

The presence of a metal support leads to a marked enhancement of ORR/OER adsorbate binding strengths on wide bandgap transition metal oxides.


2015 ◽  
Vol 3 (1) ◽  
pp. 43-59 ◽  
Author(s):  
Yufei Zhang ◽  
Laiquan Li ◽  
Haiquan Su ◽  
Wei Huang ◽  
Xiaochen Dong

Binary transition metal oxides (BTMOs) possess higher reversible capacity, better structural stability and electronic conductivity, and have been widely studied to be novel electrode materials for supercapacitors.


2019 ◽  
Vol 43 (42) ◽  
pp. 16621-16628 ◽  
Author(s):  
Prasanta Bandyopadhyay ◽  
Rajkumar Jana ◽  
Kalishankar Bhattacharyya ◽  
Oleg I. Lebedev ◽  
Uma Dutta ◽  
...  

Schematic diagram of metal oxide–BTT interaction and the associated changes in experimental UV-Vis spectra. BTT adsorbed α-Fe2O3 is represented by red spectra, while green spectra represent BTT adsorbed NiO. Black spectra represent pure BTT spectra.


2016 ◽  
Vol 18 (42) ◽  
pp. 29064-29075 ◽  
Author(s):  
Hanshuo Liu ◽  
Matthieu Bugnet ◽  
Matteo Z. Tessaro ◽  
Kristopher J. Harris ◽  
Mark J. R. Dunham ◽  
...  

Study on the chemical and structural degradation of layered lithium transition metal oxide cathode material upon electrochemical cycling.


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