Oxygen defect engineering for Li-rich cathode material Li1.2Ni0.13Co0.13Mn0.54O2-d

2021 ◽  
Author(s):  
Takashi Nakamura ◽  
Kento Ohta ◽  
Yuta Kimura ◽  
Xueyan Hou ◽  
Yusuke Tamenori ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Cathode Material ◽  
Oxygen Defect ◽  
Defect Engineering ◽  
Anion Doping

Anion doping is considered as a promising approach to improve the battery performance by utilizing the functionalities of anion defects. Although oxygen vacancy is the simplest anion defect in oxide-based...

scholarly journals Regulating thermochemical redox temperature via oxygen defect engineering for protection of solar molten salt receivers

iScience ◽  
2021 ◽  
pp. 103039
Author(s):  
Peng Yuan ◽  
Changdong Gu ◽  
Haoran Xu ◽  
Zeyu Ning ◽  
Kefa Cen ◽  
...  
Keyword(s):  
Molten Salt ◽  
Oxygen Defect ◽  
Defect Engineering

Oxygen vacancy defect engineering using atomic layer deposited HfAlOx in multi-layered gate stack

2016 ◽  
Vol 108 (18) ◽  
pp. 183501 ◽  
Author(s):  
M. N. Bhuyian ◽  
R. Sengupta ◽  
P. Vurikiti ◽  
D. Misra
Keyword(s):  
Oxygen Vacancy ◽  
Atomic Layer ◽  
Vacancy Defect ◽  
Defect Engineering ◽  
Gate Stack

Ionic Conductivity in Laco1-XMgX03-δ: A Potential Cathode Material for Solid Oxide Fuel Cells

1995 ◽  
Vol 393 ◽  
Author(s):  
Anbin Yu ◽  
Sossina M. Haile
Keyword(s):  
Fuel Cells ◽  
Ionic Conductivity ◽  
Oxygen Vacancy ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Triple Point ◽  
Vacancy Concentration ◽  
Solid Oxide ◽  
Oxygen Vacancy Concentration ◽  
Oxide Fuel

ABSTRACTA serious concern with present designs of solid oxide fuel cells is the requirement that “triple-point junctions” exist, sites at which the cathode, electrolyte and oxidizing gas are in simultaneous contact. Only at these junctions can the cathode catalyze the reduction of oxygen into 0= ions and initiate their subsequent transport through the electrolyte. Enhanced ionic conductivity in the cathode material may increase the surface area over which reduction can take place and relax the triple-point constraint. To this end, we have examined the electrical and structural properties of LaCo1-xMgx03-δ materials under various atmospheres. Oxygen ion transport in this and related ABO3 perovskites takes place via oxygen vacancy migration. We have opted to investigate the effect of Mg doping on the transition metal site in an effort to maintain a significant oxygen vacancy concentration in oxidizing atmospheres (as would be encountered during fuel cell operation) and to isolate the effects of A- and B-site doping.

Surface oxygen vacancy and defect engineering of WO3 for improved visible light photocatalytic performance

2018 ◽  
Vol 8 (17) ◽  
pp. 4399-4406 ◽  
Author(s):  
Qi Liu ◽  
Fengjiao Wang ◽  
Huaxiang Lin ◽  
Yanyu Xie ◽  
Na Tong ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Photogenerated Electron ◽  
Vacancy Defect ◽  
Surface Oxygen ◽  
Defect Engineering ◽  
Electron Hole ◽  
Surface Oxygen Vacancy ◽  
Visible Light Photocatalytic

Compared to the pristine WO3, the oxygen vacancy defect levels of the sub-stoichiometric WO3−X narrow the bandgap and promote the separation of photogenerated electron–hole pairs.

Enhanced Photoreduction of U(VI) on WO3 Nanosheets by Oxygen Defect Engineering

2021 ◽  
pp. 129164
Author(s):  
Jia Lei ◽  
Huanhuan Liu ◽  
Changpeng Yuan ◽  
Qiang Chen ◽  
Ji-An Liu ◽  
...  
Keyword(s):  
Oxygen Defect ◽  
Defect Engineering

scholarly journals Defect-rich TiO2 in situ evolved from MXene for efficiently oxidative dehydrogenation of ethane

2020 ◽  
Author(s):  
Yanliang Zhou ◽  
Xiaoyu Li ◽  
Yicong Chai ◽  
Zihao Wu ◽  
Jian Lin ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Oxidative Dehydrogenation ◽  
High Performance ◽  
Activation Barrier ◽  
Theoretical Calculations ◽  
Oxidation Catalysis ◽  
Defect Engineering ◽  
Efficient Catalyst ◽  
Vacancy Defects

Abstract It remains a challenge to make metal oxides with limited reducibility as active component rather than support or modifier for the oxidative dehydrogenation (ODH) of light alkanes. Here, we report a special TiO2 (M-TiO2) evolved from Ti3C2Tx MXene material to be a new kind of efficient catalyst in the ODH of ethane. The reactivity on this M-TiO2 is four times higher than that on P25 TiO2, endowing an excellent ethylene productivity of 15.4 gC2H4 gcat-1 h-1 that outperforms the previously reported catalysts. Experimental characterizations and theoretical calculations reveal the existence of both Ti and oxygen vacancy defects on M-TiO2. The Ti defect can increase the reducibility of M-TiO2 to reduce the activation barrier of ethane while the oxygen vacancy facilitates the adsorption of O2 to recover lattice oxygen, accounting for the high performance. This work enlightens the defect engineering of traditional metal oxide as a promising catalyst in the oxidation catalysis.

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