Potassium phosphate monobasic induced decoration from the surface into the bulk lattice for Ni-rich cathode materials with enhanced cell performance

2020 ◽  
Vol 4 (7) ◽  
pp. 3352-3362
Author(s):  
Dianwei Zhang ◽  
Yunjiao Li ◽  
Xiaoming Xi ◽  
Shenghong Chang ◽  
Shan Wang ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Potassium Phosphate ◽  
Interfacial Instability ◽  
Cell Performance ◽  
Structural Degradation ◽  
Safety Hazard ◽  
Potassium Phosphate Monobasic ◽  
Performance Loss ◽  
Critical Challenge

The interfacial instability and intrinsic structural degradation of cathodes, which cause performance loss and even a safety hazard, are a critical challenge in Ni-rich cathodes during long-term cycling.

Cathode Performance Degradation of SOFC from Sodium Chloride

2014 ◽  
Vol 1051 ◽  
pp. 191-194
Author(s):  
Run Ru Liu ◽  
De Jun Wang ◽  
Leng Jing ◽  
Xin Yu Bai
Keyword(s):  
Sodium Chloride ◽  
Current Density ◽  
Cathode Materials ◽  
Performance Degradation ◽  
Cell Performance ◽  
Constant Current ◽  
Constant Current Density ◽  
Nacl Concentration ◽  
Poor Tolerance

Degradation of cathode induced by sodium chloride in air has been investigated for (La0.8Sr0.2)0.98MnO3(LSM). Cell performance was measured by volatilizing NaCl into the air supplied to the cathode at a constant current density of 200 mA cm-2up to 100 h. At 800 °C, an exposure to 30 ppm NaCl caused negligible degradation of LSM cathode at least for 100 h, yet degradation became obvious with increasing NaCl concentration. Slight change in the composition of the cathode materials was observed which may lead to the gradual degradation of cell performance. In addition, cell performance degradation was compared between 700 °C to 900 °C, being poisoned by 30 ppm NaCl. Degradation was negligible for the LSM cathode, while it showed slightly poor tolerance at 700 °C due to the decomposition of the cathode material. Further study should be done to clarify the long-term influence of NaCl on cathode performance.

Degradation and Performance of SOFC Cathode

2014 ◽  
Vol 672-674 ◽  
pp. 605-608
Author(s):  
Run Ru Liu ◽  
De Jun Wang ◽  
Leng Jing ◽  
Li Li Wang
Keyword(s):  
Cathode Materials ◽  
Electrochemical Reaction ◽  
Cell Performance ◽  
Chemical Degradation ◽  
Sofc Cathode ◽  
Term Stability ◽  
Long Term Stability ◽  
And Performance ◽  
Many Sources

The scope of this paper is focused on analyzing the chemical degradation of LSCF cathode induced from many sources by GCI technique both from theoretical and experimental sides. As you know, electrochemical reaction occurring in the SOFC cathode is the reduction of oxygen, therefore cathode materials for SOFC have to posses many properties. It is necessary to evaluate the performance and degradation of SOFC cathode since improvement of long-term stability is one of the major issues during SOFC commercialization process. This research is important toward the commercialization of SOFC because efforts are being made to clarify the mechanisms of cell performance degradation and to improve durability effectively.

Physical activity and cognitive function in older persons

2016 ◽  
Vol 64 (2) ◽  
Keyword(s):  
Physical Activity ◽  
Cognitive Impairment ◽  
Cognitive Function ◽  
Executive Functions ◽  
Cognitive Aging ◽  
Clinical Studies ◽  
Older Persons ◽  
Positive Effects ◽  
Critical Challenge

Strategies to improve cognitive aging are highly needed. Among those, promotion of exercise and physical activity appears as one of the most attractive and beneficial intervention. Indeed, results from basic and clinical studies suggest that exercise and physical activity have positive effects on cognition in older persons without cognitive impairment, as well as in those with dementia. Despite inconsistent results, aerobic exercise appears to have the strongest potential to enhance cognition. However, even limited periods of walking (45 minutes, three times a week, over a 6-month period) have also been shown to enhance cognition, particularly executive functions. Changing long-term lifestyle habits in these older persons remains a critical challenge and attractive programs susceptible to gain adherence are needed to succeed in achieving improved cognitive aging.

Vacuum-process-based dry transfer of active layer with solvent additive for efficient organic photovoltaic devices

2017 ◽  
Vol 5 (5) ◽  
pp. 1106-1112 ◽  
Author(s):  
Jong Hwa Lee ◽  
Kang Min Kim ◽  
Woongsik Jang ◽  
Sunyong Ahn ◽  
Young Yun Kim ◽  
...  
Keyword(s):  
Active Layer ◽  
Photovoltaic Cell ◽  
Cell Performance ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Organic Photovoltaic Cell ◽  
Long Term Stability ◽  
Solvent Additive

PTB7:PC71BM-based organic photovoltaic cell with solvent additive fabricated by transferring a BHJ layer via stamping transfer. This photovoltaic cell exhibited enhanced long-term stability and similar cell performance as compared with those of the spin-coated cells.

Coke-free operation of an all porous solid oxide fuel cell (AP-SOFC) used as an O2 supply device

2015 ◽  
Vol 3 (6) ◽  
pp. 2684-2689 ◽  
Author(s):  
Y. M. Guo ◽  
G. Largiller ◽  
C. Guizard ◽  
C. Tardivat ◽  
D. Farrusseng
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Coke Formation ◽  
Solid Oxide ◽  
Operational Stability ◽  
Porous Solid ◽  
Cell Performance ◽  
Oxide Fuel ◽  
O2 Supply

An anode-supported AP-SOFC with long-term operational stability was developed to improve cell performance over 14 times without any coke formation.

Evaluation of the structural degradation and damage of steel of steam pipelines subjected to the long-term action of thermomechanical factors

1997 ◽  
Vol 33 (2) ◽  
pp. 232-237
Author(s):  
O. V. Vol'demarov ◽  
V. Sijacki-Zeravcic ◽  
I. R. Dzioba ◽  
M. Radovic ◽  
E. Kovacevic
Keyword(s):  
Structural Degradation

Suppressing structural degradation of Ni-rich cathode materials towards improved cycling stability enabled by a Li2MnO3 coating

2020 ◽  
Vol 8 (34) ◽  
pp. 17429-17441 ◽  
Author(s):  
Xue Huang ◽  
Wenchang Zhu ◽  
Junyi Yao ◽  
Liangmin Bu ◽  
Xiangyi Li ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Cycling Stability ◽  
Structural Degradation

In situ XRD examinations demonstrate significant effects of a Li2MnO3 coating on suppressing structural degradation during charging/discharging of Ni-rich cathode materials for enhanced cycling stability.

scholarly journals Chemical stability and long-term cell performance of low-cobalt, Ni-Rich cathodes prepared by aqueous processing for high-energy Li-Ion batteries

2020 ◽  
Vol 24 ◽  
pp. 188-197 ◽  
Author(s):  
Marissa Wood ◽  
Jianlin Li ◽  
Rose E. Ruther ◽  
Zhijia Du ◽  
Ethan C. Self ◽  
...  
Keyword(s):  
Chemical Stability ◽  
High Energy ◽  
Cell Performance ◽  
Li Ion Batteries ◽  
Aqueous Processing ◽  
Li Ion

Excellent long-term electrochemical performance of graphite oxide as cathode materials for lithium-ion batteries

Ionics ◽  
2017 ◽  
Vol 23 (11) ◽  
pp. 3023-3029 ◽  
Author(s):  
Chunmiao Yan ◽  
Zhen Zhang ◽  
Zongze Liu ◽  
Yameng Liu ◽  
Songping Wu
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Graphite Oxide ◽  
Cathode Materials ◽  
Lithium Ion
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