scholarly journals Surface degradation of Li1–xNi0.80Co0.15Al0.05O2 cathodes: Correlating charge transfer impedance with surface phase transformations

2016 ◽  
Vol 108 (26) ◽  
pp. 263902 ◽  
Author(s):  
S. Sallis ◽  
N. Pereira ◽  
P. Mukherjee ◽  
N. F. Quackenbush ◽  
N. Faenza ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Phase Transformations ◽  
Surface Phase ◽  
Surface Degradation ◽  
Transfer Impedance

Porous diatomite-mixed 1,4,5,8-NTCDA nanowires as high-performance electrode materials for lithium-ion batteries

Nanoscale ◽  
2019 ◽  
Vol 11 (34) ◽  
pp. 15881-15891 ◽  
Author(s):  
Yong Xu ◽  
Jun Chen ◽  
Ze'en Xiao ◽  
Caixia Ou ◽  
Weixia Lv ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Rate Performance ◽  
Transfer Impedance ◽  
Lower Charge

A novel porous diatomite composite electrode composed of NTCDA nanowires exhibits lower charge transfer impedance, higher capacity and better rate performance.

scholarly journals Modelling of cutting induced surface phase transformations considering friction effects

2011 ◽  
Vol 19 ◽  
pp. 331-336 ◽  
Author(s):  
V. Schulze ◽  
J. Michna ◽  
J. Schneider ◽  
P. Gumbsch
Keyword(s):  
Phase Transformations ◽  
Surface Phase

scholarly journals Erosion Corrosion Behavior of Aluminum in Flowing Deionized Water at Various Temperatures

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 779
Author(s):  
Liangshou Hao ◽  
Feng Zheng ◽  
Xiaoping Chen ◽  
Jiayang Li ◽  
Shengping Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Water Temperature ◽  
Corrosion Current ◽  
Deionized Water ◽  
Aluminum Surface ◽  
Aluminum Electrode ◽  
Transfer Impedance ◽  
Corrosion Reaction ◽  
Erosion Corrosion ◽  
Aluminum Corrosion

To optimize the operating temperature and flow velocity of cooling water in a high voltage direct current (HVDC) thyristor valve cooling system, the erosion corrosion characteristics of aluminum electrodes in deionized water at various temperatures were studied. With increasing water temperature, the corrosion current of the aluminum electrode gradually increases and the charge transfer impedance gradually decreases, thus, the corrosion of aluminum tends to become serious. The aluminum electrode in 50 °C deionized water has the most negative corrosion potential (−0.930 V), the maximum corrosion current (1.115 × 10−6 A cm−2) and the minimum charge transfer impedance (8.828 × 10−6 Ω), thus, the aluminum corrosion at this temperature is the most serious. When the temperature of deionized water increases, the thermodynamic activity of the ions and dissolved oxygen in the deionized water increases, and the mass transfer process accelerates. Therefore, the electrochemical corrosion reaction of the aluminum surface will be accelerated. The corrosion products covering the aluminum electrode surface are mainly Al(OH)3. With increasing water temperature, the number of pits and grooves formed by corrosion on the aluminum surface increased. In this paper, the molar activation energy Ea and the equilibrium constant K of the aluminum corrosion reaction with various temperatures are calculated. This clarifies the effect of temperature on the aluminum corrosion reaction, which provides a basis for protecting aluminum from corrosion. The results of this study will contribute to research that is focused on the improvement of production techniques used for HVDC thyristor valve cooling systems.

Dynamics of the surface phase transformations in the system

1996 ◽  
Vol 363 (1-3) ◽  
pp. 289-295 ◽  
Author(s):  
Z.C. Ying ◽  
J. Wang ◽  
E.W. Plummer
Keyword(s):  
Phase Transformations ◽  
Surface Phase
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