scholarly journals A new dimensionless group for the estimation of the current density distribution in an electrochemical cell

2005 ◽  
Vol 70 (2) ◽  
pp. 251-253 ◽  
Author(s):  
Konstantin Popov ◽  
S.M. Pesic ◽  
Predrag Zivkovic
Keyword(s):  
Density Distribution ◽  
Current Density ◽  
Electrochemical Cell ◽  
Cell Voltage ◽  
Current Density Distribution ◽  
Dimensionless Group ◽  
The Absolute

Anew dimensionless group for the estimation of the current density distribution in an electrochemical cell is defined as the ratio of the sum of the absolute values of the anodic and cathodic over potentials to the overall cell voltage.

scholarly journals The effect of electrodeposition process parameters on the current density distribution in an electrochemical cell

2001 ◽  
Vol 66 (2) ◽  
pp. 131-137
Author(s):  
K.I. Popov ◽  
R.M. Stevanovic ◽  
P.M. Zivkovic
Keyword(s):  
Density Distribution ◽  
Current Distribution ◽  
Current Density ◽  
Electrochemical Cell ◽  
Common Knowledge ◽  
Cell Voltage ◽  
Current Density Distribution ◽  
Deposition Process ◽  
Exchange Current ◽  
Diffusion Control

Cell voltage - current density dependences for a model electrochemical cell of fixed geometry were calculated for different electrolyte conductivities, Tafel slopes and cathodic exchange current densities. The ratio between the current density at the part of the cathode nearest to the anode and the one furthest away were taken as a measure for the estimation of the current density distribution. The calculations reveal that increasing the conductivity of the electrolyte, as well as increasing the cathodic Tafel slope should both improve the current density distribution. Also, the distribution should be better under total activation control or total diffusion control rather than at mixed activation- diffusion-Ohmic control of the deposition process. On the contrary, changes in the exchange current density should not affect it. These results, being in agreement with common knowledge about the influence of different parameters on the current distribution in an electrochemical cell, demonstrate that a quick estimation of the current distribution can be performed by a simple comparison of the current density at the point of the cathode closest to anode with that at furthest point.

Experimental Investigation of the Propagation of Local Current Density Variations to Adjacent Cells in PEFC Stacks

2005 ◽  
Author(s):  
Marco Santis ◽  
Stefan A. Freunberger ◽  
Matthias Papra ◽  
Felix N. Bu¨chi
Keyword(s):  
Density Distribution ◽  
Working Conditions ◽  
Current Density ◽  
Cell Voltage ◽  
Current Density Distribution ◽  
Polymer Electrolyte Fuel Cell ◽  
Adjacent Cell ◽  
Fuel Cell Stack ◽  
Local Current Density ◽  
Local Current

The propagation of single cell performance losses to adjacent cells in a polymer electrolyte fuel cell stack is studied by means of local current density measurements in a two cell stack. In this stack, the working conditions of adjacent cells can be controlled independently in order to deliberately change the performance of one cell (inducing cell) and study the coupling effects to the adjacent cell (response cell), while keeping the working conditions of the later one unchanged. The experiments have shown that changes in the current density distribution caused by lowering of the air stoichiometry in the inducing cell cause changes in the current density distribution of the response cell in the order of 60% of the change of the inducing cell, even when the air stoichiometry of the response cell is kept constant. The losses in cell voltage of the inducing cell cause losses in cell voltage of the response cell in a magnitude between 30 and 50%.

scholarly journals The current distribution in an electrochemical cell. Part VI: The quantitative treatment for cells with three plane parallel electrode arrangements

2001 ◽  
Vol 66 (7) ◽  
pp. 491-498 ◽  
Author(s):  
K.I. Popov ◽  
S.M. Pesic ◽  
P.M. Zivkovic
Keyword(s):  
Quantitative Determination ◽  
Density Distribution ◽  
Current Distribution ◽  
Current Density ◽  
Electrochemical Cell ◽  
Current Density Distribution ◽  
Plane Parallel ◽  
Parallel Electrode ◽  
Quantitative Treatment

Amethod for the quantitative determination of the current density distribuion in cells with a three plane parallel electrode arrangement is proposed. It is shown that the current density distribution can be determined using the data obtained by simple polarization measurements. The relation to the Haring-Blum cell with P = 2 is discussed.

Energy Balance on Current Density Distribution of Cathode Spot in Vacuum Arc

2019 ◽  
Vol 139 (5) ◽  
pp. 302-308 ◽  
Author(s):  
Shinji Yamamoto ◽  
Soshi Iwata ◽  
Toru Iwao ◽  
Yoshiyasu Ehara
Keyword(s):  
Energy Balance ◽  
Density Distribution ◽  
Current Density ◽  
Cathode Spot ◽  
Current Density Distribution ◽  
Vacuum Arc

Automated Measurement of the Spatial Current Density Distribution of Process Electron Beams

Vestnik MEI ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 72-79
Author(s):  
Aleksey S. Kozhechenko ◽  
◽  
Aleksey V. Shcherbakov ◽  
Regina V. Rodyakina ◽  
Daria A. Gaponova ◽  
...  
Keyword(s):  
Density Distribution ◽  
Current Density ◽  
Electron Beams ◽  
Current Density Distribution ◽  
Automated Measurement ◽  
Spatial Current
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