Correction of Experimental Data for the Ohmic Potential Drop Corresponding to a Secondary Current Distribution on a Disk Electrode

2009 ◽  
pp. 127-127-15 ◽  
Author(s):  
JM Esteban ◽  
M Lowry ◽  
ME Orazem
Keyword(s):  
Experimental Data ◽  
Current Distribution ◽  
Potential Drop ◽  
Disk Electrode ◽  
Secondary Current ◽  
Ohmic Potential Drop

THE THEORY OF CURRENT DISTRIBUTION AND POTENTIAL PROFILE AT AN ELECTRODE OF SIGNIFICANT OHMIC RESISTANCE

1963 ◽  
Vol 41 (10) ◽  
pp. 2447-2454 ◽  
Author(s):  
B. E. Conway ◽  
E. Gileadi ◽  
H. G. Oswin
Keyword(s):  
Current Distribution ◽  
Potential Drop ◽  
Practical Significance ◽  
High Current ◽  
Fuel Cell Electrodes ◽  
Metal Solution ◽  
Ohmic Resistance ◽  
Order Of Magnitude ◽  
Ohmic Potential Drop ◽  
Linear Geometry

The problem of current distribution at an electrode of linear geometry having a significant ohmic resistance is examined for conditions where the ohmic potential drop along the electrode material is of the same order of magnitude as the metal–solution potential difference. This problem is of practical significance in primary and secondary cells at high current drains and in certain types of fuel cell electrodes. The current distribution and metal–solution potential profiles are calculated as limiting cases of a general theory. The true and apparent current–potential relations are compared theoretically.

Corrosion of Electronic and Magnetic Devices and Materials

1996 ◽  
Vol 451 ◽  
Author(s):  
Gerald S. Frankel
Keyword(s):  
Thin Film ◽  
Failure Modes ◽  
Galvanic Corrosion ◽  
Potential Drop ◽  
Magnetic Devices ◽  
Disk Structure ◽  
Magnetic Layers ◽  
Ohmic Potential Drop ◽  
Corrosion Problem ◽  
Corrosion Susceptibility

ABSTRACTCorrosion of thin film structures commonly used in electronic and magnetic devices is discussed. Typical failure modes are presented, and galvanic corrosion is discussed in some detail since it is one common problem with such devices. A graphical explanation for the determination of the ohmic potential drop during galvanic corrosion is presented. The corrosion problem of thin film disks is shown to have changed during the past ten years owing to changes in disk structure. The corrosion susceptibility of two antiferromagnetic alloys used for exchange coupling to soft magnetic layers is discussed.

Secondary Current Distribution in a Curvilinear Hull Cell

1998 ◽  
Vol 145 (9) ◽  
pp. 3042-3046 ◽  
Author(s):  
Jongwook Lee ◽  
Thomas W. Chapman
Keyword(s):  
Current Distribution ◽  
Secondary Current ◽  
Hull Cell

scholarly journals Kinetics of electrochemical intercalation of lithium ion into Li[Li0.2Co0.3Mn0.5]O2 electrode from Li2SO4 solution

2021 ◽  
Vol 23 (09) ◽  
pp. 656-687
Author(s):  
K.C. Mahesh ◽  
◽  
G.S. Suresh ◽  
Keyword(s):  
Aqueous Electrolyte ◽  
Lithium Ion ◽  
Potential Drop ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Ohmic Potential Drop ◽  
Ion Intercalation ◽  
Time Invariant ◽  
Kinetics Of ◽  
Titration Technique

The kinetics of electrochemical lithium ion intercalation into Li[Li0.2Co0.3Mn0.5]O2 electrode in 2 M Li2SO4 aqueous electrolyte has been studied using two electroanalytical methods, namely, potentiostatic intermittent titration technique (PITT) and galvanostatic intermittent titration technique (GITT). The results are compared with those from nonaqueous electrolytes. Layered, lithium-rich Li[Li0.2Co0.3Mn0.5]O2 cathode material was synthesized by reactions under autogenic pressure at elevated temperature (RAPET) method. The effects of ohmic potential drop and charge-transfer resistance have been considered while predicting the current transients obtained with aqueous electrolyte. For PITT and GITT, we have defined their characteristic time-invariant functions, It1/2 and dE/dt1/2, respectively to present the diffusion time constant τ. Application of different theoretical diffusion models for treating the results obtained by the above-mentioned techniques allowed us to calculate the diffusion coefficient of lithium ions (D) at different potentials (E). The intercalation process is explained by considering the possible attractive interactions of the intercalated species in terms of Frumkin intercalation isotherm. We have observed a strictcorrespondence between the peaks of the intercalation capacitance and the minima in the corresponding log D vs. E curve.

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