Determination of the diffusion coefficient of hydrogen in metals from the rate of change in the electrical resistance in desorption

1985 ◽  
Vol 21 (1) ◽  
pp. 22-25
Author(s):  
S. I. Mikitishin ◽  
V. V. Fedorov ◽  
O. M. Sergienko ◽  
O. R. Sokolovskii ◽  
Ya. M. Spas
Keyword(s):  
Diffusion Coefficient ◽  
Electrical Resistance ◽  
Rate Of Change ◽  
Hydrogen In Metals

DETERMINATION OF DIFFUSION COEFFICIENT OF THE TURKISH TRONA IN WATER

1996 ◽  
Vol 05 (01) ◽  
pp. 3-11 ◽  
Author(s):  
GÜLHAYAT NASÜN-SAYGILI ◽  
HASANCAN OKUTAN
Keyword(s):  
Diffusion Coefficient

Lithium Ion Diffusion Through Glassy Carbon Plate

1997 ◽  
Vol 496 ◽  
Author(s):  
M. Inaba ◽  
S. Nohmi ◽  
A. Funabiki ◽  
T. Abe ◽  
Z. Ogumi
Keyword(s):  
Diffusion Coefficient ◽  
Glassy Carbon ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Irreversible Capacity ◽  
Oxidation Current ◽  
Current Curve ◽  
Carbon Plate ◽  
Lithium Ion Diffusion

ABSTRACTThe electrochemical permeation method was applied to the determination of the diffusion coefficient of Li+ion (DLi+) in a glassy carbon (GC) plate. The cell was composed of two compartments, which were separated by the GC plate. Li+ions were inserted electrochemically from one face, and extracted from the other. The flux of the permeated Li+ions was monitored as an oxidation current at the latter face. The diffusion coefficient was determined by fitting the transient current curve with a theoretical one derived from Fick's law. When the potential was stepped between two potentials in the range of 0 to 0.5 V, transient curves were well fitted with the theoretical one, which gaveDLi+ values on the order of 10−8cm2s−1. In contrast, when the potential was stepped between two potentials across 0.5 V, significant deviation was observed. The deviation indicated the presence of trap sites as well as diffusion sites for Li+ions, the former of which is the origin of the irreversible capacity of GC.

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