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duan0718: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2014-10-16 18:57:57
In the region of the limiting current, when the electrode process is mass-transfer controlled, the value of the current density is:

i_{limiting} = \frac {nFD} {\delta} C^*
where:

D is the diffusion coefficient;
¦Ä is the diffusion layer thickness;
C* is the concentration of the electroactive (limiting) species in the bulk of the electrolyte.
C(0,t) is the time-dependent concentration at the distance zero from the surface.
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