Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (09): 804-810.doi: 10.3866/PKU.WHXB19980908

• ARTICLE • Previous Articles     Next Articles

Electrochemical lmpedance Spectroscopy of Porous Nickel Electrode and its Mathematical Model

Yuan An-Bao, Cheng Shao-An, Zhang Jian-Qing, Cao Chu-Nan   

  1. Department of Chemistry,Zhejiang University,Hangzhou 310027
  • Received:1997-12-15 Revised:1998-03-16 Published:1998-09-15
  • Contact: Yuan An-Bao

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Abstract:

A mathematical model for electrochemical impedance spectroscopy(EIS) of porous nickel electrode has been proposed based on the fact that the kinetics of nickel electrode reaction is mainly controled by the proton diffusion in solid state. Effects of some parameters such as double layer capacitance Cd1, diffusion coeffecient of proton D and powder size of active material To on the EIS of nickel electrode have been predicted according to this model. The effects of state of chargc(SOC) and mass transport in liquid phase on the EIS of porous nickel electrode hare also been discussed.

Key words: Porous nickel electrode, Electrochemical impedance spectroscopy(EIS), Mthematical model