Electrochemical Impedance Analysis of Hydrogen Storage Alloy Negative Electrodes Based on the Porous Electrode Model

Electrochemical impedance method was applied to pasted-type negative electrodes (current collector: metal core sheet) of Ni-MH batteries. The following information was obtained during a charge-discharge cycle test without disassembling the batteries; 1) solution resistance, 2) contact resistance bet...

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Published inNippon Kagakukai shi (1972) Vol. 12; no. 12; pp. 791 - 795
Main Authors MORISHITA, Shinya, ISOGAI, Yoshihiro, OHYA, Yutaka, TOWATA, Shin-ichi, ABE, Katsushi
Format Journal Article
LanguageEnglish
Japanese
Published 01.12.1999
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Summary:Electrochemical impedance method was applied to pasted-type negative electrodes (current collector: metal core sheet) of Ni-MH batteries. The following information was obtained during a charge-discharge cycle test without disassembling the batteries; 1) solution resistance, 2) contact resistance between particles of the active material, 3) impedance of the corrosion product, 4) charge transfer resistance and capacitance of the electric double layer at the interface between the electrolyte and the active material, 5) Warburg impedance caused by hydrogen diffusion in the active material. It was also clarified that the porosity of the electrode was very important to analyze impedance spectra measured by the pasted-type electrodes.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0369-4577
2185-0925
DOI:10.1246/nikkashi.1999.791