✦ LIBER ✦

Electrochemical impedance spectroscopy of intercalated electrodes

✍ Scribed by A. Metrot; A. Harrach

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 463 KB
Volume: 38
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(93)80332-t

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✦ Synopsis

Ahatract-Electrochemical Impedance Spectra of graphite in contact with H,SO, at various steps of intercalation were analyzed by means of transmission line models. The thorough knowledge of both the crystallographic and geometric features of HOPG samples enables us to discuss quantitatively the nature of the low-frequency resistance and capacitance and of the diffusion factor 12/3RC, expressed as (pC)-', where 1 is sample width, R is resistance, C is capacitance and p is resistivity. It is shown that these electrodes can be considered either as porous blocking electrodes or as solid mixed conductors.

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