期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 149, 期 5, 页码 E166-E172出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1467368
关键词
-
To separate anode and cathode contributions to the impedance of a thin solid electrolyte cell, many workers place a reference electrode on the surface of the inactive electrolyte, coplanar with the working electrode. This practice is evaluated theoretically using finite-element calculations of the real and imaginary potential distributions in the electrolyte under the conditions of ac impedance. The results of this analysis show that minor errors in the alignment of the anode and cathode can create significant errors in the measured half-cell overpotential. These errors involve not only quantitative scaling factors, but also cross-contamination of anode and cathode frequency response in the measured half-cell impedances. Even if electrodes are perfectly aligned, differences between the anode and cathode kinetics and/or frequency response may cause inherent distortion of the impedance, including frequency dispersion and inductive artifacts. We evaluate two approaches (pellets and microelectrode arrays) that can be used to avoid ambiguities. (C) 2002 The Electrochemical Society.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据