On the ideal polarisability of electrodes displaying cpe-type capacitance dispersion
On the ideal polarisability of electrodes displaying cpe-type capacitance dispersion
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DOI：
10.1016/s0022-0728(99)00480-5
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发表时间：
2000-02-07
影响因子：
4.5
通讯作者：
Sadkowski, A
中科院分区：
文献类型：
--
作者：
Sadkowski, A
理想极化率的概念与显示恒定相位角行为的固体电极（恒定相位元件（cpe））的相关性在该期刊中的最近争论的背景下被重新考虑[Zoltowski，443（1998）149; Lang和Heusler，457（1998）257]。结果表明，作为电化学界面的模型的cpe是“非物理的”，首先是由于电位或电流扰动后的稳态的不可达性。它也可以得出结论，热力学方程的平衡，一个理想的极化电极不能适用于电极建模的CPE，因为电荷和双电层电容（C-D）的概念是无关紧要的框架中的CPE模型。因此，从cpe模拟的阻抗数据计算C-d的程序是不合理的。(C)2000 Elsevier Science S.A. All rights reserved.
The relevance of the concept of ideal polarisability to solid electrodes displaying constant phase angle behaviour (constant phase element (cpe)) is reconsidered in the context of the recent dispute in this Journal [Zoltowski, 443 (1998) 149; Lang and Heusler, 457 (1998) 257]. It is shown that the cpe as a model of the electrochemical interface is 'unphysical' due, first of all to unattainability of the steady state after potential or current perturbation. It is also concluded that the thermodynamic equations governing the equilibria of an ideally polarisable electrode cannot be applied to an electrode modelled by cpe because the notions of the charge and double layer capacitance (C-d) are irrelevant in the framework of the cpe model. As a consequence, procedures of calculation of C-d from impedance data modelled by cpe are unjustified. (C) 2000 Elsevier Science S.A. All rights reserved.