Call attention to using DRT and EIS to quantify the contributions of solid oxide cell components to the total impedance
Call attention to using DRT and EIS to quantify the contributions of solid oxide cell components to the total impedance
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DOI：
10.1016/j.ijhydene.2022.08.093
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发表时间：
2022-09
影响因子：
7.2
通讯作者：
Yudong Wang;Barbara Marchetti;Xiaoping Zhou
中科院分区：
文献类型：
--
作者：
Yudong Wang;Barbara Marchetti;Xiaoping Zhou
利用电化学阻抗谱（EIS）和弛豫时间分布（DRT）研究了阳极和阴极过程对固体氧化物燃料电池（SOFC）阻抗的贡献。具体而言，在阳极和阴极的气体组成的作用进行了探讨，旨在去卷积，识别和量化不同的阳极和阴极过程的贡献的系统研究。在DRT谱中观察到五个不同的弛豫时间分布;虽然峰归因于电极处的扩散和电荷转移过程，但发现两个电极同时对各种峰作出贡献。此外，发现两种不同的操作条件可以返回等效的DRT谱。虽然DRT分析可以获得有关电池性能的有用信息，但在评估和量化SOFC内的阳极和阴极电阻时需要额外考虑。
The contributions of anode and cathode processes to solid oxide fuel cell (SOFC) impedance were studied using electrochemical impedance spectroscopy (EIS) and distribution of relaxation time (DRT). Specifically, the role of gas composition at both anode and cathode was explored in a systematic study aimed at deconvoluting, identifying and quantifying the contributions of different anode and cathode processes. Five distinct relaxation time distributions were observed in the DRT spectra; although the peaks were ascribed to diffusion and charge transfer processes at the electrodes, it was found that both electrodes contributed to various peaks at the same time. Moreover, it was found that two distinctive operating conditions could return equivalent DRT spectra. While DRT analysis allows to obtain useful information regarding cell performance, extra consideration is needed when assessing and quantifying anodic and cathodic resistances within the SOFC.