Elucidating Reaction Resistances in Electrode-Supported Solid Oxide Cells Using a Nonlinear Least-Square Model

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-04-23 DOI:10.1016/j.electacta.2025.146289

Rikuto Konishi, Riyan Achmad Budiman, Marika Sakai, Mina Yamaguchi, Tatsuya Kawada, Keiji Yashiro

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Abstract

To understand the physical meaning of each resistance in an electrode-supported solid oxide cell (ECS), a complex nonlinear least-square (CNLS) equivalent circuit was developed. The commercial type of ECS measured their electrochemical properties in various gas compositions (oxygen, hydrogen, and water vapor) and temperature. The obtained impedance spectra were analyzed using the distribution of relaxation times (DRT) method to deconvolute the resistance of the cell. Subsequently, the developed CNLS equivalent circuit was used to provide the physical meaning of each resistance. R-CPE was used to analyze gas conversion resistance, Warburg impedance was used to analyze gas diffusion at a very-low-frequency region, and Gerischer impedance was used to analyze electrode resistance. Finally, the model was validated by comparing the transport properties of the electrode obtained from the model with the reported data. Therefore, the developed model could aid in understanding the physical meaning of each resistance of the cell.

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用非线性最小二乘模型阐明电极支撑固体氧化物电池的反应电阻

为了理解电极支撑固体氧化物电池（ECS）中每个电阻的物理意义，开发了一个复杂的非线性最小二乘等效电路（CNLS）。商用ECS在不同的气体成分（氧气、氢气和水蒸气）和温度下测量了它们的电化学性能。利用松弛时间分布法（DRT）对得到的阻抗谱进行分析，对电池的电阻进行反卷积。随后，开发的CNLS等效电路用于提供每个电阻的物理含义。采用R-CPE分析气体转换电阻，采用Warburg阻抗分析气体在极低频区域的扩散，采用Gerischer阻抗分析电极电阻。最后，通过将模型得到的电极输运特性与文献数据进行比较，验证了模型的正确性。因此，开发的模型可以帮助理解细胞的每个电阻的物理意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.