Degradation of iron‐nickel alloy interconnects in contact with lanthanum nickelates based double‐layer electrodes during long‐term tests

IF 1.8 4区工程技术 Q3 Chemical Engineering

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-05-18 DOI:10.1002/apj.3091

Vadim A. Eremin, Maxim V. Ananyev, Anton A. Solodyankin, Alexander A. Markin

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Abstract

This paper focuses on long‐term tests held during 1,000 h on different Membrane‐Electrode‐Interconnect Assemblies (MEIAs), consisting of an Fe‐Ni alloy interconnect and an electrochemical cell based on a Ce0.8Sm0.2O2–δ electrolyte, the double‐layer working electrode with a La2NiO4 + δ – Ce0.8Sm0.2O2–δ composite functional layer, and a LaNi0.6Fe0.4O3–δ current collector layer, and a platinum reference electrode (O2, LaNi0.6Fe0.4O3–δ|La2NiO4 + δ – Ce0.8Sm0.2O2–δ|Ce0.8Sm0.2O2–δ|Pt, O2). These tests were carried out on MEIAs with the Cr‐free 47ND alloy of the Fe–Ni system with and without surface modification at 850°C in air. The electrochemical performance of MEIAs was studied without polarization as well as under cathodic and anodic polarization with current density 0.5 A cm−2 by means of electrochemical impedance spectroscopy (EIS). The mechanism of the MEIA evolution during long‐term test is discussed.

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与基于镍酸镧的双层电极接触的铁镍合金互连器件在长期测试中的降解情况

本文主要对不同的膜-电极-互连组件（MEIAs）进行了 1000 小时的长期测试，这些组件包括一个铁-镍合金互连器件和一个基于 Ce0.8Sm0.2O2-δ 电解质的电化学电池，以及一个带有 La2NiO4 + δ - Ce0.8Sm0.2O2-δ 复合功能层的双层工作电极。2O2-δ 电解质的电化学电池、带有 La2NiO4 + δ - Ce0.8Sm0.2O2-δ 复合功能层的双层工作电极以及 LaNi0.6Fe0.4O3-δ 集流层，以及一个铂参比电极（O2，LaNi0.6Fe0.4O3-δ|La2NiO4 + δ - Ce0.8Sm0.2O2-δ|Ce0.8Sm0.2O2-δ|Pt，O2）。这些测试是在 850°C 的空气中，对含有和未进行表面改性的铁-镍系无铬 47ND 合金的 MEIA 进行的。通过电化学阻抗谱（EIS）研究了 MEIA 在无极化以及电流密度为 0.5 A cm-2 的阴极和阳极极化条件下的电化学性能。讨论了 MEIA 在长期测试过程中的演变机制。

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来源期刊

Asia-Pacific Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

3.50

自引率

11.10%

发文量

111

审稿时长

2.8 months

期刊介绍： Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).