High-Temperature Water Electrolysis Properties of Membrane Electrode Assemblies with Nafion and Crosslinked Sulfonated Polyphenylsulfone Membranes by Using a Decal Method

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-08-08 DOI:10.3390/membranes14080173

Je-Deok Kim

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Abstract

To improve the stability of high-temperature water electrolysis, I prepared membrane electrode assemblies (MEAs) using a decal method and investigated their water electrolysis properties. Nafion 115 and crosslinked sulfonated polyphenylsulfone (CSPPSU) membranes were used. IrO2 was used as the oxygen evolution reaction (OER) catalyst, and Pt/C was used as the hydrogen evolution reaction (HER) catalyst. The conductivity of the CSPPSU membrane at 80 °C and 90% RH (relative humidity) is about four times lower than that of the Nafion 115 membrane. Single-cell water electrolysis was performed while measuring the current density and performing electrochemical impedance spectroscopy (EIS) at cell temperatures from 80 to 150 °C and the stability of the current density over time at 120 °C and 1.7 V. The current density of water electrolysis using Nafion 115 and CSPPSU membranes at 150 °C and 2 V was 1.2 A/cm2 for both. The current density of the water electrolysis using the CSPPSU membrane at 120 °C and 1.7 V was stable for 40 h. The decal method improved the contact between the CSPPSU membrane and the catalyst electrode, and a stable current density was obtained.

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采用贴花法研究含 Nafion 膜和交联磺化聚苯砜膜的膜电极组件的高温水电解特性

为了提高高温水电解的稳定性，我采用贴花法制备了膜电极组件（MEA），并研究了它们的水电解性能。使用了 Nafion 115 和交联磺化聚苯砜 (CSPPSU) 膜。以 IrO2 作为氧进化反应（OER）催化剂，以 Pt/C 作为氢进化反应（HER）催化剂。在 80 °C 和 90% RH（相对湿度）条件下，CSPPSU 膜的电导率比 Nafion 115 膜低约四倍。在 80 至 150 °C 的电池温度下进行了单电池水电解，同时测量了电流密度并进行了电化学阻抗谱分析（EIS），并在 120 °C 和 1.7 V 电压下测量了电流密度随时间变化的稳定性。在 150 °C 和 2 V 条件下，使用 Nafion 115 和 CSPPSU 膜电解水的电流密度均为 1.2 A/cm2 。贴花法改善了 CSPPSU 膜与催化剂电极之间的接触，获得了稳定的电流密度。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico