Reinforced short-side-chain Aquivion® membrane for proton exchange membrane water electrolysis

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL International Journal of Hydrogen Energy Pub Date : 2022-04-26 DOI:10.1016/j.ijhydene.2022.03.061

Stefania Siracusano , Fabiola Pantò , Stefano Tonella , Claudio Oldani , Antonino S. Aricò

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引用次数: 5

Abstract

A reinforced short-side-chain perﬂuorosulfonic acid (PFSA) Aquivion® membrane with equivalent weight (EW) of 980 g/eq and 50 μm thickness produced by Solvay Specialty Polymers was investigated for operation in polymer electrolyte membrane (PEM) water electrolysis. The membrane produced by a dispersion casting process was reinforced by introducing polytetrafluoroethylene (PTFE) fibres in order to enhance mechanical and dimensional stability properties while keeping high conductivity and decreased ohmic drop for operation at high current density. A conventional extruded PFSA Aquivion® membrane with similar EW and thickness was investigated for comparison under similar operating conditions. Membrane-electrode assemblies (MEAs) made of reinforced membranes were tested in a single cell and compared to extruded membranes bared MEAs. All MEAs consisted of home-made unsupported IrRuOx anode and carbon-supported Pt (40%) cathode electrocatalysts. Electrochemical tests showed better water splitting performance for the reinforced Aquivion® based membrane-electrode assembly as compared to the benchmark based MEA. At 90 °C, a current density of 5 Acm⁻² was recorded at 1.8 V (∼80% voltage efficiency vs. Higher Heating Value (HHV) with the reinforced Aquivion® membrane. The cell voltage for the reinforced membrane-based cell was about 50 mV lower than the extruded one during a 3500 h durability test. Moreover, lower recoverable losses were observed for the reinforced membrane based MEA during steady-state durability tests and no membrane thinning appeared after prolonged operation.

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用于质子交换膜水电解的增强短侧链Aquivion®膜

研究了Solvay Specialty Polymers生产的等效重量(EW)为980 g/eq、厚度为50 μm的全氟磺酸(PFSA) aququivion®短侧链增强膜在聚合物电解质膜(PEM)电解中的运行情况。通过引入聚四氟乙烯(PTFE)纤维来增强由分散铸造工艺生产的膜，以提高机械和尺寸稳定性，同时保持高导电性和降低在高电流密度下运行的欧姆降。在相似的操作条件下，研究了具有相似EW和厚度的传统挤压PFSA aquvion®膜的比较。在单个细胞中测试了由增强膜制成的膜电极组件(MEAs)，并与挤压膜裸露的MEAs进行了比较。所有mea均由自制的无负载IrRuOx阳极和碳负载Pt(40%)阴极电催化剂组成。电化学测试表明，与基于MEA的基准相比，增强aquvion®膜电极组件具有更好的水分解性能。在90°C时，在1.8 V下记录了5 Acm−2的电流密度(与更高热值(HHV)相比，电压效率约为80%)。在3500 h的耐久性试验中，增强膜基电池的电池电压比挤压膜基电池低约50 mV。此外，在稳态耐久性试验中，基于增强膜的MEA的可恢复损失更低，并且在长时间运行后没有出现膜变薄的现象。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.