Hydrophilic Polyphenylene Sulfide/Cellulose/Polyphenylene Sulfide Composite Membrane with High Bubble Point Pressure and High Oxygen Purity for Alkaline Water Electrolysis

IF 4.7 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Polymer Materials Pub Date : 2025-03-30 DOI:10.1021/acsapm.4c04190

Jianhua Huang, Yulian Zheng, Hui Wu*, Hui Lin*, Yubin Hong, Lihui Chen and Liulian Huang*,

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Abstract

The advancement of ecofriendly and high-performance energy transformation systems has driven the development of advanced membrane materials for alkaline water electrolysis (AWE), which conduct hydroxide ions and block the interpenetration of hydrogen and oxygen. The wettability and inadequate gas blocking remain challenges for the AWE membrane. In this study, a hydrophilic polyphenylene sulfide/cellulose/polyphenylene sulfide (PPS/C/PPS) composite membrane with high bubble point pressure (BPP), outstanding oxygen purity, and low area resistance (AR) was fabricated. The porous PPS/C/PPS membrane exhibits a high BPP of 12.4 bar and low AR of 0.014 Ω·cm². Notably, gas purity tests reveal that the oxygen purity is about 99.974%, which is much higher than that of commercial hydrophilic polyphenylene sulfide (C-HPPS) (98.5%). The AWE cell with the PPS/C/PPS composite membrane shows a current density (CD) of 319.2 mA·cm^–2 in 30 wt % KOH solution at 80 °C at a voltage of 2 V, surpassing that of C-HPPS (208.0 mA·cm^–2). Additionally, the AWE cell exhibits high stability of more than 450 h at KOH solution (30 wt %) without attenuation, emphasizing the membrane’s competitive edge and its vast application potential.

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高泡点压力、高氧纯度碱性电解用亲水性聚苯硫醚/纤维素/聚苯硫醚复合膜

环保和高性能的能量转换系统的进步推动了用于碱性水电解（AWE）的先进膜材料的发展，这些膜材料可以导电氢氧离子并阻止氢和氧的相互渗透。AWE膜的润湿性和气阻不足仍然是挑战。本研究制备了一种具有高泡点压力（BPP）、高氧纯度和低面积阻力（AR）的亲水性聚苯硫醚/纤维素/聚苯硫醚（PPS/C/PPS）复合膜。多孔PPS/C/PPS膜具有12.4 bar的高BPP和0.014 Ω·cm2的低AR。值得注意的是，气体纯度测试表明，氧纯度约为99.974%，远高于商业亲水性聚苯硫醚（C-HPPS）的98.5%。采用PPS/C/PPS复合膜制备的AWE电池在30 wt % KOH溶液、80℃、2 V电压下的电流密度为319.2 mA·cm-2，超过了C- hpps的208.0 mA·cm-2。此外，AWE电池在KOH溶液（30% wt %）中表现出超过450小时的高稳定性，没有衰减，强调了该膜的竞争优势和巨大的应用潜力。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.