JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Yiwen Liao,Guoxiong Deng,Li Ding,Haihui Wang
Green hydrogen plays a pivotal role in the decarbonizing process. Hydrogen production by alkaline water electrolysis (AWE) is the most promising way for large-scale hydrogen production because of the merits of high-efficient and cost-effective. In the AWE system, the membrane is used to conduct hydroxide ions and block the interpenetration of hydrogen and oxygen, which is a crucial component. However, the current membranes are limited by either the high area resistance or inadequate gas-blocking ability. Herein, we proposed a thin (∼268 μm) and flexible composite membrane featuring both low area resistance (∼0.14 Ω cm 2 in 30 wt% KOH solution) and high bubble point pressure (BPP, ∼24 bar). When applied in alkaline water electrolysis, the composite membrane with the commercial NiMo and NiFe catalysts shows a current density of 2.3 A cm -2 at the voltage of 2 V in 30 wt% KOH solution at 80 °C, surpassing the capabilities of the ZIRFON UTP 500 membrane. Notably, the in-situ gas purity tests reveal an impressive hydrogen purity of ∼99.997%, much higher than that of the state-of-the-art membranes. Additionally, the stability tests conducted more that 600 h at 80 °C without performance attenuation highlight the membrane's competitiveness and promising commercial prospects.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2025
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IF 4.7
Jianhua Huang,Yulian Zheng,Hui Wu,Hui Lin,Yubin Hong,Lihui Chen,Liulian Huang
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.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
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2025
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IF 4.3
Liping Liu,Ju Wang,Guanjun Yang,Shuyuan Wang,Jinyi Wang,Zhibo Ren,Weiqi Guo,Peng Liu
Alkaline water electrolysis is considered an optimal technology for large-scale production of green hydrogen because of its economic and mature characteristics. The separator plays a crucial role in the alkaline water electrolysis process, as it fulfills the functions of gas separation and electrolyte transport. Nevertheless, the development of advanced separators with low ohmic resistance, high gas barrier ability, and good durability simultaneously remains a major challenge. Here, we first fabricated a series of high-performance composite separators with a porous bicontinuous structure by employing a nonsolvent-induced phase separation technique using a “weak solvent” (a solvent with a low affinity toward the membrane-forming polymer). The unique porous bicontinuous structure endows the membranes with high porosity, narrow pore size distribution with nanopores, and good hydrophilicity. As a result, the composite separator exhibits not only a low area resistance (0.13 Ω·cm2) but also a high bubble point pressure (5.1 bar). The composite separator also displays excellent durability in both long-term electrolysis and alkaline-aging tests.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2020
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IF 2.888
Yahui Gao,Chuanyan Li,Shuqian Xia,Peisheng Ma
In this work, the solubility of CO 2 in three binary hydrocarbon mixtures of different molecular structures, hexane + cyclohexane, cyclopentane + ethylbenzene and toluene + undecane at 313.15 K, 343.15 K, 373.15 K and pressures up to 13.83 MPa were measured. The solubility measurements were undertaken in the designed apparatus. The experimental results show that the solubilities of CO 2 in the binary hydrocarbon mixtures are mainly affected by the molecular structure and carbon numbers of hydrocarbon. The more ratios of high-carbon hydrocarbon in the mixtures, the lower solubility of CO 2 is. The experimental data were compared with the calculated results of PR and PSRK models. The average absolute relative deviations of bubble pressure were 2.54%–5.66% and 1.45%–7.66%, respectively. Both models gave satisfied results, while the PR was superior to PSRK when the interaction parameters of the relevant systems were provided. PRSK model can calculate the solubility data better near the critical region.
研究领域:
化学工程
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热力学
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石油工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Weixin Li,Zhaoce Sun,Xianmin Ye,Youme He
The polyphenylene sulfide (PPS) mesh-based polysulfone (PSF)-zirconia (ZrO 2 ) composite diaphragm represents a new type of high-performance diaphragm for alkaline water electrolysis hydrogen production, offering low area resistance and high chemical stability. In this study, composite diaphragms with excellent performance are prepared using preheated compression molding, phase inversion precipitation, and vacuum stirring degassing techniques. The comprehensive performance of the prepared diaphragm is compared to that of the commercial Zirfon® diaphragm. The results indicate that the prepared composite diaphragm, with a thickness of 140 μm, exhibits excellent performance. Compared to the Zirfon® UTP 220 diaphragm, the ultra-thin composite diaphragm demonstrates a reduction in area resistance from 0.19 Ω cm 2 to 0.1 Ω cm 2 , an increase in bubble point pressure from 2.31 bar to 2.46 bar, and a voltage of 1.84 V at 1000 mA cm −2 . The incorporation of the PPS mesh resulted in a substantial improvement in tensile strength. The application of an ultra-thin composite diaphragm based on PPS mesh can significantly enhance the efficiency of hydrogen production via alkaline water electrolysis.
研究领域:
材料科学
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电化学
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可再生能源
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Zengguang Yao,Haocheng Sun,Ziwen Liu,Zhong Gao,Shiyi Zhu,Yan Wang,Minghao Zhou,Hong Wu,Zhongyi Jiang
Alkaline water electrolysis (AWE) is one of the most effective methods for green hydrogen production, requiring membranes with high ion conductivity and bubble point pressure to conduct hydroxide ions and prevent gas mixing. Herein, we design a zwitterion-functionalized composite membrane (SB-ZrO2/PSf) by grafting sulfonate betaine (SB) groups onto zirconia particles and blending them with polysulfone (PSf). SB groups create a dense hydration layer via electrostatic interactions, improving wettability and suppressing gas crossover. The composite membrane exhibits excellent hydrophilicity with a water contact angle of 61.1°, 30% lower than commercial Zirfon PERL UTP 500, a low area resistance of 0.11 Ω cm2, 57% lower, and a high bubble point pressure of 4.0 bar versus the Zirfon membrane (1.95 bar). The SB-ZrO2/PSf membrane achieves 960 mA cm–2 at 2.0 V and stable operation over 230 h at 500 mA cm–2 in 30 wt % KOH at 80 °C, demonstrating enhanced electrolysis performance and stability.
研究领域:
能源材料
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电化学
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膜科学
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纳米复合材料
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制氢
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）