Academic Journal
Porous PVA skin-covered thin Zirfon-type separator as a new approach boosting high-rate alkaline water electrolysis beyond 1000 hours’ lifespan
| العنوان: | Porous PVA skin-covered thin Zirfon-type separator as a new approach boosting high-rate alkaline water electrolysis beyond 1000 hours’ lifespan |
|---|---|
| المؤلفون: | Xi Luo, Nengneng Xu, Yongnan Zhou, Xiaohui Yang, Woochul Yang, Guicheng Liu, Joong Kee Lee, Jinli Qiao |
| المصدر: | eScience, Vol 4, Iss 6, Pp 100290- (2024) |
| بيانات النشر: | KeAi Communications Co. Ltd., 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Mechanical engineering and machinery LCC:Electronics |
| مصطلحات موضوعية: | Alkaline water electrolysis, Porous separator, Zirfon type, Polyvinyl alcohol, Skin layer, Mechanical engineering and machinery, TJ1-1570, Electronics, TK7800-8360 |
| الوصف: | Regulating the pore structure of a zirfon-based diaphragm is critical to promoting a high-rate alkaline electrolyzer, but it is still a big challenge to respond “trade-off” between the thickness of the diaphragm and the current density/gas barrier behavior. In this work, a porous hydrophilic skin layer with ∼μm thick of polyvinyl alcohol (PVA) has been successfully constructed and casted onto the thin zirfon-type separator composite (V-Zirfon-350 μm). The V-Zirfon-350 μm separator generates a high KOH uptake (> 90%), low area resistance (0.2026 Ω cm2) but a low electrolyte permeation flux density (5.2 × 10−4 mL cm−2 s−1 at 0.5 bar), which largely surpasses the state-of-the-art commercial Zirfon UTP-500 μm diaphragm. When coupled with Raney Ni cathode and NiCoMo-LDH anode catalysts, the V-Zirfon-350 μm separator offers a high current density over 1300 mA cm−2 @2.0 V (80 °C in 30% KOH) and a superior stability of 300 h under 800 mA cm−2 for alkaline water electrolysis (AWE). Specifically, the voltage is merely ∼3.5 V for two electrolytic cells connected in series, which can be even conducted for more than 1300 h at different operational conditions. This work provides a novel methodology for the practical application of a thin Zirfon-based diaphragm. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2667-1417 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2667141724000788; https://doaj.org/toc/2667-1417 |
| DOI: | 10.1016/j.esci.2024.100290 |
| URL الوصول: | https://doaj.org/article/0d5b1bd75548404c9fc287d70f4663af |
| رقم الانضمام: | edsdoj.0d5b1bd75548404c9fc287d70f4663af |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26671417 |
|---|---|
| DOI: | 10.1016/j.esci.2024.100290 |