Modeling the electrochemical behavior and interfacial junction profiles of bipolar membranes at solar flux relevant operating current densities
العنوان: | Modeling the electrochemical behavior and interfacial junction profiles of bipolar membranes at solar flux relevant operating current densities |
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المؤلفون: | Ibadillah A. Digdaya, Meng Lin, Chengxiang Xiang |
بيانات النشر: | Royal Society of Chemistry, 2021. |
سنة النشر: | 2021 |
مصطلحات موضوعية: | Materials science, Renewable Energy, Sustainability and the Environment, Diffusion, Energy Engineering and Power Technology, 02 engineering and technology, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrostatics, 01 natural sciences, Dissociation (chemistry), 0104 chemical sciences, Fuel Technology, Chemical physics, Electric field, 0210 nano-technology, Partial current, Leakage (electronics), Voltage |
الوصف: | A 1-dimensional, multi-physics model that accounts for the migration and diffusion of solution species, electrostatics, and chemical reactions, in particular water dissociation (WD), at bipolar membrane (BPM) interfaces was developed to study the electrochemical behavior of bipolar membranes (BPMs) at solar flux relevant operating current densities (tens of mA cm⁻²). Significant partial current densities for WD were observed at BPM voltages much less than the equilibrium voltage, e.g., 59 mV × ΔpH from both experiments and modeling. The co-ion leakage across the BPM at pH differentials accounted for the early presence of the partial current density for WD. Two distinctive electric field dependent WD pathways, the un-catalyzed pathway and the catalyzed pathway, were quantitatively and parametrically studied to improve the turn-on potential of the BPM. The catalyzed pathway accounted for the majority of the partial current density for WD at low voltages, while the un-catalyzed pathway dominated the WD at relatively high voltages. Significant WD was observed only within the interfacial CL ( |
وصف الملف: | application/pdf |
اللغة: | English |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bd328403b1fa9396a1fa4968fc7e0fb https://resolver.caltech.edu/CaltechAUTHORS:20210401-090557418 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....5bd328403b1fa9396a1fa4968fc7e0fb |
قاعدة البيانات: | OpenAIRE |
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