Spatial Structure Regulation: A Rod‐Shaped Viologen Enables Long Lifetime in Aqueous Redox Flow Batteries
| العنوان: | Spatial Structure Regulation: A Rod‐Shaped Viologen Enables Long Lifetime in Aqueous Redox Flow Batteries |
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| المؤلفون: | Gang Chang, Linlin Hu, Hao Fan, Bo Hu, Jiangxuan Song, Hongbin Li |
| المصدر: | Angewandte Chemie. 133:27177-27183 |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Aqueous solution, Membrane permeability, Chemistry, Viologen, General Chemistry, General Medicine, Ring (chemistry), Photochemistry, Redox, Catalysis, Ion, Bipyridine, chemistry.chemical_compound, medicine, Alkyl, medicine.drug |
| الوصف: | A stable rod-like sulfonated viologen (R-Vi) derivative is developed through a spatial-structure-adjustment strategy for neutral aqueous organic redox flow batteries (AORFBs). The obtained R-Vi features four individual methyl groups on the 2,2',6,6'-positions of the 4,4'-bipyridine core ring. The tethered methyls confine the movement of the alkyl chain as well as the sulfonic anion, thus driving the spatial structure from sigmoid to rod shape. The R-Vi with weak charge attraction and large molecular dimension displays an ultralow membrane permeability that is only 14.7 % of that of typical sigmoid viologen. Moreover, the electron-donating effect of methyls endows R-Vi with the lowest redox potential of -0.55 V vs. SHE among one-electron-storage viologen-based AORFBs. The AORFB with the R-Vi anolyte and a K4 Fe(CN)6 catholyte exhibits an energy efficiency up to 87 % and extremely low capacity-fade rate of 0.007 % per cycle in 3200 continuous cycles. |
| تدمد: | 1521-3757 0044-8249 |
| DOI: | 10.1002/ange.202110010 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::401bd7fe904a34d92173b743020a5eab https://doi.org/10.1002/ange.202110010 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....401bd7fe904a34d92173b743020a5eab |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213757 00448249 |
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| DOI: | 10.1002/ange.202110010 |