دورية أكاديمية
Unlocking Four-electron Conversion in Tellurium Cathodes for Advanced Magnesium-based Dual-ion Batteries
| العنوان: | Unlocking Four-electron Conversion in Tellurium Cathodes for Advanced Magnesium-based Dual-ion Batteries |
|---|---|
| المؤلفون: | Morag, A., Chu, X., Marczewski, M., Kunigkeit, J., Neumann, C., Sabaghi, D., Zukowska, G., Du, J., Li, X., Turchanin, A., Brunner, E., Feng, X., Yu, M. |
| المصدر: | Angewandte Chemie International Edition |
| سنة النشر: | 2024 |
| المجموعة: | Max Planck Society: MPG.PuRe |
| الوصف: | Magnesium (Mg) batteries hold promise as a large-scale energy storage solution, but their progress has been hindered by the lack of high-performance cathodes. Here, we address this challenge by unlocking the reversible four-electron Te 0 /Te 4+ conversion in elemental Te, enabling the demonstration of superior Mg//Te dual-ion batteries. Specifically, the classic magnesium aluminum chloride complex (MACC) electrolyte is tailored by introducing Mg bis(trifluoromethanesulfonyl)imide (Mg(TFSI) 2 ), which initiates the Te 0 /Te 4+ conversion with two distinct charge-storage steps. Te cathode undergoes Te/TeCl 4 conversion involving Cl − as charge carriers, during which a tellurium subchloride phase is presented as an intermediate. Significantly, the Te cathode achieves a high specific capacity of 543 mAh gTe −1 and an outstanding energy density of 850 Wh kgTe −1 , outperforming most of the previously reported cathodes. Our electrolyte analysis indicates that the addition of Mg(TFSI) 2 reduces the overall ion-molecule interaction and mitigates the strength of ion-solvent aggregation within the MACC electrolyte, which implies the facilized Cl − dissociation from the electrolyte. Besides, Mg(TFSI) 2 is verified as an essential buffer to mitigate the corrosion and passivation of Mg anodes caused by the consumption of the electrolyte MgCl 2 in Mg//Te dual-ion cells. These findings provide crucial insights into the development of advanced Mg-based dual-ion batteries. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | http://hdl.handle.net/21.11116/0000-000F-2EF2-DTest; http://hdl.handle.net/21.11116/0000-000F-2EF4-BTest |
| الإتاحة: | https://doi.org/10.1002/anie.202401818Test http://hdl.handle.net/21.11116/0000-000F-2EF2-DTest http://hdl.handle.net/21.11116/0000-000F-2EF4-BTest |
| حقوق: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: | edsbas.E50836FD |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |