دورية أكاديمية
Titanium-containing high entropy oxide (Ti-HEO): A redox expediting electrocatalyst towards lithium polysulfides for high performance Li-S batteries
| العنوان: | Titanium-containing high entropy oxide (Ti-HEO): A redox expediting electrocatalyst towards lithium polysulfides for high performance Li-S batteries |
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| المؤلفون: | Hassan Raza, Junye Cheng, Jingwei Wang, Subash Kandasamy, Guangping Zheng, Guohua Chen |
| المصدر: | Nano Research Energy, Vol 3, Iss 3, p e9120116 (2024) |
| بيانات النشر: | Tsinghua University Press, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Chemistry LCC:Physics |
| مصطلحات موضوعية: | titanium containing high entropy oxide (ti-heos), multi-metal-mofs template method, electrical conductivity, lithium-sulfur batteries, catalytic conversion, Chemistry, QD1-999, Physics, QC1-999 |
| الوصف: | Since lithium sulfur (Li-S) energy storage devices are anticipated to power portable gadgets and electric vehicles owing to their high energy density (2600 Wh·kg–1); nevertheless, their usefulness is constrained by sluggish sulfur reaction kinetics and soluble lithium polysulfide (LPS) shuttling effects. High electrically conductive bifunctional electrocatalysts are urgently needed for Li-S batteries, and high-entropy oxide (HEO) is one of the most promising electrocatalysts. In this work, we synthesize titanium-containing high entropy oxide (Ti-HEO) (TiFeNiCoMg)O with enhanced electrical conductivity through calcining metal-organic frameworks (MOF) templates at modest temperatures. The resulting single-phase Ti-HEO with high conductivity could facilitate chemical immobilization and rapid bidirectional conversion of LPS. As a result, the Ti-HEO/S/KB cathode (with 70 wt.% of sulfur) achieves an initial discharge capacity as high as ~1375 mAh·g–1 at 0.1 C, and a low-capacity fade rate of 0.056% per cycle over 1000 cycles at 0.5 C. With increased sulfur loading (~5.0 mg·cm–2), the typical Li-S cell delivered a high initial discharge capacity of ~607 mAh·g–1 at 0.2 C and showcased good cycling stability. This work provides better insight into the synthesis of catalytic Ti-containing HEOs with enhanced electrical conductivity, which are effective in simultaneously enhancing the LPS-conversion kinetics and reducing the LPS shuttling effect. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2791-0091 2790-8119 |
| Relation: | https://www.sciopen.com/article/10.26599/NRE.2024.9120116; https://doaj.org/toc/2791-0091; https://doaj.org/toc/2790-8119 |
| DOI: | 10.26599/NRE.2024.9120116 |
| URL الوصول: | https://doaj.org/article/5ff649380d41430796b074372dbf3ba6 |
| رقم الأكسشن: | edsdoj.5ff649380d41430796b074372dbf3ba6 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 27910091 27908119 |
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| DOI: | 10.26599/NRE.2024.9120116 |