دورية أكاديمية
Highly conductive S-doped FeSe2-xSx microsphere with high tap density for practical sodium storage
| العنوان: | Highly conductive S-doped FeSe2-xSx microsphere with high tap density for practical sodium storage |
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| المؤلفون: | Shuhao Xiao, Jinxia Jiang, Ying Zhu, Jing Zhang, Hanchao Li, Rui Wu, Xiaobin Niu, Jiaqian Qin, Jun Song Chen |
| المصدر: | Advanced Powder Materials, Vol 2, Iss 4, Pp 100120- (2023) |
| بيانات النشر: | KeAi Communications Co. Ltd., 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Mining engineering. Metallurgy |
| مصطلحات موضوعية: | FeSe2, S-Doping, High conductivity, Pouch cell, Practical sodium-ion batteries, Mining engineering. Metallurgy, TN1-997 |
| الوصف: | Metal selenides have been explored as promising sodium storage materials owing to their high theoretical capacity. However, sluggish Na+ diffusion and low electronic conductivity of selenides still hinder their practical applications. Herein, FeSe2-xSx microspheres have been prepared via a self-doping solvothermal method using NH4Fe(SO4)2 as both the Fe and S source, followed by gas phase selenization. The density functional theory calculation results reveal that S doping not only improves the Na adsorption, but also lower the diffusion energy barrier of Na atoms at the S doping sites, at the same time enhance the electronic conductivity of FeSe2-xSx. The carbon-free nature of the FeSe2-xSx microspheres results in a low specific surface area and a high tap density, leading to an initial columbic efficiency of 85.6%. Compared with pure FeSe2, such FeSe2-xSx delivers a high reversible capacity of 373.6 mAh·g−1 at a high current density of 5 A·g−1 after 2000 cycles and an enhanced rate performance of 305.8 mAh·g−1 at even 50 A·g−1. Finally, the FeSe2-xSx//NVP pouch cells have been assembled, achieving high energy and volumetric energy densities of 118 Wh·kg−1 and 272 mWh·cm−3, respectively, confirming the potential of applications for the FeSe2-xSx microspheres. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2772-834X 02749149 |
| العلاقة: | http://www.sciencedirect.com/science/article/pii/S2772834X2300012XTest; https://doaj.org/toc/2772-834XTest |
| DOI: | 10.1016/j.apmate.2023.100120 |
| الوصول الحر: | https://doaj.org/article/8aca027491494e589a3056f5ae796b90Test |
| رقم الانضمام: | edsdoj.8aca027491494e589a3056f5ae796b90 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 2772834X 02749149 |
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| DOI: | 10.1016/j.apmate.2023.100120 |