کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602797 | 1424081 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Metal-organic complex derived hierarchical porous carbon as host matrix for rechargeable Na-Se batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The low Se loading, volumetric expansion and polyselenide shuttling between cathode and anode are major factors to limit the further development of Na-Se batteries. To overcome above issues, metal-organic complex derived hierarchical porous carbon (HPC) was synthesized as host matrix for Se via a facile synthesis combined with annealing treatment. The unique hollow structure holds numerous micropores and mesopores for Se loading to form Se-HPC composite. The Se-HPC electrode shows outstanding rate capabilities of 330 and 260â¯mAâ¯hâ¯g-1 at 1â¯C and 5â¯C, respectively. It also exhibits a stable cycling performance for 1000 cycles at 2â¯C with a small capacity decay rate of 0.04% per cycle. Such good performance demonstrates the viability of Na-Se batteries with high Se loading of 56%, which may be attributed to the unique hollow structure of HPC with Se encapsulated within micropores and mesopores. This attractive structure not only promotes electrolyte infiltration and electron transfer but also provides additional buffer space to buffer volumetric expansion of Se and suppress polyselenides dissolution in carbonate electrolyte during cycling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 276, 20 June 2018, Pages 21-27
Journal: Electrochimica Acta - Volume 276, 20 June 2018, Pages 21-27
نویسندگان
Qiuju Xu, Heng Liu, Wenyan Du, Renming Zhan, Linyu Hu, Shujuan Bao, Chunlong Dai, Feng Liu, Maowen Xu,