کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990191 | 1516126 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A N,S-codoped hierarchical carbon Foam@Porous carbon composite as freestanding cathode for high-performance lithium-sulfur batteries
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Lithium sulfur (Li-S) battery is considered as one of promising energy-storage devices owing to its high energy density and low cost. However, it is still a great challenge to explore stable sulfur cathode with high sulfur loading and good cycling performance. Herein, we report a facile method to prepare N,S co-doped hierarchical pore structured carbon foam @porous carbon (CF@N-SPC) through a carbonation process from resin aerogel coated melamine foam with thiourea as the source for N and S codoping. The close combination of a carbon interconnected skeleton and the resin aerogel derived carbon forms the hierarchical pore structure that improves the electron and ion transport. The prepared CF@N-SPC can be used as a freestanding cathode without a conductive additive and a binder. Due to the synergistic effect of the hierarchical pore structure and N, S codoping, the sulfur loading in the carbon foam-based cathode can reach up to 10.6â¯mgâ¯cmâ2. Owing to these unique merits, the CF@N-SPC/S cathode exhibits high capacity and good cycling performance: it yields a discharge capacity of 1212â¯mAâ¯hâ¯gâ1 at 0.1â¯C with 4.0â¯mgâ¯cmâ2 sulfur loading; it also exhibits a good discharge capacity of 668â¯mAâ¯hâ¯gâ1 at 0.5â¯C when the sulfur loading increases to 10.6â¯mgâ¯cmâ2, capacity retained by 72% in 200 cycles; it experiences a very small capacity decay rate of 0.05% per cycle in 700 cycles at 1â¯C. Our rational design and facile synthesis of the carbon foam-based freestanding cathode is promising and applicable for development of high performance Li-S batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 768, 5 November 2018, Pages 495-502
Journal: Journal of Alloys and Compounds - Volume 768, 5 November 2018, Pages 495-502
نویسندگان
He Yang, Xu Zhang, Junling Guo, Weili Zhu, Shupeng Zhao, Fang Wang, Qiuyu Fan, Hongyan Xiao, Fengxiang Zhang,