期刊
ELECTROCHIMICA ACTA
卷 293, 期 -, 页码 19-24出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.10.017
关键词
Free-standing cathode; Carbon foam; Biomass carbon; Li-sulfur batteries; Electrochemical performance
资金
- National Natural Science Foundation of China [11574273and 21203168]
- Natural Science Foundation of Zhejiang Province [LY16B030003]
- Research Starting Foundation of Shaanxi University of Science and Technology [2017BJ-54, 2016TPJS-07]
Lithium-sulfur (Li-S) battery is an appealing technology due to its conspicuous advantages in the area of energy storage. However, many challenges remain, such as the design of cathode with high sulfur loading, suppression of shuttle effects, enhanced performance and large scale preparation. Here, we report a novel 3D free-standing nitrogen-doped porous carbon foam (PCF) obtained by carbonization of the natural melaleuca bark, and apply it as a binder-free current collector to host sulfur for Li-S cells. This study shows that the obtained N-doped PCF possesses sheet-like porous carbon structures, high specific surface area, and large pore volume. Taking advantage of these properties, the resulting PCF/S electrodes exhibit an initial discharge capacity of 1330 mAh g(-1), good reversible capacity of 880 mAh g(-1) after 100 cycles at 0.2 C and deliver an excellent cycling stability (over 250 cycles at 0.5 C with 0.14% capacity fading per cycle). In addition, the PCF/S electrodes with large areal mass loading of 6 mg cm(-2) show a high areal capacity of 4.14 mAh cm(-2), revealing a great potential for high energy Li-S batteries. (c) 2018 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据