中国物理B ›› 2018, Vol. 27 ›› Issue (6): 68101-068101.doi: 10.1088/1674-1056/27/6/068101
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Free-standing, curled and partially reduced graphene oxide network as sulfur host for high-performance lithium-sulfur batteries
Hui-Liang Chen(陈辉亮), Zhuo-Jian Xiao(肖卓建), Nan Zhang(张楠), Shi-Qi Xiao(肖仕奇), Xiao-Gang Xia(夏晓刚), Wei Xi(席薇), Yan-Chun Wang(王艳春), Wei-Ya Zhou(周维亚), Si-Shen Xie(解思深)
- 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China;
3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Free-standing, curled and partially reduced graphene oxide network as sulfur host for high-performance lithium-sulfur batteries
Hui-Liang Chen(陈辉亮)1,2,3, Zhuo-Jian Xiao(肖卓建)1,2,3, Nan Zhang(张楠)1,2,3, Shi-Qi Xiao(肖仕奇)1,2,3, Xiao-Gang Xia(夏晓刚)1,2,3, Wei Xi(席薇)1,2,3, Yan-Chun Wang(王艳春)1,2, Wei-Ya Zhou(周维亚)1,2,3, Si-Shen Xie(解思深)1,2,3
- 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China;
3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
摘要：
Lithium-sulfur (Li-S) batteries have received more and more attention because of higher specific capacity and energy density of sulfur than current lithium-ion batteries. However, the low electrical conductivity of sulfur and its discharge product, and also the high dissolution of polysulfides restrict the Li-S battery practical applications. To improve their performances, in this work, we fabricate a novel free-standing, curled and partially reduced graphene oxide (CPrGO for short) network and combine it with sulfur to form a CPrGO-S composite as a cathode for Li-S battery. With sulfur content of 60 wt%, the free-standing CPrGO-S composite network delievers an initial capacity of 988.9 mAh·g-1. After 200 cycles, it shows a stable capacity of 841.4 mAh·g-1 at 0.2 C, retaining about 85% of the initial value. The high electrochemical performance demonstrates that the CPrGO-S network has great potential applications in energy storage system. Such improved properties can be ascribed to the unique free-standing and continous CPrGO-S network which has high specific surface area and good electrical conductivity. In addition, oxygen-containing groups on the partially reduced graphene oxide are beneficial to preventing the polysulfides from dissolving into electrolyte and can mitigate the “shuttle effect”.
中图分类号: (Carbon/carbon-based materials)
- 81.05.U-