Encapsulating sulfur into highly graphitized hollow carbon spheres as high performance cathode for lithium-sulfur batteries

被引：11
作者：
Liu, Shuangke [1 ]
Hong, Xiaobin [1 ]
Li, Yujie [1 ]
Xu, Jing [1 ]
Zheng, Chunman [1 ]
Xie, Kai [1 ]
机构：
[1] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 100期
关键词：
LI-S BATTERY; MESOPOROUS CARBON; GRAPHENE OXIDE; ONE-STEP; COMPOSITE; NANOTUBES; CAPACITY; NANOSTRUCTURE; NANOSPHERES; STABILITY;
D O I：
10.1039/c6ra22652c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Encapsulating sulfur into a highly graphitized hollow carbon sphere (GHCS) is proposed as sulfur cathode for the first time. After annealing the amorphous hollow carbon sphere (HCS) at a high temperature of 2600 degrees C, the obtained GHCS shows polyhedral morphology and few layers graphene characteristic with extremely low oxygen content. When used as sulfur cathode, the S@GHCS composite delivers a high discharge capacity of similar to 800 mA h g(-1) at 4C rate and high capacity retention of 93.7% after 240 cycles at 1C rate, demonstrating much better rate capability and cycling performance compared to those of S@HCS composite.
引用
收藏
页码：98035 / 98041
页数：7
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