Hollow-in-hollow carbon spheres with hollow foam-like cores for lithium-sulfur batteries  

作　　者：Jun Zang Taihua An Yajie Dong Xiaoliang Fang Mingsen Zheng Quanfeng Dong Nanfeng Zheng 

机构地区：[1]Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China [2]State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

出　　处：《Nano Research》2015年第8期2663-2675,共13页纳米研究（英文版）

基　　金：We thank the National Basic Research Program of China （Nos. 2011CB932403 and 2015CB932300） and the National Natural Science Foundation of China （Nos. 21301144, 21390390, 21131005, 21333008, and 21420102001） for financial support.

摘　　要：Lithium-sulfur batteries have attracted increasing attention because of their high theoretical capadty. Using sulfur/carbon composites as the cathode materials has been demonstrated as an effective strategy to optimize sulfur utilization and enhance cycle stability as well. In this work hollow-in-hollow carbon spheres with hollow foam-like cores （HCSF@C） are prepared to improve both capability and cycling stability of lithium-sulfur batteries. With high surface area and large pore volumes, the loading of sulfur in HCSF@C reaches up to 70 wt.%. In the resulting S/HCSF@C composites, the outer carbon shell serves as an effective protection layer to trap the soluble polysulfide intermediates derived from the inner component. Consequently, the S/HCSF@C cathode retains a high capacity of 780 mAh/g after 300 cycles at a high charge/discharge rate of 1 A/g.

关 键 词：hollow spheres porous carbon sulfur/carbon cathode lithium-sulfur batteries 

分 类 号：TQ424.1[化学工程] TU356[建筑科学—结构工程]