Interface enhanced well-dispersed Co9S8 nanocrystals as an efficient polysulfide host in lithium-sulfur batteries

• 作者: Chong Yan Hong Yuan Jia-Qi Huang Liqiang Mai Qiang Zhang Qiu He Xu Xu Xue Liu Yan Zhao Yu-Lun Chueh
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（9）
• 页码范围: 109-115
• 页数: 7页
• 语种: 英文

摘要

The high specific capacity and energy density of lithium-sulfur batteries have attracted strong considerations on their fundamental mechanism and energy applications.However,polysulfide shuttle is still the key issue that impedes the development of Li-S batteries.Exploring nanocrystal hosts for polysulfide immobilization and conversion is a promising way.In this contribution,we have investigated well-dispersed Co9S8 nanocrystals grown on graphene oxide (GO) nanosheets with different degrees of dispersion as cathode host materials for Li-S batteries.The CogS8-GO composite with 1 wt％ GO (GCS1) has an average crystal size of 76 nm and shows the strongest adsorption capability toward lithium polysulfides.When used as the host material for the cathode of Li-S batteries,the GCS1-sulfur composite exhibits an initial specific capacity of～1000 mAh g-1 at 0.5 C and shows an average decay rate of 0.11％ for 500 cycles.This work on the dispersion control of Co9S8 nanocrystals may inspire more investigations on well-dispersed nanocrystal based hosts for Li-S batteries.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Qiang Zhang		9	0	0.0	0.0
2	Hong Yuan		2	0	0.0	0.0
3	Chong Yan		3	0	0.0	0.0
4	Jia-Qi Huang		3	0	0.0	0.0
5	Xue Liu		1	0	0.0	0.0
6	Qiu He		1	0	0.0	0.0
7	Yan Zhao		1	0	0.0	0.0
8	Xu Xu		1	0	0.0	0.0
9	Yu-Lun Chueh		1	0	0.0	0.0
10	Liqiang Mai		1	0	0.0	0.0