A bifunctional hierarchical porous carbon network integrated with an in situ formed ultrathin graphene shell for stable lithium-sulfur batteries

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2017专题

	A bifunctional hierarchical porous carbon network integrated with an in situ formed ultrathin graphene shell for stable lithium-sulfur batteries
	Deng, Wei; Zhou, Xufeng; Fang, Qile; Liu, Zhaoping
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017
卷号	5 期号:26 页码:13674-13682
ISSN号	2050-7488
英文摘要	For the development of high-performance Li-S batteries, the issues of the insulating nature of sulfur and shuttle effect of polysulfides need to be well addressed simultaneously, which require elaborate structure design of a suitable host for sulfur. In this work, a novel bifunctional and free-standing sulfur cathode consisted of a hierarchical porous carbon network as the conductive host for sulfur and an in situ formed graphene shell as the top layer for physical blocking of the shuttle effect is carefully fabricated. Owing to filtration assembly, an ultrathin graphene shell (similar to 100 nm in thickness) is in situ formed firstly, on which a macroporous graphene architecture is gradually deposited afterwards. Subsequent chemical vapor deposition of interwoven CNTs on both sides of graphene sheets generates numerous nano-sized cavities for loading of sulfur nanoparticles. The rationally designed electrode possesses a relatively high areal sulfur loading of similar to 3.6 mg cm(-2), and shows excellent rate capability at similar to 6.0 mA cm(-2) and cyclic stability over 200 cycles. And as the graphene nano-shell blocks the diffusion of polysulfides, the anti-self-discharge capability of the cell is remarkably improved.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13731]
专题	2017专题
推荐引用方式 GB/T 7714	Deng, Wei,Zhou, Xufeng,Fang, Qile,et al. A bifunctional hierarchical porous carbon network integrated with an in situ formed ultrathin graphene shell for stable lithium-sulfur batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(26):13674-13682.
APA	Deng, Wei,Zhou, Xufeng,Fang, Qile,&Liu, Zhaoping.(2017).A bifunctional hierarchical porous carbon network integrated with an in situ formed ultrathin graphene shell for stable lithium-sulfur batteries.JOURNAL OF MATERIALS CHEMISTRY A,5(26),13674-13682.
MLA	Deng, Wei,et al."A bifunctional hierarchical porous carbon network integrated with an in situ formed ultrathin graphene shell for stable lithium-sulfur batteries".JOURNAL OF MATERIALS CHEMISTRY A 5.26(2017):13674-13682.