A porous nitrogen and phosphorous dual doped graphene blocking layer for   high performance Li-S batteries

doi:10.1039/c5ta04255k

CORC > 北京大学 > 工学院

	A porous nitrogen and phosphorous dual doped graphene blocking layer for high performance Li-S batteries
	Gu, Xingxing ; Tong, Chuan-jia ; Lai, Chao ; Qiu, Jingxia ; Huang, Xiaoxiao ; Yang, Wenlong ; Wen, Bo ; Liu, Li-min ; Hou, Yanglong ; Zhang, Shanqing
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2015
关键词	LITHIUM-SULFUR BATTERIES OXYGEN REDUCTION REACTION AUGMENTED-WAVE METHOD ION BATTERIES POLYSULFIDE BATTERIES CYCLE PERFORMANCE CATHODE MATERIAL ANODE MATERIALS HYBRID CARBON
DOI	10.1039/c5ta04255k
英文摘要	Conductive confinement of sulfur and polysulfides via carbonaceous blocking layers can simultaneously address the issues of low conductivity, volume expansion of sulfur during the charge/discharge process and the polysulfide shuttling effect in lithium-sulfur (Li-S) batteries. Herein, a conductive and porous nitrogen and phosphorus dual doped graphene (p-NP-G) blocking layer is prepared via a thermal annealing and subsequent hydrothermal reaction route. The doping levels of N and P in p-NP-G as measured by X-ray photoelectron spectroscopy are ca. 4.38% and ca. 1.93%, respectively. The dual doped blocking layer exhibits higher conductivity than N or P single doped blocking layers. More importantly, density functional theory (DFT) calculations demonstrate that P atoms and -P-O groups in the p-NP-G layer offer stronger adsorption of polysulfides than the N species. The electrochemical evaluation results illustrate that the p-NP-G blocking layer can deliver superior initial capacity (1158.3 mA h g(-1) at a current density of 1C), excellent rate capability (633.7 mA h g-1 at 2C), and satisfactory cycling stability (ca. 0.09% capacity decay per cycle), which are better than those of the N or P single doped graphene. This work suggests that this synergetic combination of conductive and adsorptive confinement strategies induced by the multi-heteroatom doping scheme is a promising approach for developing high performance Li-S batteries.; ARC Discovery Grants from Australian Research Council; NSFC-RGC Joint Research Scheme [51361165201]; NSFC [51125001, 51172005]; SCI(E); EI; ARTICLE; liu@csrc.ac.cn; hou@pku.edu.cn; s.zhang@griffith.edu.au; 32; 16670-16678; 3
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/421104]
专题	工学院
推荐引用方式 GB/T 7714	Gu, Xingxing,Tong, Chuan-jia,Lai, Chao,et al. A porous nitrogen and phosphorous dual doped graphene blocking layer for high performance Li-S batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015.
APA	Gu, Xingxing.,Tong, Chuan-jia.,Lai, Chao.,Qiu, Jingxia.,Huang, Xiaoxiao.,...&Zhang, Shanqing.(2015).A porous nitrogen and phosphorous dual doped graphene blocking layer for high performance Li-S batteries.JOURNAL OF MATERIALS CHEMISTRY A.
MLA	Gu, Xingxing,et al."A porous nitrogen and phosphorous dual doped graphene blocking layer for high performance Li-S batteries".JOURNAL OF MATERIALS CHEMISTRY A (2015).