Insight into the Effect of Boron Doping on Sulfur/Carbon Cathode in Lithium-Sulfur Batteries

doi:10.1021/am501627f

CORC > 化学研究所 > 中国科学院化学研究所

	Insight into the Effect of Boron Doping on Sulfur/Carbon Cathode in Lithium-Sulfur Batteries
	Yang, Chun-Peng ; Yin, Ya-Xia ; Ye, Huan ; Jiang, Ke-Cheng ; Zhang, Juan ; Guo, Yu-Guo1
刊名	ACS APPLIED MATERIALS & INTERFACES
	2014-06-11
卷号	6 期号:11 页码:8789-8795
关键词	Batteries Lithium-sulfur Batteries Sulfur/carbon Composite Boron Doping Electrochemical Properties
ISSN号	1944-8244
DOI	10.1021/am501627f
英文摘要	To exploit the high energy density of lithium-sulfur batteries, porous carbon materials have been widely used as the host materials of the S cathode. Current studies about carbon hosts are more frequently focused on the design of carbon structures rather than modification of its properties. In this study, we use boron-doped porous carbon materials as the host material of the S cathode to get an insightful investigation of the effect of B dopant on the S/C cathode. Powder electronic conductivity shows that the B-doped carbon materials exhibit higher conductivity than the pure analogous porous carbon. Moreover, by X-ray photoelectron spectroscopy, we prove that doping with B leads to a positively polarized surface of carbon substrates and allows chemisorption of S and its polysulfides. Thus, the B-doped carbons can ensure a more stable S/C cathode with satisfactory conductivity, which is demonstrated by the electrochemical performance evaluation. The S/B-doped carbon cathode was found to deliver much higher initial capacity (1300 mA h g(-1) at 0.25 C), improved cyclic stability, and rate capability when compared with the cathode based on pure porous carbon. Electrochemical impedance spectra also indicate the low resistance of the S/B-doped C cathode and the chemisorption of polysulfide anions because of the presence of B. These features of B doping can play the positive role in the electrochemical performance of S cathodes and help to build better Li-S batteries.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000337336900100
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/53133]
专题	中国科学院化学研究所
通讯作者	Guo, Yu-Guo
作者单位	1.Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yang, Chun-Peng,Yin, Ya-Xia,Ye, Huan,et al. Insight into the Effect of Boron Doping on Sulfur/Carbon Cathode in Lithium-Sulfur Batteries[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(11):8789-8795.
APA	Yang, Chun-Peng,Yin, Ya-Xia,Ye, Huan,Jiang, Ke-Cheng,Zhang, Juan,&Guo, Yu-Guo.(2014).Insight into the Effect of Boron Doping on Sulfur/Carbon Cathode in Lithium-Sulfur Batteries.ACS APPLIED MATERIALS & INTERFACES,6(11),8789-8795.
MLA	Yang, Chun-Peng,et al."Insight into the Effect of Boron Doping on Sulfur/Carbon Cathode in Lithium-Sulfur Batteries".ACS APPLIED MATERIALS & INTERFACES 6.11(2014):8789-8795.