Paragenesis BN/CNTs hybrid as a monoclinic sulfur host for high rate and ultra-long life lithium-sulfur battery

doi:10.1039/c8ta09564g

CORC > 金属研究所 > 中国科学院金属研究所

	Paragenesis BN/CNTs hybrid as a monoclinic sulfur host for high rate and ultra-long life lithium-sulfur battery
	He, Bin 1; Li, Wen-Cui 1; Zhang, Yu 1; Yu, Xiao-Fei 1; Zhang, Bingsen 2; Li, Feng 2; Lu, An-Hui 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2018-12-21
卷号	6 期号:47 页码:24194-24200
ISSN号	2050-7488
DOI	10.1039/c8ta09564g
通讯作者	Lu, An-Hui(anhuilu@dlut.edu.cn)
英文摘要	For lithium-sulfur (Li-S) batteries, it is critical to design advanced host materials with high conductivity and strong binding interactions with sulfur species to trap and convert the polysulfides efficiently. Here, we report a novel BN/CNTs hybrid with paragenesis structure, high surface area and O-doping via a one-step co-pyrolysis method. Such paragenesis structure can remarkably lower the contact resistance between non-conducting BN and conductive CNTs, and the O dopant in BN can narrow the bandgap of BN, both imparting the BN/CNTs hybrid a high conductivity of 1884 S m(-1). The BN/CNTs hybrid hosted sulfur shows monoclinic phase instead of the generally reported orthorhombic phase, implying a strong interaction between sulfur and the BN/CNTs hybrid. Moreover, the high surface and the O doping enable BN/CNTs hybrid to adsorb polysulfides with a superior capacity due to the polarization of electrons away from the sulfur atoms towards BN/CNTs. Thus, the BN/CNTs-sulfur cathode can deliver high specific capacity (1374 and 1068 mA h g(-1) at 0.2C and 1C, respectively), superior cycling stability (a constant coulombic efficiency of approximate to 99% and a decay rate of 0.045% per cycle along with 500 cycles at 1C) and excellent rate capability (840 mA h g(-1) at 4C). Moreover, it exhibits good high-sulfur-loading areal capacity (up to 4.5 mA h cm(-2)) with stable cell performance.
资助项目	National Science Fund for the National Natural Science Foundation of China[21473021] ; National Science Fund for the National Natural Science Foundation of China[21776041] ; National Science Fund for the National Natural Science Foundation of China[21875028] ; Cheung Kong Scholars Programme of China[T2015036]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000452482900025
资助机构	National Science Fund for the National Natural Science Foundation of China ; Cheung Kong Scholars Programme of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/130883]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lu, An-Hui
作者单位	1.Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	He, Bin,Li, Wen-Cui,Zhang, Yu,et al. Paragenesis BN/CNTs hybrid as a monoclinic sulfur host for high rate and ultra-long life lithium-sulfur battery[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(47):24194-24200.
APA	He, Bin.,Li, Wen-Cui.,Zhang, Yu.,Yu, Xiao-Fei.,Zhang, Bingsen.,...&Lu, An-Hui.(2018).Paragenesis BN/CNTs hybrid as a monoclinic sulfur host for high rate and ultra-long life lithium-sulfur battery.JOURNAL OF MATERIALS CHEMISTRY A,6(47),24194-24200.
MLA	He, Bin,et al."Paragenesis BN/CNTs hybrid as a monoclinic sulfur host for high rate and ultra-long life lithium-sulfur battery".JOURNAL OF MATERIALS CHEMISTRY A 6.47(2018):24194-24200.