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Paragenesis BN/CNTs hybrid as a monoclinic sulfur host for high rate and ultra-long life lithium-sulfur battery
He, Bin1; Li, Wen-Cui1; Zhang, Yu1; Yu, Xiao-Fei1; Zhang, Bingsen2; Li, Feng2; Lu, An-Hui1
Corresponding AuthorLu, An-Hui(anhuilu@dlut.edu.cn)
2018-12-21
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume6Issue:47Pages:24194-24200
AbstractFor 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.
Funding OrganizationNational Science Fund for the National Natural Science Foundation of China ; Cheung Kong Scholars Programme of China
DOI10.1039/c8ta09564g
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000452482900025
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/130884
Collection中国科学院金属研究所
Corresponding AuthorLu, An-Hui
Affiliation1.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
Recommended Citation
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.
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