气候变化领域集成服务门户(CCPortal): Synchronous immobilization and conversion of polysulfides on a VO2-VN binary host targeting high sulfur load Li-S batteries

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DOI	10.1039/c8ee01402g
	Synchronous immobilization and conversion of polysulfides on a VO2-VN binary host targeting high sulfur load Li-S batteries
	Song Y.; Zhao W.; Kong L.; Zhang L.; Zhu X.; Shao Y.; Ding F.; Zhang Q.; Sun J.; Liu Z.
发表日期	2018
ISSN	17545692
起始页码	2620
结束页码	2630
卷号	11 期号:9
英文摘要	Lithium-sulfur (Li-S) batteries are deemed as one of the most promising next-generation energy storage systems. However, their practical application is hindered by existing drawbacks such as poor cycling life and low Coulombic efficiency due to the shuttle effect of lithium polysulfides (LiPSs). We herein present an in situ constructed VO2-VN binary host which combines the merits of ultrafast anchoring (VO2) with electronic conducting (VN) to accomplish smooth immobilization-diffusion-conversion of LiPSs. Such synchronous advantages have effectively alleviated the polysulfide shuttling, promoted the redox kinetics, and hence improved the electrochemical performance of Li-S batteries. As a result, the sulfur cathode based on the VO2-VN/graphene host exhibited an impressive rate capability with ∼1105 and 935 mA h g-1 at 1C and 2C, respectively, and maintained long-term cyclability with a low capacity decay of 0.06% per cycle within 800 cycles at 2C. More remarkably, favorable cyclic stability can be attained with a high sulfur loading (13.2 mg cm-2). Even at an elevated temperature (50 °C), the cathodes still delivered superior rate capacity. Our work emphasizes the importance of immobilization-diffusion-conversion of LiPSs toward the rational design of high-load and long-life Li-S batteries. © 2018 The Royal Society of Chemistry.
英文关键词	Cathodes; Desulfurization; Lithium batteries; Lithium compounds; Polysulfides; Vanadium dioxide; Coulombic efficiency; Cyclic stability; Electrochemical performance; Elevated temperature; Energy storage systems; Rate capabilities; Rational design; Sulfur cathodes; Lithium sulfur batteries; efficiency measurement; electrical conductivity; electrochemical method; energy storage; equipment; immobilization; performance assessment; polymer; reaction kinetics; temperature effect
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190151
作者单位	Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China; Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan, 689-798, South Korea; Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China; Cambridge Graphene Centre, University of Cambridge, Cambridge, CB3 0FA, United Kingdom; Center for Nanochemistry (CNC), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Song Y.,Zhao W.,Kong L.,et al. Synchronous immobilization and conversion of polysulfides on a VO2-VN binary host targeting high sulfur load Li-S batteries[J],2018,11(9).
APA	Song Y..,Zhao W..,Kong L..,Zhang L..,Zhu X..,...&Liu Z..(2018).Synchronous immobilization and conversion of polysulfides on a VO2-VN binary host targeting high sulfur load Li-S batteries.Energy & Environmental Science,11(9).
MLA	Song Y.,et al."Synchronous immobilization and conversion of polysulfides on a VO2-VN binary host targeting high sulfur load Li-S batteries".Energy & Environmental Science 11.9(2018).