气候变化领域集成服务门户(CCPortal): Nanomat Li-S batteries based on all-fibrous cathode/separator assemblies and reinforced Li metal anodes: Towards ultrahigh energy density and flexibility

CCPortal

DOI	10.1039/c8ee01879k
	Nanomat Li-S batteries based on all-fibrous cathode/separator assemblies and reinforced Li metal anodes: Towards ultrahigh energy density and flexibility
	Lee S.-Y.; Kim J.-H.; Lee Y.-H.; Cho S.-J.; Gwon J.-G.; Cho H.-J.; Jang M.; Lee S.-Y.
发表日期	2019
ISSN	17545692
起始页码	177
结束页码	186
卷号	12 期号:1
英文摘要	Lithium-sulfur (Li-S) batteries have attracted considerable attention as a promising alternative to current state-of-the-art lithium-ion batteries (LIBs), however, their practical use remains elusive, which becomes more serious upon application to flexible/wearable electronics. Here, we demonstrate a new class of nanomat Li-S batteries based on all-fibrous cathode-separator assemblies and conductive nonwoven-reinforced Li metal anodes as an unprecedented strategy toward ultrahigh energy density and mechanical flexibility. Sulfur cathodes, which are fibrous mixtures of sulfur-deposited multi-walled carbon nanotubes and single-walled carbon nanotubes, are monolithically integrated with bi-layered (pristine cellulose nanofiber (CNF)-anionic CNF) paper separators, resulting in metallic foil current collector-free, all-fibrous cathode-separator assemblies. The cathode-separator assemblies, driven by their all-fibrous structure (contributing to three-dimensional bi-continuous electron/ion conduction pathways) and anionic CNFs (suppressing the shuttle effect via electrostatic repulsion), improve redox kinetics, cyclability and flexibility. Nickel-/copper-plated conductive poly(ethylene terephthalate) nonwovens are physically embedded into Li foils to fabricate reinforced Li metal anodes with dimensional/electrochemical superiority. Driven by the structural uniqueness and chemical functionalities, the nanomat Li-S cells provide exceptional improvements in electrochemical performance (the (cell-based) gravimetric/volumetric energy density = 457 W h kg cell -1 /565 W h L cell -1 and the cycling performance (over 500 cycles) under 110% capacity excess of the Li metal anode) and mechanical deformability (they even can be crumpled). © 2019 The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; Ethylene; Flexible electronics; Lithium compounds; Lithium-ion batteries; Metals; Multiwalled carbon nanotubes (MWCN); Reinforcement; Separators; Single-walled carbon nanotubes (SWCN); Sulfur compounds; Weaving; Yarn; Chemical functionality; Cycling performance; Electrochemical performance; Electrostatic repulsion; Mechanical deformability; Mechanical flexibility; Monolithically integrated; Ultra-high energies; Lithium sulfur batteries; carbon nanotube; electrode; electronic equipment; fuel cell; lithium; nanotechnology; performance assessment; Anodes; Cathodes; Ethylene; Lithium Compounds; Metals; Reinforcement
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/190016
作者单位	Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea; Department of Forest Products, National Institute of Forest Science, Seoul, 02455, South Korea; Future Technology Research Center, LG Chem., Seoul, 07796, South Korea
推荐引用方式 GB/T 7714	Lee S.-Y.,Kim J.-H.,Lee Y.-H.,et al. Nanomat Li-S batteries based on all-fibrous cathode/separator assemblies and reinforced Li metal anodes: Towards ultrahigh energy density and flexibility[J],2019,12(1).
APA	Lee S.-Y..,Kim J.-H..,Lee Y.-H..,Cho S.-J..,Gwon J.-G..,...&Lee S.-Y..(2019).Nanomat Li-S batteries based on all-fibrous cathode/separator assemblies and reinforced Li metal anodes: Towards ultrahigh energy density and flexibility.Energy & Environmental Science,12(1).
MLA	Lee S.-Y.,et al."Nanomat Li-S batteries based on all-fibrous cathode/separator assemblies and reinforced Li metal anodes: Towards ultrahigh energy density and flexibility".Energy & Environmental Science 12.1(2019).