气候变化领域集成服务门户(CCPortal): Freestanding 1T MoS 2 /graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li-S batteries

CCPortal

DOI	10.1039/c8ee03252a
	Freestanding 1T MoS 2 /graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li-S batteries
	He J.; Hartmann G.; Lee M.; Hwang G.S.; Chen Y.; Manthiram A.
发表日期	2019
ISSN	17545692
起始页码	344
结束页码	350
卷号	12 期号:1
英文摘要	A novel approach to effectively suppress the "polysulfide shuttle" in Li-S batteries is presented by designing a freestanding, three-dimensional graphene/1T MoS 2 (3DG/TM) heterostructure with highly efficient electrocatalysis properties for lithium polysulfides (LiPSs). The 3DG/TM heterostructure is constructed by few-layered graphene nanosheets sandwiched by hydrophilic, metallic, few-layered 1T MoS 2 nanosheets with abundant active sites. The porous 3D structure and the hydrophilic feature of 1T-MoS 2 are beneficial for electrolyte penetration and Li-ion transfer, and the high conductivities of both graphene and the 1T MoS 2 nanosheets facilitate electron transfer. These merits lead to a high electrocatalytic efficiency for LiPSs due to excellent ion/electron transfer and the presence of sufficient electrocatalytic active sites. Therefore, the cells with 3DG/TM exhibit outstanding electrochemical performance, with a high reversible discharge capacity of 1181 mA h g -1 and a capacity retention of 96.3% after 200 cycles. The electrocatalysis mechanism of LiPSs is further experimentally and theoretically revealed, which provides new insights and opportunities to develop advanced Li-S batteries with highly efficient electrocatalysts for LiPS conversion. © 2019 The Royal Society of Chemistry.
英文关键词	Catalysis; Electrocatalysis; Electrocatalysts; Electrolytes; Graphene; Hydrophilicity; Layered semiconductors; Lithium sulfur batteries; Lithium-ion batteries; Molybdenum compounds; Nanosheets; Polysulfides; Capacity retention; Discharge capacities; Electrocatalytic efficiencies; Electrochemical performance; Electrolyte penetration; Graphene nanosheets; Polysulfide shuttles; Three-dimensional graphene; Lithium compounds; carbon; catalysis; catalyst; electron; lithium; molybdenum; sulfide
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/190040
作者单位	Materials Science and Engineering Program and Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, United States; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China; McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	He J.,Hartmann G.,Lee M.,et al. Freestanding 1T MoS 2 /graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li-S batteries[J],2019,12(1).
APA	He J.,Hartmann G.,Lee M.,Hwang G.S.,Chen Y.,&Manthiram A..(2019).Freestanding 1T MoS 2 /graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li-S batteries.Energy & Environmental Science,12(1).
MLA	He J.,et al."Freestanding 1T MoS 2 /graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li-S batteries".Energy & Environmental Science 12.1(2019).