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DOI	10.1016/j.scib.2020.03.019
	Ultra-stable Sb confined into N-doped carbon fibers anodes for high-performance potassium-ion batteries
	Liu D.; Yang L.; Chen Z.; Zou G.; Hou H.; Hu J.; Ji X.
发表日期	2020
ISSN	20959273
起始页码	1003
结束页码	1012
卷号	65 期号:12
英文摘要	Antimony-based materials with high theoretical capacity are known as promising anodes for potassium-ion batteries (PIBs). However, they still face challenges from the large ionic radius of the K ion, which has sluggish kinetics. Much effort is needed to exploit high-performance electrode materials to satisfy the reversible capacity of PIBs. In this paper, nano Sb confined in N-doped carbon fibers (Sb@CN nanofibers) were successfully prepared through an electrospinning method, which was designed to improve potassium storage performances. Sb@CN nanofibers benefit from the fact that the synergy between the porous nanofiber frame structure and the uniformly distributed Sb nano-components in the carbon matrix can effectively accelerate the ion migration rate and reduce the mechanical stress caused by K+ insertion/extraction, Sb@CN nanofiber electrodes thus exhibited excellent potassium storage performance, especially long cycle stability, as expected. When utilized as a PIB anode, they delivered high reversible capacity of 360.2 mAh g−1 after 200 cycles at 50 mA g−1, and a particularly stable capacity of 212.7 mAh g−1 was also obtained after 1000 cycles even at 5000 mA g−1. Given such outstanding electrochemical performances, this work is expected to provide insight into the development and exploration of advanced alloy-type electrodes for PIBs. © 2020 Science China Press
关键词	Anode material Electrospinning Potassium-ion batteries Sb@CN nanofibers
英文关键词	Antimony; Carbon fibers; Doping (additives); Electric batteries; Electrochemical electrodes; Electrospinning; Ions; Nanofibers; Potassium; Anode material; Antimony-based materials; Electrochemical performance; Electrospinning method; High reversible capacities; Potassium ions; Reversible capacity; Theoretical capacity; Anodes
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207126
作者单位	College of Chemistry and Chemical Engineering and Hunan Province Key Laboratory of Chemical Power Source, Central South University, Changsha, 410083, China; School of Materials Science and Engineering, Central South University, Changsha, 410083, China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China; Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
推荐引用方式 GB/T 7714	Liu D.,Yang L.,Chen Z.,et al. Ultra-stable Sb confined into N-doped carbon fibers anodes for high-performance potassium-ion batteries[J],2020,65(12).
APA	Liu D..,Yang L..,Chen Z..,Zou G..,Hou H..,...&Ji X..(2020).Ultra-stable Sb confined into N-doped carbon fibers anodes for high-performance potassium-ion batteries.Science Bulletin,65(12).
MLA	Liu D.,et al."Ultra-stable Sb confined into N-doped carbon fibers anodes for high-performance potassium-ion batteries".Science Bulletin 65.12(2020).