DOI: 10.1016/j.scib.2020.03.019
论文题名: Ultra-stable Sb confined into N-doped carbon fibers anodes for high-performance potassium-ion batteries
作者: Liu D. ; Yang L. ; Chen Z. ; Zou G. ; Hou H. ; Hu J. ; Ji X.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 12 起始页码: 1003
结束页码: 1012
语种: 英语
中文关键词: 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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169982
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Science Bulletin,2020-01-01,65(12)