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A Multi‐Wall Sn/SnO 2 @Carbon Hollow Nanofiber Anode Material for High‐Rate and Long‐Life Lithium‐Ion Batteries
Author(s) -
Gao Songwei,
Wang Nü,
Li Shuai,
Li Dianming,
Cui Zhimin,
Yue Guichu,
Liu Jingchong,
Zhao Xiaoxian,
Jiang Lei,
Zhao Yong
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201913170
Subject(s) - nanofiber , materials science , anode , carbon nanofiber , electrospinning , tin , electrolyte , electrochemistry , electrode , annealing (glass) , chemical engineering , coating , nanotechnology , lithium (medication) , composite material , carbon nanotube , metallurgy , chemistry , medicine , endocrinology , engineering , polymer
Multi‐wall Sn/SnO 2 @carbon hollow nanofibers evolved from SnO 2 nanofibers are designed and programable synthesized by electrospinning, polypyrrole coating, and annealing reduction. The synthesized hollow nanofibers have a special wire‐in‐double‐wall‐tube structure with larger specific surface area and abundant inner spaces, which can provide effective contacting area of electrolyte with electrode materials and more active sites for redox reaction. It shows excellent cycling stability by virtue of effectively alleviating pulverization of tin‐based electrode materials caused by volume expansion. Even after 2000 cycles, the wire‐in‐double‐wall‐tube Sn/SnO 2 @carbon nanofibers exhibit a high specific capacity of 986.3 mAh g −1 (1 A g −1 ) and still maintains 508.2 mAh g −1 at high current density of 5 A g −1 . This outstanding electrochemical performance suggests the multi‐wall Sn/SnO 2 @ carbon hollow nanofibers are great promising for high performance energy storage systems.