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Single Nozzle Electrospinning Synthesized MoO 2 @C Core Shell Nanofibers with High Capacity and Long‐Term Stability for Lithium‐Ion Storage
Author(s) -
Chen Zhi,
Yang Ting,
Shi Huimin,
Wang Taihong,
Zhang Ming,
Cao Guozhong
Publication year - 2017
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600816
Subject(s) - materials science , nanofiber , anode , electrospinning , chemical engineering , lithium (medication) , oxide , carbon nanofiber , fabrication , carbon fibers , nanotechnology , composite material , electrode , carbon nanotube , chemistry , composite number , metallurgy , medicine , alternative medicine , pathology , endocrinology , engineering , polymer
MoO 2 @C core shell nanofibers are synthesized via a simple electrospinning method with a single nozzle. The formation mechanism of MoO 2 @C core shell nanofibers is investigated in detail and it is discovered that the phase‐segregation phenomenon may be the main driving force of thermodynamics to form MoO 2 @C core shell nanofibers, and the high temperature as the dynamic factor can accelerate the formation of these core shell nanofibers. The carbon shell of the MoO 2 @C core shell nanofibers acts as both conductive bond to increase electrical conductivity and structural skeleton to maintain the integrity of MoO 2 during Li + insertion/extraction to achieve both high specific capacity and good cyclic stability. So as an anode for lithium‐ion batteries, the MoO 2 @C core shell nanofiber electrode exhibits high specific capacity and extraordinary lifetime even at a large current density. Their reversible capacities are 665 mA h g −1 in the 600th cycle at 0.5 A g −1 . Even at a high current density of 1 A g −1 , a capacity of 537 mA h g −1 is obtained after 600 cycles. The present work may provide a facile and broadly applicable way for the fabrication and utilization of metal oxide/carbon core shell composites in fields of batteries, catalysts, and fuel cells.