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Double‐Shelled Nanostructure of SnO 2 @C Tube‐in‐SnO 2 @C Tube Boosts Lithium‐Ion Storage
Author(s) -
Tian Qinghua,
Zhang Feng,
Yang Li,
Chen Peng
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201801048
Subject(s) - anode , materials science , nanostructure , lithium (medication) , electrochemistry , nanotechnology , fabrication , nanocomposite , chemical engineering , battery (electricity) , lithium ion battery , ion , tube (container) , composite material , electrode , chemistry , organic chemistry , medicine , power (physics) , alternative medicine , physics , pathology , quantum mechanics , endocrinology , engineering
In the case of SnO 2 ‐based lithium‐ion battery anodes, the double‐shelled hollow nanostructures are expected to possess better performances than their single‐shelled counterparts, but the fabrication of double‐shelled hollow nanostructures is more difficult than those with single shell because of the increased complexity of structures. Herein, a complex quasi‐SnO 2 @C tube‐in‐SnO 2 @C tube nanocomposite (SnO 2 @C DHNWs) is successfully fabricated by a well‐designed facile strategy. The possible formation mechanism of SnO 2 @C DHNWs is also speculated. More importantly, the as‐prepared SnO 2 @C DHNWs show outstanding electrochemical performance as a lithium‐ion battery anode, that is, 774.5 and 462.5 mAh g −1 are retained at 200 and 1000 mA g −1 after 450 and even 1000 cycles, respectively, demonstrating high capacity, long lifespan, and good rate performances. Thus, excellent performance makes SnO 2 @C DHNWs a promising anode material for advanced lithium‐ion batteries. Moreover, it is worth noting that this work may open up a new route to prepare complex nanostructures of SnO 2 @C composites with various morphologies.