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Nano SnO 2 in Flexible Carbon Spaces Protected by Rigid TiO 2 for Efficient Reversible Lithium Storage
Author(s) -
Zhou Yulin,
Lei Jianfei,
Jin Xiujuan,
Ni Jing,
Zhang Shaofeng,
Du Kai,
Wang Zhaowu
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802360
Subject(s) - anode , tin , materials science , tin dioxide , carbon fibers , lithium (medication) , battery (electricity) , electrochemistry , porosity , chemical engineering , particle (ecology) , nanoparticle , structural stability , nanotechnology , composite material , electrode , metallurgy , chemistry , structural engineering , medicine , power (physics) , physics , oceanography , quantum mechanics , geology , composite number , engineering , endocrinology
We report a spatially‐confined strategy to improve the cycling stability of tin‐based anode materials, in which carbon acted as passenger particle is implanted in suit into the secondary structure of porous tin dioxide (SnO 2 ), forming a spatial fault structure together with the SnO 2 particles. Herein, the carbon (C) surrounding is endowed with the dual roles, which can not only prevent SnO 2 and tin (Sn) nanoparticles aggregating for a better cycling stability, but also can improve the electron transport at the particle interface for high rate performance of the battery. Also, rigid titanium dioxide (TiO 2 ) cavities are constructed for positive mechanical protections and releasing the mechanical stress to further improve the stability of the battery. Electrochemical tests reveal that such spatially‐confined architectures can enhance the cycling stability and improve the rate properties of tin‐based anode batteries remarkably. The discharge specific capacity of the spatial confined samples can be maintained 520 mAh g ‐1 after 100 cycles at 0.2C and 320 mAh g ‐1 at a high current rate of 1C.