NDLI: A new composite material Li$_{4}$Ti$_{5}$O$_{12}$–SnO$

Content Provider	Springer Nature Link
Author	Wang, Yan Ying Hao, Yan Jing Lai, Qiong Yu Lu, Ji Zheng Chen, Yuan Duan Ji, Xiao Yang
Copyright Year	2007
Abstract	A new Li$_{4}$Ti$_{5}$O$_{12}$–SnO$_{2}$ composite anode material for lithium-ion batteries has been prepared by loading SnO$_{2}$ on Li$_{4}$Ti$_{5}$O$_{12}$ to obtain composite material with improved electrochemical performance relative to Li$_{4}$Ti$_{5}$O$_{12}$ and SnO$_{2}$. The composite material was characterized by X-ray diffraction and scanning electron microscopy. The results indicated that SnO$_{2}$ particles have encapsulated on the surface of the Li$_{4}$Ti$_{5}$O$_{12}$ uniformly and tightly. Electrochemical results indicated that the Li$_{4}$Ti$_{5}$O$_{12}$–SnO$_{2}$ composite material increases the reversible capacity of Li$_{4}$Ti$_{5}$O$_{12}$ and has good cycling reliability. At a current rate of 0.5 mA/cm$^{2}$, the material delivered a discharge capacity of 236 mAh/g after 16 cycles. It suggests the existence of synergistic interaction between Li$_{4}$Ti$_{5}$O$_{12}$ and SnO$_{2}$ and that the capacity of the composite is not a simple weighted sum of the capacities of the individual components. In the composite material, SnO$_{2}$ can act as a bridge between the spinel particles to reduce the interparticle resistance and as a good material for the Li intercalation/deintercalation. Thus, electrochemical performance of the Li$_{4}$Ti$_{5}$O$_{12}$ spinel can be improved by the surface modification with SnO$_{2}$, and the stability of Li$_{4}$Ti$_{5}$O$_{12}$ also serves to buffer the internal stress caused by the volume changes in lithium insertion and extraction reactions.
Starting Page	85
Ending Page	88
Page Count	4
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	14
Issue Number	1
e-ISSN	18620760
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-09-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anodes Li-ion batteries Electrochemical stabilities Electrical Power Generation and Transmission Renewable Energy Sources Condensed Matter Physical Chemistry Materials Science Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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