Employment of encapsulated Si with mesoporous TiO2 layer as anode material for lithium secondary batteries

Title
Employment of encapsulated Si with mesoporous TiO2 layer as anode material for lithium secondary batteries
Authors
박상은김보은이상화이중기
Keywords
sol-gel; TiO2; silicon; secondary battery
Issue Date
2009-09
Publisher
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Citation
VOL 19, NO 4, 1023-1026
Abstract
Silicon composite of nano-capsule type is newly applied as an active anode material for lithium ion batteries. TiO2-encapsulated silicon powders were synthesized by a sol-gel reaction with titanium ethoxide. Silicon nanoparticles were successfully embedded into porous titanium oxide capsules that played as a buffer layer against drastic volume changes of silicon during the charge-discharge cycling, consequently leading to the retardation of the capacity fading of intrinsic silicon materials. The electrochemical and structural properties of silicon nanocomposites with different surface areas of encapsulating TiO2 layer were characterized by X-ray diffraction(XRD), nitrogen gas adsorption analysis by the Brunauer-Emmett-Teller(BET) equation, transmission electron microscopy(TEM), and galvanostatic charge-discharge experiments. Key words: sol-gel, TiO2, silicon, secondary battery
URI
http://pubs.kist.re.kr/handle/201004/35773
ISSN
1003-6326
Appears in Collections:
KIST Publication > Article
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