Employment of encapsulated Si with mesoporous TiO2 layer as anode material for lithium secondary batteries
- Employment of encapsulated Si with mesoporous TiO2 layer as anode material for lithium secondary batteries
- 박상은; 김보은; 이상화; 이중기
- sol-gel; TiO2; silicon; secondary battery
- Issue Date
- TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
- VOL 19, NO 4, 1023-1026
- 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
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