A polyol-mediated synthesis of titania-based nanoparticles and their electrochemical properties.
Ti-based nanoparticles were prepared in polyol mediums of EG (ethylene glycol) and TEG (triethylene glycol), with heating treatment. Ti-based materials of dried power and heated samples showed average sizes of 4, 10, 3, and 8 nm with spherical shapes and monodispersed state, respectively. The XRD patterns of TiO2 and Li4Ti5O12 materials of dried powder and heated samples were indexed to anatase phase TiO2 (space group: I4(1)/amd) and the spinel phase (space group: Fd3m) except for the dried powder sample of Li4Ti5O12, which was corresponded with amorphous-like characteristics from the X-ray diffraction and electron diffraction pattern of Field emission-TEM analysis. The TiO2 and Li4Ti5O12 samples after heat-treated at 500 degrees C exhibited excellent high rate capabilities at a current density of 0.4 mA/cm2 during extended cycles due to their electrochemically beneficial highly crystalline characteristics, nano-sized (approximately 10 nm), and uniform distributions state.
Department of Materials Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, South Korea.
D H
DH
Kim
J W
JW
Kang
T R
TR
Kim
E J
EJ
Kim
J S
JS
Im
J
J
Kim
D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D046911:Macromolecular Substances; D011108:Polymers; C024617:polyol; C009495:titanium dioxide; D014025:Titanium