1. Highly Ordered Mesoporous Antimony-Doped 2 Materials for Lithium-ion Battery.
- Author
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Park, Gwi Ok, Hyung, Eunbyeol, Shon, Jeong Kuk, Kim, Hansu, and Kim, Ji Man
- Subjects
MESOPOROUS silica ,ANTIMONY ,DOPING agents (Chemistry) ,LITHIUM-ion batteries ,ELECTRIC conductivity ,ELECTRIC properties of metals - Abstract
Highly ordered mesoporous antimony-doped tin oxide (ATO) materials, containing different amount of antimony in the range of 0-50mol%, are prepared via a nanoreplication method using a mesoporous silica template. The mesoporous ATO materials thus obtained exhibit high electrical conductivity, high reversible capacity, superior cycle stability and good rate capability as anode materials for lithium-ion batteries, compared to those of pure mesoporous tin oxide. Amongst the ATO materials in this work, the mesoporous ATO material with 10mol% of antimony has highest discharge capacity of 1940mAhg
-1 (charge capacity of 1049) at the 1st cycle, best cycle performance (716mAhg-1 at 100th cycle) and excellent rate capability, which are probably due to the enhanced electrical conductivity as well as reduced crystalline size. Ordered mesoporous antimony-doped tin oxide (ATO) materials with Ia3d mesostructure were obtained using nanoreplication method. The electrical conductivity of meso-ATO-10 is drastically enhanced, compared to that of meso-ATO-0. Moreover, the Sb-doping results in the high capacity retention (67% at 100th cycle) as well as excellent rate capability. We believe that the Sb-doping reduces the possibility of aggregation of the metallic tin toward larger crystals and accommodates the electrochemically induced volume change during Li alloying-dealloying process. [ABSTRACT FROM AUTHOR]- Published
- 2015
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