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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Sn0.9Si0.1/carbon core-shell nanoparticles for high-density lithium storage materials

Cited 36 times inthomson ciCited 37 times inthomson ci
Title
Sn0.9Si0.1/carbon core-shell nanoparticles for high-density lithium storage materials
Author
Kwon, YoojungKim, HansuDoo, Seok-GwangCho, Jaephil
Keywords
Annealing; Carbon; Comminution; Lithium; Particle size; Tin compounds
Issue Date
2007-03
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.19, no.5, pp.982 - 986
Abstract
Sn0.9Si0.1 core/carbon shell nanoparticles, with the sizes of 16 and 10 nm, were prepared by annealing as-prepared butyl-capped Sn0.9Si0.1 particles with an average particle size of 1 μm. Even though as-prepared samples were severely encapsulated by butyl terminators, annealing led to pulverization of the bulky particles into core - shell nanoparticles with a shell thickness dependent on the annealing temperature. The core Sn0.9Si0.1 size was estimated to be constant at 6 nm, and the carbon shell thickness decreased from 10 to 4 nm with increasing annealing temperature from 600 to 700°C, respectively. In addition, the carbon shell was found to be more ordered at 700°C than at 600°C. Sn0.9Si0.1 core/carbon shell nanoparticles exhibited excellent lithium storage ability at a high current rate, resulting in a value of 964 mA·h/g at a rate of 0.3 C (1 C = 1200 mA/g), and demonstrated good capacity retention after 50 cycles.
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DOI
10.1021/cm062035p
ISSN
0897-4756
Appears in Collections:
ECHE_Journal Papers
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